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Anya Leach (Former Employee)

Science and Products

An red iron bridge crosses two cement lined canal channels. One side of the bridge is raised to allow passage. Partly cloudy

Lake Washington Ship Canal Sustainable Rivers Project

The U.S. Geological Survey (USGS) and the U.S. Army Corps of Engineers (USACE) are refining a water quality model to better understand temperature and salinity dynamics in the Lake Washington Ship Canal. This effort is supported by the Sustainable Rivers Program, a partnership between the USACE and The Nature Conservancy (TNC).
By
Oregon Water Science Center, Washington Water Science Center
Lake Washington Ship Canal Sustainable Rivers Project

Lake Washington Ship Canal Sustainable Rivers Project

The U.S. Geological Survey (USGS) and the U.S. Army Corps of Engineers (USACE) are refining a water quality model to better understand temperature and salinity dynamics in the Lake Washington Ship Canal. This effort is supported by the Sustainable Rivers Program, a partnership between the USACE and The Nature Conservancy (TNC).
Learn More

Stream Temperature and Thermal Sensitivity in Great Basin Region, 2011 - 2021 Stream Temperature and Thermal Sensitivity in Great Basin Region, 2011 - 2021

Warming climates, declining winter snowpacks, and increased periods of drought have contributed to warming stream temperatures and declining stream flows, impacting habitat availability for cold water species. Particularly in the northern Great Basin region available habitat may be restricted to headwaters, where cooler temperatures and reliable stream flows allow cold water species...
By
Washington Water Science Center

Sediment and dissolved oxygen data to support fine sediment intrusion in Chinook salmon spawning gravels, Sauk River, Washington Sediment and dissolved oxygen data to support fine sediment intrusion in Chinook salmon spawning gravels, Sauk River, Washington

This Data Release contains supporting data to evaluate fine sediment infiltration into gravels in identified locations of Chinook spawning habitat at three sites on the Sauk River, located in western Washington. Fine sediment infiltration into the river substrate that salmonid fish species use to spawn has been shown to increase mortality during the incubation and pre-emergence phase...
By
Washington Water Science Center

Stream Temperature Models of White River Watershed, Mount Rainier National Park, Washington Stream Temperature Models of White River Watershed, Mount Rainier National Park, Washington

Water temperature is an important characteristic of stream conditions with implications for water quality and stream dwelling organisms. This Data Release contains spatial stream network (SSN) objects and R scripts to run SSN models to predict mean monthly stream temperature and 7-day average daily maximum (Max7DAD) during August and September in the White River watershed within Mount...
By
Pacific Coastal and Marine Science Center, Washington Water Science Center

Water Temperature Dynamics in the Quillayute River Basin, Washington, 2021 - 2023 (ver. 2.0, February 2025) Water Temperature Dynamics in the Quillayute River Basin, Washington, 2021 - 2023 (ver. 2.0, February 2025)

The Quillayute River Basin in northwestern Washington consists of the Quillayute River and the river systems of its major tributaries, the Dickey, Sol Duc, and Bogachiel Rivers. With a drainage area of 629 square miles, the Quillayute River Basin provides important habitat for 23 distinct runs of anadromous steelhead and salmon, representing one of the largest and most productive...
By
Washington Water Science Center

Spatial stream network modeling of water temperature within the White River Basin, Mount Rainier National Park, Washington Spatial stream network modeling of water temperature within the White River Basin, Mount Rainier National Park, Washington

Water temperature is a primary control on the occurrence and distribution of fish and other ectothermic aquatic species. In the Pacific Northwest, cold-water species such as Pacific salmon (Oncorhynchus spp.) and bull trout (Salvelinus confluentus) have specific temperature requirements during different life stages that must be met to ensure the viability of their populations. Rivers...
Authors
Andrew S. Gendaszek, Anya C. Leach, Kristin L. Jaeger
By
Washington Water Science Center

Review of the Lake Washington Ship Canal and Ballard Locks model, Seattle, Washington, 2014–20 Review of the Lake Washington Ship Canal and Ballard Locks model, Seattle, Washington, 2014–20

