期刊
WATER RESOURCES RESEARCH
卷 40, 期 11, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2004WR003218
关键词
catchment hydrology; distributed hydrological model; multiple resolution; runoff generation; streamflow; triangulated irregular network (TIN)
This study explores various aspects of catchment hydrology based on a mechanistic modeling of distributed watershed processes. A new physics-based, distributed-parameter hydrological model that uses an irregular spatial discretization is introduced. The model accounts, on a continuous basis, for the processes of rainfall interception, evapotranspiration, moisture dynamics in the unsaturated and saturated zones, and runoff routing. Simulations of several mid- to large-sized watersheds (similar to10(3) km(2)) highlight various dynamic relationships between the vadose zone-groundwater processes and their dependence on the land surface characteristics. It is argued that the model inferences can be used for interpretation of distributed relationships in a catchment. By exploiting a multiple-resolution representation, the hydrologic features of the watershed terrain are captured with only 5-10% of the original grid nodes. This computational efficiency suggests the feasibility of the operational use of fully distributed, physics-based models for large watersheds.
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