黄土高原水-土-植被系统土壤侵蚀模型研究  

Research on Soil Erosion under the Changes of Water-Soil-Plant System in Loess Plateau Typical Area

作　　者：汪明霞[1,2,3] 程林[2,3] 王卫东[1,2] 

机构地区：[1]水利部黄土高原水土流失过程与控制重点实验室,河南郑州450003 [2]黄河水利职业技术学院水资源工程系,河南开封475001 [3]区域水土资源高效利用研究中心,河南开封475001

出　　处：《人民黄河》2013年第9期89-91,共3页Yellow River

基　　金：水利部黄土高原水土流失过程与控制重点实验室开放课题基金资助项目(201205);河南省教育厅自然科学研究计划项目(2011B570007);黄河水利职业技术学院科研基金项目(2013KXJS005;2013KXJS006)

摘　　要：根据1954—1986年黄土高塬南小河沟人工草地和自然草地径流场小区观测资料，分析了水－土－植被耦合情况下降雨与土壤侵蚀量的关系，结果表明土壤侵蚀是草地坡度、植被盖度、降雨强度等综合因子共同作用的结果，据此提出了在综合因子影响下的西峰地区草业用地侵蚀量预测经验模型。研究发现，40%~60%植被覆盖度是植被对土壤侵蚀起明显干预作用的分界区间，因此西峰地区人工草地植被覆盖度不宜小于60%。Based on the artificial grassland and natural grassland runoff field data from1954 to 1986 in Xifeng Station, this paper analyzed the relation- ship between rainfall and soil erosion under the soil-plant-water interaction system. The resuhs show that soil erosion is the combined action of the grass slope, vegetation coverage, rainfall intensity, and other comprehensive factors, Antieipatexl empirical model on water and soil erosion for grass land in Xifeng for soil erosion are educed under rainfall. Meanwhile the results show that 40% - 60% vegetation coverage is severe boundary interval of decreasing soil erosion, therefore, the vegetation coverage of artificial grassland in Xifeng the vegetation coverage should not be less than 60%.

关 键 词：土壤侵蚀 植被覆盖度 典型小区 黄土高原 

分 类 号：S157.1[农业科学—土壤学]