Executive SummaryThe Hiram M. Chittenden (Ballard) Locks and Lake Washington Ship Canal connect freshwater Lake Washington and saline Shilshole Bay of Puget Sound in Seattle, Washington. The locks and canal allow for ships to traverse this reach. Anadromous salmonids also migrate through, transitioning between saline and freshwater environments, and making use of a fish ladder at the...
Authors
Annett B. Sullivan, Anya C. Leach
By
Water Resources Mission Area, Oregon Water Science Center

Quantifying fine sediment infiltration in spawning gravel used by Chinook salmon (Oncorhynchus tshawytscha) in the Sauk River Basin, Washington, 2018–21 Quantifying fine sediment infiltration in spawning gravel used by Chinook salmon (Oncorhynchus tshawytscha) in the Sauk River Basin, Washington, 2018–21

Fine sediment can infiltrate into river substrate that salmonid fish species (Oncorhynchus spp.) use to spawn. High levels of sediment infiltration can increase egg-to-fry mortality, which corresponds to the period when salmonids are still residing in the subsurface gravels. This study quantifies fine sediment infiltration of Chinook salmon (Oncorhynchus tshawytscha) spawning habitat...
Authors
Kristin L. Jaeger, Scott W. Anderson, Anya C. Leach, Scott T. Morris
By
Water Resources Mission Area, Washington Water Science Center

Spatial variability of water temperature within the White River basin, Mount Rainier National Park Washington Spatial variability of water temperature within the White River basin, Mount Rainier National Park Washington

Water temperature is a primary control on the occurrence and distribution of cold-water species. Rivers draining Mount Rainier in western Washington, including the White River along its northern flank, support several cold-water fish populations, but the spatial distribution of water temperatures, particularly during late-summer base flow between August and September, and the climatic...
Authors
Andrew Gendaszek, Anya Clare Leach, Kristin Jaeger
By
Water Resources Mission Area, Washington Water Science Center

Science and Products

An red iron bridge crosses two cement lined canal channels. One side of the bridge is raised to allow passage. Partly cloudy

Lake Washington Ship Canal Sustainable Rivers Project

The U.S. Geological Survey (USGS) and the U.S. Army Corps of Engineers (USACE) are refining a water quality model to better understand temperature and salinity dynamics in the Lake Washington Ship Canal. This effort is supported by the Sustainable Rivers Program, a partnership between the USACE and The Nature Conservancy (TNC).
By
Oregon Water Science Center, Washington Water Science Center
Lake Washington Ship Canal Sustainable Rivers Project

Lake Washington Ship Canal Sustainable Rivers Project

The U.S. Geological Survey (USGS) and the U.S. Army Corps of Engineers (USACE) are refining a water quality model to better understand temperature and salinity dynamics in the Lake Washington Ship Canal. This effort is supported by the Sustainable Rivers Program, a partnership between the USACE and The Nature Conservancy (TNC).
Learn More

Stream Temperature and Thermal Sensitivity in Great Basin Region, 2011 - 2021 Stream Temperature and Thermal Sensitivity in Great Basin Region, 2011 - 2021

Warming climates, declining winter snowpacks, and increased periods of drought have contributed to warming stream temperatures and declining stream flows, impacting habitat availability for cold water species. Particularly in the northern Great Basin region available habitat may be restricted to headwaters, where cooler temperatures and reliable stream flows allow cold water species...
By
Washington Water Science Center

Sediment and dissolved oxygen data to support fine sediment intrusion in Chinook salmon spawning gravels, Sauk River, Washington Sediment and dissolved oxygen data to support fine sediment intrusion in Chinook salmon spawning gravels, Sauk River, Washington

This Data Release contains supporting data to evaluate fine sediment infiltration into gravels in identified locations of Chinook spawning habitat at three sites on the Sauk River, located in western Washington. Fine sediment infiltration into the river substrate that salmonid fish species use to spawn has been shown to increase mortality during the incubation and pre-emergence phase...
By
Washington Water Science Center

