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Annual water budget from Environmental Policy Integrated Climate (EPIC) simulations over the conterminous United States (CONUS). Area-weighted average precipitation, evapotranspiration (ET), runoff (surface and subsurface including tile drainage), and percolation are for all agricultural production areas (177,588,407.5 ha). Area-weighted average irrigation demand is for the irrigated areas (22,788,210.8 ha). Note that return flow is not simulated in this version of the system.
