Estimated freshwater withdrawals in Washington, 2010

Abstract

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Water budget of the upper Chehalis River Basin, southwestern Washington

“…Averaged across the basin, these groundwater withdrawals were 0.06 and 0.05 in/yr for Group A wells and Group B/self-supply domestic wells, respectively. The total irrigated area of the upper Chehalis River Basin was estimated at 5,997 acres and irrigated at an estimated rate of 1.42 ft/yr (Lane and Welch, 2015). Averaged across the upper Chehalis River Basin, total irrigation was estimated at 0.18 in/yr with 55 percent of irrigation (0.10 in/yr) sourced from groundwater (Lane and Welch, 2015).…”

“…The total irrigated area of the upper Chehalis River Basin was estimated at 5,997 acres and irrigated at an estimated rate of 1.42 ft/yr (Lane and Welch, 2015). Averaged across the upper Chehalis River Basin, total irrigation was estimated at 0.18 in/yr with 55 percent of irrigation (0.10 in/yr) sourced from groundwater (Lane and Welch, 2015). The combined groundwater pumpage from Group A and B public supply, domestic self-supply, and irrigation wells was 0.21 in., which is 1 percent of groundwater recharge estimated by SWB and 0.8 percent of recharge estimated from base flow calculated from hydrograph separation by HYSEP (table 3-Group A well pumpage + Self-supply and Group B well pumpage + Irrigation well pumpage).…”

“…Unlike Group A systems, Group B and self-supply systems were not required to report pumpage rates to the Washington State Department of Health; therefore, water-use estimates were based on 2005 and 2010 per-capita water-use rates for Lewis and Thurston counties reported by Lane (2009) and Lane and Welch (2015). Total irrigation withdrawals were estimated by determining the area of irrigated agricultural land from the Washington State Department of Agriculture agricultural land use geodatabase (Washington State Department of Agriculture, 2018) and multiplying by the irrigation application rate for Lewis County (17.04 in/yr) reported by Lane and Welch (2015). Irrigation was separated into its groundwater component by multiplying the fraction of Lewis County irrigation from groundwater pumpage (0.55) reported by Lane and Welch (2015).…”

“…Total irrigation withdrawals were estimated by determining the area of irrigated agricultural land from the Washington State Department of Agriculture agricultural land use geodatabase (Washington State Department of Agriculture, 2018) and multiplying by the irrigation application rate for Lewis County (17.04 in/yr) reported by Lane and Welch (2015). Irrigation was separated into its groundwater component by multiplying the fraction of Lewis County irrigation from groundwater pumpage (0.55) reported by Lane and Welch (2015).…”

Hydrogeologic framework, groundwater movement, and water budget in the Puyallup River Watershed and vicinity, Pierce and King Counties, Washington

“…Self-supplied domestic groundwater withdrawals (1,500 acre-ft) were estimated using the Group B per capita water use rate of 88 gal/d and an estimate of the self-supplied population in the area (Washington State Office of Financial Management, 2014). Other self-supplied groundwater withdrawals (6,800 acre-ft) that typically include activities associated with livestock production, aquaculture, industrial processes, and mining, were estimated from groundwater withdrawal and use data collected by the USGS (Lane, 2015). Groundwater withdrawals for the irrigation of agricultural crops and pastures (6,000 acre-ft) were estimated using an application rate of 1.20 acre-ft/yr (Lane, 2015) and 5,000 acres of irrigated crop and pasture lands in the area (Washington State Department of Agriculture, 2014).…”