| Simulating spatial distribution of precipitation over the Loess Plateau based on macro-geographical factors |
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| DOI：10.7606/j.issn.1000-7601.2011.01.43 |
| Key Words: macro-geographical factors precipitation the Loess Plateau spatialization |
| Author Name | Affiliation | | SHEN Hong | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | LIU Wenzhao | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, State Key Laboratory of Soil Erosion and Dryland Farming in the Loess Plateau, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Based on three macro-geographical factors, latitude, longitude and elevation, regression models were built for precipitation across the Loess Plateau by adopting trend surface model, stepwise regression analysis and residual interpolation. Through significant tests for the regression models and station validation for the simulations, the results showed that the spatial difference of annual precipitation over the Loess Plateau is largely determined by the three geographical factors involved in this study, and the models were able to be used to depict the fundamental characteristics of spatial precipitation over the Loess Plateau. Ac
cording to the simulations, the annual precipitation across the Loess Plateau appeared to have remarkable differences, where a clearly downward tendency from southeast to northwest could be seen. The prevailing climate pattern there is semi-arid and semi-humid climate, which takes control of more than 85 percent of the total area. In most regions, the annual precipitation mainly varies ranging from 250 mm to 800 mm. |
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