This is B-roll video of Anatok Creek, Kobuk Valley National Park, Alaska from August 19, 2025.
Joshua C Koch, Ph.D.
Surface water / groundwater interactions; hyporheic zone hydrology and biogeochemistry; carbon, nitrogen, and phosphorus cycling; flow above / through frozen ground; preferential flow and soil pipe formation and transport.
Science and Products
Filter Total Items: 17
The Rusting of Arctic Rivers: Freshwater Ecosystems Respond to Rapidly Uptaking Metals
The water quality of streams and rivers in the Arctic is sensitive to rapid climate change and altered disturbance regimes.
Hydro-Ecology of Arctic Thawing (HEAT): Ecology
Permafrost thaw is leading to a myriad of changes in physical and chemical conditions throughout the Arctic.
Hydro-Ecology of Arctic Thawing (HEAT): Hydrology
The Arctic is warming at higher rates than much of the rest of the world. For Alaska, this results in changes in hydrology and ecosystems – permafrost is thawing, changing landscapes and releasing nutrients to soils and streams.
Q&A: Arctic Rivers Project
Alaska is home to numerous cultural and linguistic Indigenous groups and the largest number of Federally Recognized Tribes in the United States. Indigenous Alaskans, often living in rural remote communities, are facing multiple impacts due to climate change. As infrastructure, landscapes, and subsistence resources continue to be impacted by warming temperatures, the safety, well-being, and...
Groundwater Flow and Temperature Modeling to Predict Stream Temperatures in Beaver Creek, Kenai Peninsula, Alaska
Salmon are an important resource to the ecosystems, economy, and culture of the Kenai Peninsula, Alaska. However, salmon are under increasing stress due to warming water temperatures and decreasing stream flow. Groundwater is a major contributor to many streams that can help maintain fish habitat during low flows and contributes cooler water that regulates stream temperatures in the warm...
Assessment of Critical Landscape Conditions and Potential Change in the Coastal Plain of the Arctic National Wildlife Refuge to Support Habitat Management Decision Making
Areas along the Arctic coast are changing the fastest among all of Earth’s habitats due to climate change. The Arctic coast is a fragile ecosystem that provides habitat for migratory birds, endangered species, and species critical for local subsistence living. In this area, permafrost is thawing rapidly, changing how much and when water reaches rivers, ponds, lakes, wetlands and...
Beavers Impacting Tundra Ecosystems (BITE)
The range expansion of the North American beaver ( Castor canadensis) has implications for water quality, aquatic ecosystems, and fisheries in Arctic streams.
Biogeochemistry of glaciers
Significant change to the Arctic and sub-arctic water cycle is underway, impacting hydrologic and biogeochemical fluxes. In southcentral Alaska, glacier mass loss, changes to precipitation (including the rain/snow fraction), thawing ground ice, and vegetation encroachment will change both magnitude and timing of water and solute fluxes downstream. Although altered fluxes of limiting nutrients are...
Arctic Lake Food Webs
From 2011 to 2013 we investigated freshwater food webs of Arctic Coastal Plain lakes in Alaska to improve our understanding how Arctic freshwater food webs may respond to landscape change the warmer, drier future.
Wolverine Glacier Ecosystem Studies
This project is an extension of the long-term Wolverine Glacier Benchmark Glacier project and is improving our understanding of solutes and nutrients in glacier basins, and how they fuel downstream ecosystems.
Matanuska-Susitna Borough Wetland Modeling
This project aims to improve our understanding of the role of wetlands in controlling streamflow in southcentral Alaska using a groundwater – surface water flow model that can recreate the dynamic interactions between streams and wetlands.
Arctic Coastal Plain Studies
The Arctic Coastal Plain (ACP) is a large region of low-lying, lake-rich land on the North Slope of Alaska. This region is underlain by thick ground ice, which is susceptible to erosion and thaw. These physical changes are likely to alter ecosystems by changing the availability of habitats and food resources upon which wildlife depends. Our studies on the ACP aim to understand the link between...
