Modeling the surface water and groundwater budgets of the US using MODFLOW-OWHM

摘要: Abstract Assessments of groundwater and surface water budgets at a large scale, such as the contiguous United States, often separately analyze complex dynamics linking subsurface categories resources. These include recharge contributions to streamflow. The time-varying simulation these hydrologic dynamics, across spatial temporal scales, remains scientific challenge due complexity processes data availability. In this study, fluxes are simulated US for 1950-2010. estimates monthly budget components, recharge, runoff, evapotranspiration; streamflow in major rivers is routed while accounting exchange. Human impacts included through pumping, climate variability included, including precipitation, temperature potential evapotranspiration. level river discharge have strong correlation with USGS observation wells gages, R2 values 0.992 0.946, respectively. evapotranspiration compared three other published estimation methods, showing that it able capture magnitude seasonality over Mississippi River basin. As such, model reasonably simulate US, allowing questions relative importance human be explored future.