[Construction and application of a coupled slope surface-subsurface flow model for forested watershed].
A coupled slope surface-subsurface flow model which can be solved by finite difference method was constructed with saturated infiltration theory, Saint-Venant equation, and Richards equation, and a series of slope runoff generation experiments under conditions of different slope grades and rain intensities were conducted in laboratory. The results showed that the simulated and observed processes of surface-subsurface flow accorded well, with the relative errors of peak time, flow duration, peak flow, and gross flow being mostly less than 10%. This precise and practicable model could be used in further studying the mechanisms of subsurface flow and in providing theoretical basis for improving rainfall-runoff watershed models.
Zheng
Kan
K
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. znkan@163.com
Jin
Chang-Jie
CJ
Wang
An-Zhi
AZ
Guan
De-Xin
DX
Pei
Tie-Fan
TF
D017753:Ecosystem; D008962:Models, Theoretical; D011891:Rain; D015203:Reproducibility of Results; D012987:Soil / Q000032:analysis*; D014197:Trees / Q000502:physiology*; D014867:Water / Q000032:analysis; D014872:Water Movements
D012987:Soil; D014867:Water