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Areas where groundwater depletion is a concern are in the Umatilla area, and the Palouse slope. In the Umatilla area, total decline since the 1970s is from 300 ft to 100 ft of water height. Overall, between 1968-2009, mean groundwater decline across the aquifer system was at 1.0 ft/year. [1]
The Willamette valley is home to 70% of Oregon's population, with the aquifer supplying water for agricultural, domestic, and industrial purposes. Reported in 2005, the total water use from the aquifer was 1.6 hm 3 (420 million gallons) per day, with 58% going to irrigation, 24% to public supply, and 18% to industrial use. [ 3 ]
Aquifers of the United States Withdrawal rates from the Ogallala Aquifer.. This is a list of some aquifers in the United States.. Map of major US aquifers by rock type. An aquifer is a geologic formation, a group of formations, or a part of a formation that contains sufficient saturated permeable material to yield significant quantities of water to groundwater wells and springs.
Oregon and Washington. 6,250 sq mi (16,200 km 2) HUC1708: 1709 Willamette subregion: The Willamette River Basin. Oregon: 11,400 sq mi (30,000 km 2) HUC1709: 1710 Oregon–Washington Coastal subregion: The drainage into the drainage boundary to the Smith River Basin boundary, excluding the Columbia River Basin. California, Oregon, and Washington.
On the new map, the American West stands out as particularly reliant on a network of underground water sources — like the hidden water that honeycombs the land around and to the south of Utah ...
The task of defining and mapping these ecoregions was carried out by the Oregon Ecoregion Project, a collaborative effort involving the EPA, the United States Geological Survey (USGS), the United States Forest Service (USFS), and other state and federal agencies. The new classification system they developed may differ from previous frameworks ...
This is a list of Superfund sites in Washington State designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental law. The CERCLA federal law of 1980 authorized the United States Environmental Protection Agency (EPA) to create a list of polluted locations requiring a long-term response to ...
Mill Creek is a 36.5-mile (58.7 km) long [3] tributary of the Walla Walla River, flowing through southeast Washington and northeast Oregon in the United States. It drains from the western side of the Blue Mountains into the Walla Walla Valley and flows through the city of Walla Walla, which draws most of its water supply from the creek.