water Article Understanding of Storm Runoff Generation in a Weathered, Fractured Granitoid Headwater Catchment in Northern China Sihan Zhao 1 , Hongchang Hu 1, Ciaran J. Harman 2 , Fuqiang Tian 1,*, Qiang Tie 1, Yaping Liu 3 and Zhenyang Peng 4 1 Department of Hydraulic Engineering, State ...