The yellow raft of SCREE expedition leader, Tom Minckley, floating through calm waters of Browns Park National Wildlife Refuge, Colorado. The far bank in the midground of the photo are the exposed sediments of the pre-dam floodplain of the Green River. The layers of rock in the background are the exposed layers of the red Uinta Mountain Group quartzite.
Jason S. Alexander (Former Employee)
Science and Products
Wyoming Landscape Conservation Initiative: Water Resources
The Wyoming Landscape Conservation Initiative is a long-term science-based effort to assess and enhance aquatic and terrestrial habitats at a landscape scale in southwest Wyoming, while facilitating responsible development through local collaboration and partnerships. The WLCI is an interagency working group of partners that is beginning the process of establishing a much larger coalition of...
Characterizing Hydrologic and Geomorphic Processes in a Spring-Fed, Cold-Desert Headwater Stream
The role of natural versus human-influenced factors in sedimentation of Littlefield Creek, a small, high-desert creek in south-central Wyoming is currently unknown. In general, there is little empirical information about both hydrologic and geomorphic processes (together described as hydrogeomorphic) in these types of streams. To develop a better understanding of hydrogeomorphic processes, their...
Peak-Flow Frequency Analysis for Selected Montana Streamgages
Peak-flow frequency information is needed for flood-plain mapping, design of highway infrastructure, and many other purposes across Montana. The USGS Wyoming-Montana Water Science Center has an ongoing project working to update peak-flow frequency estimates at USGS streamgages across the state.
Yellow SCREE expedition raft in Browns Park, Green River.
The yellow raft of SCREE expedition leader, Tom Minckley, floating through calm waters of Browns Park National Wildlife Refuge, Colorado. The far bank in the midground of the photo are the exposed sediments of the pre-dam floodplain of the Green River. The layers of rock in the background are the exposed layers of the red Uinta Mountain Group quartzite.
Entering Swallow Canyon of the Green River
View looking downstream at the red sandstone walls of Swallow Canyon. This small canyon is one of two canyons that divide Browns Park into series of intermittent alluvial-meandering and bedrock canyon segments. Unlike Red Canyon and Lodore Canyon, the slope of Swallow Canyon is not controlled by debris flows, and thus does not have any rapids.
View looking downstream at the red sandstone walls of Swallow Canyon. This small canyon is one of two canyons that divide Browns Park into series of intermittent alluvial-meandering and bedrock canyon segments. Unlike Red Canyon and Lodore Canyon, the slope of Swallow Canyon is not controlled by debris flows, and thus does not have any rapids.
Storm on the horizon, Browns Park, Green River.
View looking upstream from a raft on the Green River at the downstream end of Swinging Bridge Canyon, near Flynn Bottom. The eastern end of the Unita Mountains lie in the background. A pump station supplying water to the flooded wetlands of Brown's Park National Wildlife Refuge can be seen on the right near the edge of water.
View looking upstream from a raft on the Green River at the downstream end of Swinging Bridge Canyon, near Flynn Bottom. The eastern end of the Unita Mountains lie in the background. A pump station supplying water to the flooded wetlands of Brown's Park National Wildlife Refuge can be seen on the right near the edge of water.
Sandbar in a side channel, Browns Park, Green River.
View looking at a shallow side channel of the Green River in Brown's Park, Colorado. The picture is taken looking downstream from the left bank of the river. In the foreground and on the opposite bank are stands of sandbar willow (Salix exigua). Further beyond, are stands of Fremont cottonwood (Populus fremontii).
View looking at a shallow side channel of the Green River in Brown's Park, Colorado. The picture is taken looking downstream from the left bank of the river. In the foreground and on the opposite bank are stands of sandbar willow (Salix exigua). Further beyond, are stands of Fremont cottonwood (Populus fremontii).
Looking down on camp at Big Pine, Red Canyon.
The photo shows the SCREE Powell 150 expdition camp at Big Pine Campground in Red Canyon of the Green River, Utah. The large green tarp was set up to keep the kitchen area and campers dry. Two very large ponderosa pines are in the center of camp, and surely were witness to the 1869 Powell expedition.
The photo shows the SCREE Powell 150 expdition camp at Big Pine Campground in Red Canyon of the Green River, Utah. The large green tarp was set up to keep the kitchen area and campers dry. Two very large ponderosa pines are in the center of camp, and surely were witness to the 1869 Powell expedition.
SCREE boatwoman rowing Red Canyon in the rain
This photo demonstrates one of the challenges of down-river boating in the Colorado River system.
This photo demonstrates one of the challenges of down-river boating in the Colorado River system.
A small tributary adding water and sediment to the Green River, Red Ca
This photo displays the contrast between the clear, sediment-starved waters released from a large dam, and the murky, sediment-rich waters of natural tributaries. The tributary is just one of many that gradually re-supply the river with sediment.
This photo displays the contrast between the clear, sediment-starved waters released from a large dam, and the murky, sediment-rich waters of natural tributaries. The tributary is just one of many that gradually re-supply the river with sediment.
Bat call and insect data collection in Red Canyon.
This photo demonstrates the typical set up of the so-called 'bat-and-bug' citizen science data collection platform used on the SCREE - Powell 150 expedition. The UV light attracts bugs to the pool of ethanol, where they land and are preserved for identification, while the touchpad device has an untrasonic microphone to collect bat calls.
This photo demonstrates the typical set up of the so-called 'bat-and-bug' citizen science data collection platform used on the SCREE - Powell 150 expedition. The UV light attracts bugs to the pool of ethanol, where they land and are preserved for identification, while the touchpad device has an untrasonic microphone to collect bat calls.
