呼盟水蚀区不同土地利用的水土流失观测与分析

不同的土地利用是影响水土流失的重要因素。以呼盟水蚀区宝龙泉小流域为观测基地，通过对不同土地利用条件下的降水量和与之相对应的径流观测小区的径流量、土壤冲刷量的观测分析，说明了顺垅坡耕地、横垅坡耕地、荒坡、梯田、次生林地在相同的自然条件下，土壤流失量存在着较大的区别，同时径流量与土壤冲刷量之间存在着正相关关系，为呼盟水蚀区的水土流失预防和治理提供科学依据。

Observations and Analyses on the Soil Erosion by Different Land Uses in the Erodible Regions in Hulunbeier League

Different types of land uses are the main reason to cause soil erosion. By taking the Baolongquan small basin in Hulunbeier League erodible region as an observation base, the analyses on the relationship among the precipitation, runoff, and soil erosion under different land uses are conducted. The results show that the soil erosion depends greatly on land uses, such as cultivated land along ridges, cultivated land across ridges, uncultivated slope fields, terraced fields, and the secondary forest land. In addition, the results indicate that the soil erosion is directly proportional to the rain runoff. These findings may provide a scientific basis for the prevention and management of the soil in the erodible region in Hulunbeier League.