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黄土高原的土壤侵蚀过程可以被看做是一种地形演变的复杂系统。元胞自动机是一种能够很好的体现这样复杂现象的理论模型,因其非线性的特点使得其在土壤侵蚀的预测方面相比其他模型能够有一定的优势。本文利用元胞自动机的思想对于在降雨条件下的土壤侵蚀过程进行探究。利用每个单位元胞内的水量平衡和泥沙平衡构建元胞之间各参数的转换规则,利用D8流向算法计算水流方向。综合得出一种基于水量平衡与泥沙平衡的土壤侵蚀元胞自动机转换规则框架,并利用netlogo建模环境来实现模型,得出了较好的模拟结果。
The soil erosion process in the Loess Plateau can be considered as a complex system of terrain evolution. Cellular automaton is a kind of theoretical model that can well represent such a complex phenomenon. Because of its nonlinear characteristics, Cellular Automata has certain advantages over other models in predicting soil erosion. In this paper, the idea of cellular automata is used to explore the process of soil erosion under rainfall conditions. The conversion rule of each parameter between cells was constructed using the balance of water volume and sediment balance within each unit cell, and the direction of water flow was calculated by D8 flow algorithm. A framework of soil erosion cellular automata transformation based on water balance and sediment balance is obtained. The netlogo modeling environment is used to realize the model and a good simulation result is obtained.