论文部分内容阅读
本文结合ＧＩＳ和流域土壤侵蚀模型，对流域单次降雨侵蚀过程进行动态模拟研究。首先概述土壤侵蚀模型与ＧＩＳ结合的三种方式和特点；其次介绍地理信息系统ＰＣＲａｓｔｅｒ 的空间动态模型语言及其表达方法、命令函数和动态模型的逻辑组成，以及使用该语言实现的与ＧＩＳ完全结合的流域水文和土壤侵蚀动态模型－ ＬＩＳＥＭ 模型；最后分析用ＰＣＲａｓｔｅｒ 系统和ＬＩＳＥＭ 模型对黄土高原小流域次降雨过程进行动态模拟的实验结果，认为模型计算的总径流量和总土壤流失量具有较高的精度，模拟的径流过程线符合黄土高原小流域超渗产流的实际情况
In this paper, a dynamic simulation study of single rainfall erosion process in watershed is carried out based on GIS and watershed soil erosion model. First of all, it summarizes the three ways and characteristics of combining soil erosion model with GIS. Secondly, it introduces the spatial dynamic model language of GISaster’s PCRaster and its logical expression, the logical composition of command function and dynamic model, The LISEM model was used to analyze the hydrological and soil erosion dynamics in the basin. Finally, the experimental results of the dynamic simulation of the sub-rainfall process in the small watershed of the Loess Plateau using the PCRaster system and the LISEM model were analyzed. The calculated total runoff and total soil loss were higher The accuracy of simulated runoff process line is consistent with the actual situation of the ultra-seepage flow in the small watershed on the Loess Plateau