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Precipitation and Hydrologic Abstractions
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analysis annual aquifer average basin boundary coefficient components computed correlation curve Darcy's law density depth determine developed direct runoff distribution drainage area drainage basin drawdown duration equation estimate evaporation evapotranspiration example factors flood frequency function given graph groundwater heat hydraulic hydro hydrologic infiltration infiltration capacity inflow input interval isohyetal matrix mean melt method moisture monthly normal O.OO outflow parameters peak discharge percent period plot precipitation probability radiation ratio record region regression relationship reservoir River routing runoff curve shown in Fig simulation skewness slope snow snowmelt snowpack soil solution specific humidity spillway standard deviation statistical storage storm streamflow surface runoff Table techniques temperature tion U.S. Army U.S. Army Corps U.S. Geological Survey U.S. Weather Bureau unit hydrograph values vapor pressure variables variations velocity water vapor watershed