Pedosphere 11(3): 271--282, 2001
ISSN 1002-0160/CN 32-1315/P
©2001 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| A dynamic model for simulating atmospheric, surface and soil water interactions in hillslopes of loess area under natural conditions and its application |
| ZHANG Shu-Han1, KANG Shao-Zhong1, CAI Huan-Jie1 and NIE Guang-Yong2 |
1 Institute of Agricultural Soil-Water Engineering, Northwestern Agricultural University, Yangling 712100 (China)
2 Inner Mongolia institute of Water Conservancy, Huhhot 010020 (China) |
| ABSTRACT |
| The mechanism of atmospheric, surface and soil water interactions (water transformation) in hillslope under natural conditions was analyzed, and a dynamic model was developed to simulate infiltration, overland flow and soil water movement during natural rainfall in hillslope, by bringing forward concepts such as rainfall intensity on slope and a correction coefficient of saturated soil water content for soil surface seal. Some factors, including slope angle, slope orientation and raindrop inclination, which affect the rainfall amount on slope, were taken into account while developing the dynamic model. The effect of surface seal on infiltration and water balance under a boundary condition of the second kind was also considered. Application of the model in a field experiment showed that the model simulated precisely the infiltration, overland flow and soil water movement in hillslope under natural rainfall conditions. |
| Key Words: dynamic model, hillslope, infiltration, soil water content, water transformation |
| Citation: Zhang, S. H., Kang, S. Z., Cai, H. J. and Nie, G. Y. 2001. A dynamic model for simulating atmospheric, surface and soil water interactions in hillslopes of loess area under natural conditions and its application. Pedosphere. 11(3): 271-282. |
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