Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Western Geographic Science Center images.
Photographs of Natural Infrastructure in Dryland Streams (NIDS), including a. leaky weir, b. sandbag dams, c. wood log jams, and d. gabions
Photographs of Natural Infrastructure in Dryland Streams (NIDS), including a. leaky weir, b. sandbag dams, c. wood log jams, and d. gabions
An illustration of a mountain with water flowing from the top down to a river with smaller rivers flowing off the sides. Multiple items appear along the various rivers including leaky weirs, one rock dams, log dams, gabions, check dams, trincheras, and earthen berms. Informational bubbles appear alongside these various item in the illustration.
An illustration of a mountain with water flowing from the top down to a river with smaller rivers flowing off the sides. Multiple items appear along the various rivers including leaky weirs, one rock dams, log dams, gabions, check dams, trincheras, and earthen berms. Informational bubbles appear alongside these various item in the illustration.
The opening screen for a video about the Re-greening a dryland watershed. T.e study took place in Arizona.
The opening screen for a video about the Re-greening a dryland watershed. T.e study took place in Arizona.
Mapping drainages in the Chiricahua Mountains impacted by large rain events.
Mapping drainages in the Chiricahua Mountains impacted by large rain events.
Figure 4. Chloe Fandel’s Master Thesis. Sierra Vista sub-basin aquifer using rainwater harvesting in the tributaries of the San Pedro River using low-technology methods. Research is being conducted on the Babacomari Ranch.
Figure 4. Chloe Fandel’s Master Thesis. Sierra Vista sub-basin aquifer using rainwater harvesting in the tributaries of the San Pedro River using low-technology methods. Research is being conducted on the Babacomari Ranch.
A photograph of a hillside where a fire came though and destroyed the vegetation.
A photograph of a hillside where a fire came though and destroyed the vegetation.
A) Post-wildfire 1.2 cm orthoimage draped on a digital terrain model showing a study site that burned in the 2020 LNU Lightning Complex fire, and B) pre-fire lidar canopy height data showing the vegetation structure of the site.
A) Post-wildfire 1.2 cm orthoimage draped on a digital terrain model showing a study site that burned in the 2020 LNU Lightning Complex fire, and B) pre-fire lidar canopy height data showing the vegetation structure of the site.
A) USGS UAS pilot Sky Corbett collecting true color imagery from a UAS mounted Ricoh GRII sensor to generate orthoimagery and digital surface models in 2020, and B) Joe Adams calibrating the multispectral MicaSense sensor used to gather information on vegetation and soils in 2022, two years after the fire occurrence
A) USGS UAS pilot Sky Corbett collecting true color imagery from a UAS mounted Ricoh GRII sensor to generate orthoimagery and digital surface models in 2020, and B) Joe Adams calibrating the multispectral MicaSense sensor used to gather information on vegetation and soils in 2022, two years after the fire occurrence
Babocomari fig 6 Figure 6. Post weirs installed by BR, with Laura Norman, Natalie Wilson, and James Callegary (USGS) in the field.
Babocomari fig 6 Figure 6. Post weirs installed by BR, with Laura Norman, Natalie Wilson, and James Callegary (USGS) in the field.
Mapping drainages in the Chiricahua Mountains impacted by large rain events.
Mapping drainages in the Chiricahua Mountains impacted by large rain events.
Field plots used to evaluate fine-scale soil burn serveity to calibrate and validate image classifications from Unoccupied Aerial Systems (UAS). Photograph on the left is from the 1st year after fire, and the photograph on the right is from the second year after fire.
Field plots used to evaluate fine-scale soil burn serveity to calibrate and validate image classifications from Unoccupied Aerial Systems (UAS). Photograph on the left is from the 1st year after fire, and the photograph on the right is from the second year after fire.
Drawings by Chloé Fandel, Graduate Student at the University of Arizona.
Drawings by Chloé Fandel, Graduate Student at the University of Arizona.
Dr. Laura Norman has been selected as the 2021 winner of the William C. Ackermann Medal for Excellence in Water Management by the American Water Resources Association (ARWA) Board of Directors and its members.
Dr. Laura Norman has been selected as the 2021 winner of the William C. Ackermann Medal for Excellence in Water Management by the American Water Resources Association (ARWA) Board of Directors and its members.
This is a map of the Sky Islands of Madrean Archipelago. It is located in Arizona and New Mexico in the United States and in Sonora and Chihuahua in Mexico.
This is a map of the Sky Islands of Madrean Archipelago. It is located in Arizona and New Mexico in the United States and in Sonora and Chihuahua in Mexico.
The confluence of the Sacramento River and San Joaquin River (CA) undergoes considerable intra-annual changes in surface water inundation. The example illustrates the difference between maximum 2017 inundation (January-March) to lower levels of inundation towards the end of the calendar year.
The confluence of the Sacramento River and San Joaquin River (CA) undergoes considerable intra-annual changes in surface water inundation. The example illustrates the difference between maximum 2017 inundation (January-March) to lower levels of inundation towards the end of the calendar year.
USGS Scientists published a StoryMap showing projected changes in land use, flooded area, and wildlife habitat in California’s Central Valley for five scenarios of future climate and water management.
USGS Scientists published a StoryMap showing projected changes in land use, flooded area, and wildlife habitat in California’s Central Valley for five scenarios of future climate and water management.
A very high, high, medium, low, and very low liquefaction susceptibility map of the San Francisco Bay area. The graphic was made using data from Witter et. al, 2006.
A very high, high, medium, low, and very low liquefaction susceptibility map of the San Francisco Bay area. The graphic was made using data from Witter et. al, 2006.
Picture of the Rosemont hills showing grasses and shrubs with clouds in the background.
Picture of the Rosemont hills showing grasses and shrubs with clouds in the background.
A mallard bathes in the waters of Sacramento National Wildlife Refuge. Source: Mike Peters, US Fish and Wildlife Service. Public Domain.
A mallard bathes in the waters of Sacramento National Wildlife Refuge. Source: Mike Peters, US Fish and Wildlife Service. Public Domain.
Rock gabion installed in arroyo in La Paz, Baja California Sur. (Laura Norman, USGS)
Rock gabion installed in arroyo in La Paz, Baja California Sur. (Laura Norman, USGS)
A conceptual model of ecosystem services for the wetland habitats of Nisqually River Delta. Exogenous factors influence the quality and quantity of wetland habitat. This, in turn, controls the many functions that occur within wetlands. Ecosystem services, or benefits to people, are derived from the ability of wetlands to perform critical ecological functions.
A conceptual model of ecosystem services for the wetland habitats of Nisqually River Delta. Exogenous factors influence the quality and quantity of wetland habitat. This, in turn, controls the many functions that occur within wetlands. Ecosystem services, or benefits to people, are derived from the ability of wetlands to perform critical ecological functions.