Science and Products
Wyoming Landscape Conservation Initiative: Water Resources
The Wyoming Landscape Conservation Initiative is a long-term science-based effort to assess and enhance aquatic and terrestrial habitats at a landscape scale in southwest Wyoming, while facilitating responsible development through local collaboration and partnerships. The WLCI is an interagency working group of partners that is beginning the process of establishing a much larger coalition of...
Characterizing Hydrologic and Geomorphic Processes in a Spring-Fed, Cold-Desert Headwater Stream
The role of natural versus human-influenced factors in sedimentation of Littlefield Creek, a small, high-desert creek in south-central Wyoming is currently unknown. In general, there is little empirical information about both hydrologic and geomorphic processes (together described as hydrogeomorphic) in these types of streams. To develop a better understanding of hydrogeomorphic processes, their...
Peak-Flow Frequency Analysis for Selected Montana Streamgages
Peak-flow frequency information is needed for flood-plain mapping, design of highway infrastructure, and many other purposes across Montana. The USGS Wyoming-Montana Water Science Center has an ongoing project working to update peak-flow frequency estimates at USGS streamgages across the state.
Yellow SCREE expedition raft in Browns Park, Green River.
The yellow raft of SCREE expedition leader, Tom Minckley, floating through calm waters of Browns Park National Wildlife Refuge, Colorado. The far bank in the midground of the photo are the exposed sediments of the pre-dam floodplain of the Green River. The layers of rock in the background are the exposed layers of the red Uinta Mountain Group quartzite.
The yellow raft of SCREE expedition leader, Tom Minckley, floating through calm waters of Browns Park National Wildlife Refuge, Colorado. The far bank in the midground of the photo are the exposed sediments of the pre-dam floodplain of the Green River. The layers of rock in the background are the exposed layers of the red Uinta Mountain Group quartzite.
Entering Swallow Canyon of the Green River
View looking downstream at the red sandstone walls of Swallow Canyon. This small canyon is one of two canyons that divide Browns Park into series of intermittent alluvial-meandering and bedrock canyon segments. Unlike Red Canyon and Lodore Canyon, the slope of Swallow Canyon is not controlled by debris flows, and thus does not have any rapids.
View looking downstream at the red sandstone walls of Swallow Canyon. This small canyon is one of two canyons that divide Browns Park into series of intermittent alluvial-meandering and bedrock canyon segments. Unlike Red Canyon and Lodore Canyon, the slope of Swallow Canyon is not controlled by debris flows, and thus does not have any rapids.
Storm on the horizon, Browns Park, Green River.
View looking upstream from a raft on the Green River at the downstream end of Swinging Bridge Canyon, near Flynn Bottom. The eastern end of the Unita Mountains lie in the background. A pump station supplying water to the flooded wetlands of Brown's Park National Wildlife Refuge can be seen on the right near the edge of water.
View looking upstream from a raft on the Green River at the downstream end of Swinging Bridge Canyon, near Flynn Bottom. The eastern end of the Unita Mountains lie in the background. A pump station supplying water to the flooded wetlands of Brown's Park National Wildlife Refuge can be seen on the right near the edge of water.
Sandbar in a side channel, Browns Park, Green River.
View looking at a shallow side channel of the Green River in Brown's Park, Colorado. The picture is taken looking downstream from the left bank of the river. In the foreground and on the opposite bank are stands of sandbar willow (Salix exigua). Further beyond, are stands of Fremont cottonwood (Populus fremontii).
View looking at a shallow side channel of the Green River in Brown's Park, Colorado. The picture is taken looking downstream from the left bank of the river. In the foreground and on the opposite bank are stands of sandbar willow (Salix exigua). Further beyond, are stands of Fremont cottonwood (Populus fremontii).
Looking down on camp at Big Pine, Red Canyon.
The photo shows the SCREE Powell 150 expdition camp at Big Pine Campground in Red Canyon of the Green River, Utah. The large green tarp was set up to keep the kitchen area and campers dry. Two very large ponderosa pines are in the center of camp, and surely were witness to the 1869 Powell expedition.
The photo shows the SCREE Powell 150 expdition camp at Big Pine Campground in Red Canyon of the Green River, Utah. The large green tarp was set up to keep the kitchen area and campers dry. Two very large ponderosa pines are in the center of camp, and surely were witness to the 1869 Powell expedition.
SCREE boatwoman rowing Red Canyon in the rain
This photo demonstrates one of the challenges of down-river boating in the Colorado River system.
This photo demonstrates one of the challenges of down-river boating in the Colorado River system.
A small tributary adding water and sediment to the Green River, Red Ca
This photo displays the contrast between the clear, sediment-starved waters released from a large dam, and the murky, sediment-rich waters of natural tributaries. The tributary is just one of many that gradually re-supply the river with sediment.
This photo displays the contrast between the clear, sediment-starved waters released from a large dam, and the murky, sediment-rich waters of natural tributaries. The tributary is just one of many that gradually re-supply the river with sediment.
Bat call and insect data collection in Red Canyon.
This photo demonstrates the typical set up of the so-called 'bat-and-bug' citizen science data collection platform used on the SCREE - Powell 150 expedition. The UV light attracts bugs to the pool of ethanol, where they land and are preserved for identification, while the touchpad device has an untrasonic microphone to collect bat calls.
This photo demonstrates the typical set up of the so-called 'bat-and-bug' citizen science data collection platform used on the SCREE - Powell 150 expedition. The UV light attracts bugs to the pool of ethanol, where they land and are preserved for identification, while the touchpad device has an untrasonic microphone to collect bat calls.