GeoAPEXOL, a web GIS interface for the Agricultural Policy Environmental eXtender (APEX) model enabling both field and small watershed simulation

Qingyu Feng1, Bernard A Engel2, Dennis C Flanagan3, Lei Yang1 and Liding Chen4, (1)CAS Chinese Academy of Sciences, Research Center for Eco-Environmental Sciences (RCEES), Beijng, China, (2)Purdue University, Agricultural & Biological Engineering, West Lafayette, IN, United States, (3)USDA-Agricultural Research Service, National Soil Erosion Research Laboratory, West Lafayette, IN, United States, (4)Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China