Filter Total Items: 68
Rusting Rivers B-Roll: Anatok Creek, Alaska
This is B-roll video of Anatok Creek, Kobuk Valley National Park, Alaska from August 19, 2025.
Rusting Rivers B-Roll: Igning River, Alaska
This is B-roll video of the Igning River, Gates of the Arctic National Park and Preserve, Alaska from August 26, 2024.
This is B-roll video of the Igning River, Gates of the Arctic National Park and Preserve, Alaska from August 26, 2024.
Rusting Rivers B-Roll: Kugururok River, Alaska
This is B-roll video of the Kugururok River, Noatak National Preserve, Alaska from August 30, 2025.
This is B-roll video of the Kugururok River, Noatak National Preserve, Alaska from August 30, 2025.
An acid seep on the Nakolikurok Creek
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Acidic waters kill and blacken vegetation as they plunge downhill towards the Nakolikurok Creek
Acidic waters kill and blacken vegetation as they plunge downhill towards the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Acidic waters kill and blacken vegetation as they plunge downhill towards the Nakolikurok Creek
Acidic waters kill and blacken vegetation as they plunge downhill towards the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Kugururok River in Alaska's Noatak National Preserve
An orange tributary of the Kugururok River in Alaska's Noatak National PreserveOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Kugururok River in Alaska's Noatak National Preserve
An orange tributary of the Kugururok River in Alaska's Noatak National PreserveOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange waters mixing in to the mainstem of the Kugururok River
Orange waters mixing in to the mainstem of the Kugururok RiverOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange waters mixing in to the mainstem of the Kugururok River
Orange waters mixing in to the mainstem of the Kugururok RiverOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Kugururok River in Noatak National Preserve, Alaska
An orange tributary of the Kugururok River in Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Kugururok River in Noatak National Preserve, Alaska
An orange tributary of the Kugururok River in Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Bear tracks in an orange tributary of the Kugururok River, Noatak National Preserve, Alaska
Bear tracks in an orange tributary of the Kugururok River, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Bear tracks in an orange tributary of the Kugururok River, Noatak National Preserve, Alaska
Bear tracks in an orange tributary of the Kugururok River, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Mixing of an orange tributary and Kugururok River, Noatak National Preserve, Alaska
Mixing of an orange tributary and Kugururok River, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Mixing of an orange tributary and Kugururok River, Noatak National Preserve, Alaska
Mixing of an orange tributary and Kugururok River, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Drift net collecting samples in orange tributary of Anatok Creek, Kobuk Valley National Park, Alaska
Drift net collecting samples in orange tributary of Anatok Creek, Kobuk Valley National Park, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Drift net collecting samples in orange tributary of Anatok Creek, Kobuk Valley National Park, Alaska
Drift net collecting samples in orange tributary of Anatok Creek, Kobuk Valley National Park, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Anatok Creek, Kobuk Valley National Park, Alaska
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange staining in a side channel of the Nakolikurok Creek
Orange staining in a side channel of the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange staining in a side channel of the Nakolikurok Creek
Orange staining in a side channel of the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Emergence of acidic waters from a seep in the Agashashok River Watershed
Emergence of acidic waters from a seep in the Agashashok River WatershedOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Emergence of acidic waters from a seep in the Agashashok River Watershed
Emergence of acidic waters from a seep in the Agashashok River WatershedOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Igning River, Gates of the Arctic National Park and Preserve, Alaska
An orange tributary of the Igning River, Gates of the Arctic National Park and Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Igning River, Gates of the Arctic National Park and Preserve, Alaska
An orange tributary of the Igning River, Gates of the Arctic National Park and Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Arctic Grayling (Thymallus arctus) caught in the Nakolikuruk River near an orange tributary, Noatak National Preserve, Alaska
Arctic Grayling (Thymallus arctus) caught in the Nakolikuruk River near an orange tributary, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Arctic Grayling (Thymallus arctus) caught in the Nakolikuruk River near an orange tributary, Noatak National Preserve, Alaska
Arctic Grayling (Thymallus arctus) caught in the Nakolikuruk River near an orange tributary, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Rusting Rivers b-roll - Kugororuk River
This is B-roll video of the Kugororuk River in Noatak National Park and Preserve, Alaska from July 17, 2023.
