TY - JOUR AU - X.-S., Wang AU - M.-G., Ma AU - X., Li AU - J., Zhao AU - P., Dong AU - J., Zhou PY - 2010 DA - 2010// TI - Groundwater response to leakage of surface water through a thick vadose zone in the middle reaches area of Heihe River Basin, in China JO - Hydrology and Earth System Sciences VL - 14 IS - 117 AB - The behavior of groundwater response to leakage of surface water in themiddle reaches area of Heihe River Basin is significantly influenced by athick vadose zone. The groundwater regime is a result of two recharge eventsdue to leakage of Heihe River and irrigation water with differentdelay time. A nonlinear leakage model is developed to calculate the monthlyleakage of Heihe River in considering changes of streamflow, river stage andagricultural water utilization. Numerical modeling of variable saturatedflow is carried out to investigate the general behaviors of leakage-rechargeconversion through a thick vadose zone. It is found that the rechargepattern can be approximated by simple reservoir models of leakages under ariver and under an irrigation district with different delay-time andrecession coefficient. A triple-reservoir model of relationship betweensurface water, vadose zone and groundwater is developed. It reproduces thegroundwater regime during 1989–2006 with variable streamflow of Heihe Riverand agric... SN - 1607-7938 ID - X.-S.2010 ER -