AUTOMATED METHODS FOR ESTIMATING BASEFLOW AND GROUND WATER RECHARGE FROM STREAMFLOW RECORDS

摘要: ABSTRACT: To quantify and model the natural ground water recharge process, six sites located in midwest eastern United States where previous balance observations had been made were compared to computerized techniques estimate: (1) base flow (2) recharge. Results from an existing automated digital filter technique for separating baseflow daily streamflow records estimates studies. Previous validation of separation consisted only comparisons with manual techniques. In this study, was found compare well measured field yielding a monthly coefficient determination 0.86. The algorithm developed study is derivation Rorabaugh hydrograph recession curve displacement method that utilizes streamflow. Comparison annual measurements those computed coefficients 0.76 predictive efficiencies 71 percent. Monthly showed more variation are not advocated use method. These appear be fast, reproducible methods estimating should useful regional modeling efforts as quick check on mass shallow table aquifers.