This is B-roll video of the Kugororuk River in Noatak National Park and Preserve, Alaska from July 17, 2023.
Surveying for "rusting rivers" in the Nakolikurok Creek watershed, Noatak National Preserve, Alaska
Surveying for "rusting rivers" in the Nakolikurok Creek watershed, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Surveying for "rusting rivers" in the Nakolikurok Creek watershed, Noatak National Preserve, Alaska
Surveying for "rusting rivers" in the Nakolikurok Creek watershed, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Researchers following orange staining up the braidplain of the Nakolikurok Creek
Researchers following orange staining up the braidplain of the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Researchers following orange staining up the braidplain of the Nakolikurok Creek
Researchers following orange staining up the braidplain of the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Researchers walking to a site to sample rusting in the Nakolikurok Creek Watershed
Researchers walking to a site to sample rusting in the Nakolikurok Creek WatershedOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Researchers walking to a site to sample rusting in the Nakolikurok Creek Watershed
Researchers walking to a site to sample rusting in the Nakolikurok Creek WatershedOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
A seep emanates from a hillslope in the Nakolikurok Creek Watershed, blackening vegetation and staining the streambanks orange
A seep emanates from a hillslope in the Nakolikurok Creek Watershed, blackening vegetation and staining the streambanks orangeOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
A seep emanates from a hillslope in the Nakolikurok Creek Watershed, blackening vegetation and staining the streambanks orange
A seep emanates from a hillslope in the Nakolikurok Creek Watershed, blackening vegetation and staining the streambanks orangeOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Science and Products
Filter Total Items: 17
The Rusting of Arctic Rivers: Freshwater Ecosystems Respond to Rapidly Uptaking Metals
The water quality of streams and rivers in the Arctic is sensitive to rapid climate change and altered disturbance regimes.
Hydro-Ecology of Arctic Thawing (HEAT): Ecology
Permafrost thaw is leading to a myriad of changes in physical and chemical conditions throughout the Arctic.
Hydro-Ecology of Arctic Thawing (HEAT): Hydrology
The Arctic is warming at higher rates than much of the rest of the world. For Alaska, this results in changes in hydrology and ecosystems – permafrost is thawing, changing landscapes and releasing nutrients to soils and streams.
Q&A: Arctic Rivers Project
Alaska is home to numerous cultural and linguistic Indigenous groups and the largest number of Federally Recognized Tribes in the United States. Indigenous Alaskans, often living in rural remote communities, are facing multiple impacts due to climate change. As infrastructure, landscapes, and subsistence resources continue to be impacted by warming temperatures, the safety, well-being, and...
Groundwater Flow and Temperature Modeling to Predict Stream Temperatures in Beaver Creek, Kenai Peninsula, Alaska
Salmon are an important resource to the ecosystems, economy, and culture of the Kenai Peninsula, Alaska. However, salmon are under increasing stress due to warming water temperatures and decreasing stream flow. Groundwater is a major contributor to many streams that can help maintain fish habitat during low flows and contributes cooler water that regulates stream temperatures in the warm...
Assessment of Critical Landscape Conditions and Potential Change in the Coastal Plain of the Arctic National Wildlife Refuge to Support Habitat Management Decision Making
Areas along the Arctic coast are changing the fastest among all of Earth’s habitats due to climate change. The Arctic coast is a fragile ecosystem that provides habitat for migratory birds, endangered species, and species critical for local subsistence living. In this area, permafrost is thawing rapidly, changing how much and when water reaches rivers, ponds, lakes, wetlands and...
