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GIS-based modeling of Soil and Water Loss Process at regional scale

机译:基于GIS的区域水土流失过程建模

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摘要

Studying the dynamic process of soil and water loss at regional scale was of great importance to understanding the effects of soil erosion on environmental factors and the relationship between global change and regional soil erosion. In this study, a set of algorithms for cell models were designed, with which the related process of runoff, erosion and sediment yield were calculated.The result was applied in Yanhe River basin and regional soil and water loess process was modeled. The results showed that all of the modules designed can function well. The output maps could characterize the soil erosion in Yanhe River properly; the spatial pattern and structure depicted by the map were accordant with the practical situation. The soil erosion in Yanhe River was mainly influenced by land using and climatic factors at macro scale, and by terrain microrelief at micro scale. The simulation results were comparatively accordant with the practical situation.
机译:研究区域尺度水土流失的动态过程,对于理解土壤侵蚀对环境因素的影响以及全球变化与区域土壤侵蚀之间的关系具有重要意义。本研究设计了一套细胞模型算法,计算了径流,侵蚀和产沙量的相关过程,并将其应用于延河流域,并对区域水土黄土过程进行了建模。结果表明,所有设计的模块都可以正常运行。输出图可以恰当地刻画延河水土流失的特征。地图所描绘的空间格局和结构与实际情况相符。延河水土流失主要受宏观尺度土地利用和气候因素的影响,以及微观尺度地形微尺度的影响。仿真结果与实际情况比较吻合。

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