J Integr Plant Biol. ›› 1997, Vol. 39 ›› Issue (2): -.

• Research Articles •    

A Model of Precipitation Redistribution Within a Three-Leveled Sandy Grassland Landscape

Gao Qiong and Zhang Xin-shi   

Abstract: The authors presented a simple model of precipitation redistribution within a threeleveled (hard ridge, soft hill and lower land) sandy grassland landscape. The model assumed that when the soil water is smaller than field capacity, redistribution flow is negligible. However, when precipitation rate is large enough and soil water goes beyond the field capacity, the excessive soil water will flow laterally to the lower levels through noncapillary pores. Exponential distribution of precipitation was assumed and tested with real data. Then based on the exponential distribution of precipitation the model was solved to give the equivalent precipitation of each level in the landscape.

Key words: Sandy grassland, Precipitation redistribution, Landscape ecology

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