Beavers Impacting Tundra Ecosystems (BITE)
The range expansion of the North American beaver ( Castor canadensis) has implications for water quality, aquatic ecosystems, and fisheries in Arctic streams.
Biogeochemistry of glaciers
Significant change to the Arctic and sub-arctic water cycle is underway, impacting hydrologic and biogeochemical fluxes. In southcentral Alaska, glacier mass loss, changes to precipitation (including the rain/snow fraction), thawing ground ice, and vegetation encroachment will change both magnitude and timing of water and solute fluxes downstream. Although altered fluxes of limiting nutrients are...
Arctic Lake Food Webs
From 2011 to 2013 we investigated freshwater food webs of Arctic Coastal Plain lakes in Alaska to improve our understanding how Arctic freshwater food webs may respond to landscape change the warmer, drier future.
Wolverine Glacier Ecosystem Studies
This project is an extension of the long-term Wolverine Glacier Benchmark Glacier project and is improving our understanding of solutes and nutrients in glacier basins, and how they fuel downstream ecosystems.
Matanuska-Susitna Borough Wetland Modeling
This project aims to improve our understanding of the role of wetlands in controlling streamflow in southcentral Alaska using a groundwater – surface water flow model that can recreate the dynamic interactions between streams and wetlands.
Arctic Coastal Plain Studies
The Arctic Coastal Plain (ACP) is a large region of low-lying, lake-rich land on the North Slope of Alaska. This region is underlain by thick ground ice, which is susceptible to erosion and thaw. These physical changes are likely to alter ecosystems by changing the availability of habitats and food resources upon which wildlife depends. Our studies on the ACP aim to understand the link between...
Filter Total Items: 68
Rusting Rivers B-Roll: Anatok Creek, Alaska
This is B-roll video of Anatok Creek, Kobuk Valley National Park, Alaska from August 19, 2025.
This is B-roll video of Anatok Creek, Kobuk Valley National Park, Alaska from August 19, 2025.
Rusting Rivers B-Roll: Igning River, Alaska
This is B-roll video of the Igning River, Gates of the Arctic National Park and Preserve, Alaska from August 26, 2024.
This is B-roll video of the Igning River, Gates of the Arctic National Park and Preserve, Alaska from August 26, 2024.
Rusting Rivers B-Roll: Kugururok River, Alaska
This is B-roll video of the Kugururok River, Noatak National Preserve, Alaska from August 30, 2025.
This is B-roll video of the Kugururok River, Noatak National Preserve, Alaska from August 30, 2025.
An acid seep on the Nakolikurok Creek
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Acidic waters kill and blacken vegetation as they plunge downhill towards the Nakolikurok Creek
Acidic waters kill and blacken vegetation as they plunge downhill towards the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Acidic waters kill and blacken vegetation as they plunge downhill towards the Nakolikurok Creek
Acidic waters kill and blacken vegetation as they plunge downhill towards the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Kugururok River in Alaska's Noatak National Preserve
An orange tributary of the Kugururok River in Alaska's Noatak National PreserveOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Kugururok River in Alaska's Noatak National Preserve
An orange tributary of the Kugururok River in Alaska's Noatak National PreserveOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange waters mixing in to the mainstem of the Kugururok River
Orange waters mixing in to the mainstem of the Kugururok RiverOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange waters mixing in to the mainstem of the Kugururok River
Orange waters mixing in to the mainstem of the Kugururok RiverOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Kugururok River in Noatak National Preserve, Alaska
An orange tributary of the Kugururok River in Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Kugururok River in Noatak National Preserve, Alaska
An orange tributary of the Kugururok River in Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Bear tracks in an orange tributary of the Kugururok River, Noatak National Preserve, Alaska
Bear tracks in an orange tributary of the Kugururok River, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Bear tracks in an orange tributary of the Kugururok River, Noatak National Preserve, Alaska
Bear tracks in an orange tributary of the Kugururok River, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Mixing of an orange tributary and Kugururok River, Noatak National Preserve, Alaska
