A geomorphology-based semi-distributed watershed model

A semi-distributed watershed model was developed that conceptualizes the ca tchment as a cascade of nonlinear storage elements whose geometric dimensio ns are derived from the Horton-Strahler ordering of the stream network. Eac h storage element represents quick storm runoff over land or in a channel s egment. The physically based groundwater submodel is parameterized through the application of the Brutsaert-Nieber recession flow analysis and it prov ides continuous baseflow separation. The model requires the calibration of seven parameters from a one year rainfall-runoff record. It was tested on t he Mahantango Creek watershed in the Susquehanna River basin, Pennsylvania. (C) 1999 Elsevier Science Ltd. All rights reserved.