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Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. These general purpose regions are critical for structuring and implementing ecosystem management strategies across federal agencies, state agencies, and nongovernment organizations that are responsible for different types of resources within the same geographical areas. The approach used to compile this map is based on the premise that ecological regions can be identified through the analysis of patterns of biotic and abiotic phenomena, including...
Our mission is to collect timely and reliable information on the water resources of our six-state region (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont), and to partner with Federal, State, Tribal, and local agencies in hydrologic studies that advance human health, public safety, and environmental sustainability.
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This data release provides a monthly irrigation water use reanalysis for the period 2000-20 for all USGS Watershed Boundary Dataset of Subwatersheds (HUC12) in the conterminous United States (CONUS). Results include reference evapotranspiration (ETo), actual evapotranspiration (ETa), irrigated areas, consumptive use, and effective precipitation for each HUC12. ETo and ETa were estimated using the operational Simplified Surface Energy Balance (SSEBop, Senay and others, 2013; Senay and others, 2020) model executed in the OpenET (Melton and others, 2021) web-based application implemented in Google Earth Engine. Results provided by OpenET/SSEBop were summarized to hydrologic response units (HRUs) in the National Hydrologic...
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Research at the Pacific Island Ecosystems Research Center focuses on providing the scientific understanding and technologies needed to support and implement sound management and conservation of our Nation's biological resources occurring in Hawai'i and other Pacific island locations.


    map background search result map search result map Pacific Island Ecosystems Research Center Southwest Energy Development and Drought USGS New England Water Science Center USGS - G3 EMRI Airborne Geophysical Survey Hub Irrigation water use reanalysis for the 2000-20 period by HUC12, month, and year for the conterminous United States USGS New England Water Science Center Southwest Energy Development and Drought Pacific Island Ecosystems Research Center Irrigation water use reanalysis for the 2000-20 period by HUC12, month, and year for the conterminous United States USGS - G3 EMRI Airborne Geophysical Survey Hub