Mixing of an orange tributary and Kugururok River, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Mixing of an orange tributary and Kugururok River, Noatak National Preserve, Alaska
Mixing of an orange tributary and Kugururok River, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Drift net collecting samples in orange tributary of Anatok Creek, Kobuk Valley National Park, Alaska
Drift net collecting samples in orange tributary of Anatok Creek, Kobuk Valley National Park, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Drift net collecting samples in orange tributary of Anatok Creek, Kobuk Valley National Park, Alaska
Drift net collecting samples in orange tributary of Anatok Creek, Kobuk Valley National Park, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Anatok Creek, Kobuk Valley National Park, Alaska
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange staining in a side channel of the Nakolikurok Creek
Orange staining in a side channel of the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange staining in a side channel of the Nakolikurok Creek
Orange staining in a side channel of the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Emergence of acidic waters from a seep in the Agashashok River Watershed
Emergence of acidic waters from a seep in the Agashashok River WatershedOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Emergence of acidic waters from a seep in the Agashashok River Watershed
Emergence of acidic waters from a seep in the Agashashok River WatershedOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Igning River, Gates of the Arctic National Park and Preserve, Alaska
An orange tributary of the Igning River, Gates of the Arctic National Park and Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
An orange tributary of the Igning River, Gates of the Arctic National Park and Preserve, Alaska
An orange tributary of the Igning River, Gates of the Arctic National Park and Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Arctic Grayling (Thymallus arctus) caught in the Nakolikuruk River near an orange tributary, Noatak National Preserve, Alaska
Arctic Grayling (Thymallus arctus) caught in the Nakolikuruk River near an orange tributary, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Arctic Grayling (Thymallus arctus) caught in the Nakolikuruk River near an orange tributary, Noatak National Preserve, Alaska
Arctic Grayling (Thymallus arctus) caught in the Nakolikuruk River near an orange tributary, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Rusting Rivers b-roll - Kugororuk River
This is B-roll video of the Kugororuk River in Noatak National Park and Preserve, Alaska from July 17, 2023.
This is B-roll video of the Kugororuk River in Noatak National Park and Preserve, Alaska from July 17, 2023.
Surveying for "rusting rivers" in the Nakolikurok Creek watershed, Noatak National Preserve, Alaska
Surveying for "rusting rivers" in the Nakolikurok Creek watershed, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Surveying for "rusting rivers" in the Nakolikurok Creek watershed, Noatak National Preserve, Alaska
Surveying for "rusting rivers" in the Nakolikurok Creek watershed, Noatak National Preserve, AlaskaOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Researchers following orange staining up the braidplain of the Nakolikurok Creek
Researchers following orange staining up the braidplain of the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Researchers following orange staining up the braidplain of the Nakolikurok Creek
Researchers following orange staining up the braidplain of the Nakolikurok CreekOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Researchers walking to a site to sample rusting in the Nakolikurok Creek Watershed
Researchers walking to a site to sample rusting in the Nakolikurok Creek WatershedOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Researchers walking to a site to sample rusting in the Nakolikurok Creek Watershed
Researchers walking to a site to sample rusting in the Nakolikurok Creek WatershedOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
A seep emanates from a hillslope in the Nakolikurok Creek Watershed, blackening vegetation and staining the streambanks orange
A seep emanates from a hillslope in the Nakolikurok Creek Watershed, blackening vegetation and staining the streambanks orangeOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
A seep emanates from a hillslope in the Nakolikurok Creek Watershed, blackening vegetation and staining the streambanks orange
A seep emanates from a hillslope in the Nakolikurok Creek Watershed, blackening vegetation and staining the streambanks orangeOrange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government