Drainage area threshold as a parameter for controlling spatial hillslope discretization in basins

作者：Yang Fen^*; Wang Zhongjing; Zhao Jianshi

来源：Journal of Tsinghua University(Science and Technology), 2010, 50(3): 380-382.

• Basin discretizaiton
• Drainage area threshold
• GBHM (geomorphology-based hydrological model)
• Multi fractals
• Width function

The drainage area threshold controls the resolution of the basin discretization when the hillslope-based GBHM (geomorphology-based hydrological model) model is used for hydrological simulations. This paper describes a multi-fractal method based on analyses of the river slope and the drainage density developed from analyses of the geomorphological properties of various basins. In this method, the drainage area threshold is first determined by traditional methods, then the relative optimal scope is determined using the multi-fractal method. The results applied to the Chao and Bai River basins of the upper Miyun Reservoir show that appropriate drainage area thresholds for both basins are 0.675 km2 for use in the watershed GBHM model.

• 出版日期2010
• 单位清华大学