Stream Temperature Models of White River Watershed, Mount Rainier National Park, Washington Stream Temperature Models of White River Watershed, Mount Rainier National Park, Washington

Water temperature is an important characteristic of stream conditions with implications for water quality and stream dwelling organisms. This Data Release contains spatial stream network (SSN) objects and R scripts to run SSN models to predict mean monthly stream temperature and 7-day average daily maximum (Max7DAD) during August and September in the White River watershed within Mount...
By
Pacific Coastal and Marine Science Center, Washington Water Science Center

Water Temperature Dynamics in the Quillayute River Basin, Washington, 2021 - 2023 (ver. 2.0, February 2025) Water Temperature Dynamics in the Quillayute River Basin, Washington, 2021 - 2023 (ver. 2.0, February 2025)

The Quillayute River Basin in northwestern Washington consists of the Quillayute River and the river systems of its major tributaries, the Dickey, Sol Duc, and Bogachiel Rivers. With a drainage area of 629 square miles, the Quillayute River Basin provides important habitat for 23 distinct runs of anadromous steelhead and salmon, representing one of the largest and most productive...
By
Washington Water Science Center

Spatial stream network modeling of water temperature within the White River Basin, Mount Rainier National Park, Washington Spatial stream network modeling of water temperature within the White River Basin, Mount Rainier National Park, Washington

Water temperature is a primary control on the occurrence and distribution of fish and other ectothermic aquatic species. In the Pacific Northwest, cold-water species such as Pacific salmon (Oncorhynchus spp.) and bull trout (Salvelinus confluentus) have specific temperature requirements during different life stages that must be met to ensure the viability of their populations. Rivers...
Authors
Andrew S. Gendaszek, Anya C. Leach, Kristin L. Jaeger
By
Washington Water Science Center

Review of the Lake Washington Ship Canal and Ballard Locks model, Seattle, Washington, 2014–20 Review of the Lake Washington Ship Canal and Ballard Locks model, Seattle, Washington, 2014–20

Executive SummaryThe Hiram M. Chittenden (Ballard) Locks and Lake Washington Ship Canal connect freshwater Lake Washington and saline Shilshole Bay of Puget Sound in Seattle, Washington. The locks and canal allow for ships to traverse this reach. Anadromous salmonids also migrate through, transitioning between saline and freshwater environments, and making use of a fish ladder at the...
Authors
Annett B. Sullivan, Anya C. Leach
By
Water Resources Mission Area, Oregon Water Science Center

Quantifying fine sediment infiltration in spawning gravel used by Chinook salmon (Oncorhynchus tshawytscha) in the Sauk River Basin, Washington, 2018–21 Quantifying fine sediment infiltration in spawning gravel used by Chinook salmon (Oncorhynchus tshawytscha) in the Sauk River Basin, Washington, 2018–21

Fine sediment can infiltrate into river substrate that salmonid fish species (Oncorhynchus spp.) use to spawn. High levels of sediment infiltration can increase egg-to-fry mortality, which corresponds to the period when salmonids are still residing in the subsurface gravels. This study quantifies fine sediment infiltration of Chinook salmon (Oncorhynchus tshawytscha) spawning habitat...
Authors
Kristin L. Jaeger, Scott W. Anderson, Anya C. Leach, Scott T. Morris
By
Water Resources Mission Area, Washington Water Science Center

Spatial variability of water temperature within the White River basin, Mount Rainier National Park Washington Spatial variability of water temperature within the White River basin, Mount Rainier National Park Washington

Water temperature is a primary control on the occurrence and distribution of cold-water species. Rivers draining Mount Rainier in western Washington, including the White River along its northern flank, support several cold-water fish populations, but the spatial distribution of water temperatures, particularly during late-summer base flow between August and September, and the climatic...
Authors
Andrew Gendaszek, Anya Clare Leach, Kristin Jaeger
By
Water Resources Mission Area, Washington Water Science Center
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