陕西省黄土高原沟道侵蚀分析研究

Analysis of Gully Erosion in the Loess Plateau of Shaanxi Province

利用水利普查数据、地理国情监测数据、数字高程模型和遥感影像数据进行了陕西省黄土高原沟道侵蚀评价分析,获取了侵蚀沟道分布规律、土壤侵蚀强度等级和沟道侵蚀强度。结果表明,研究区内侵蚀沟道的面积和侵蚀沟长由南向北逐渐减小;土壤侵蚀强度等级每上升一个等级,面积比例约减少一半,北纬37°是侵蚀最高峰;沟道侵蚀强度主要集中于中度、重度和强烈侵蚀,其中重度侵蚀沟道最多,且呈明显的正态分布特征。

The gully erosion in the loess plateau of Shaanxi Province was evaluated and analyzed with the data of water resources survey, geographical situation monitoring, digital elevation model and remote sensing image data, and the conclusions of the gully erosion distribution law,soil erosion intensity grade and gully erosion intensity were obtained. The results show that the three research contents show obvious distribution rules from the aspects of quantity and space distribution. The area and length of erosion gully in the study area gradually decreased from south to north. Soil erosion intensity level increased by one grade. The area ratio reduced by half. 37 degrees north latitude was the peak of erosion. Channel erosion intensity was mainly concentrated in moderate, severe and intense erosion, and the most severe erosion channel showed obvious normal distribution characteristics.