湖北省土壤侵蚀量模拟及其在吸附态氮、磷量匡算中的应用

采用美国通用USLE(土壤流失方程)作为建立侵蚀模型的基本理论，使用GIS等空间信息技术作为研究的技术平台，对湖北省进行了多年(1989—2008年)平均土壤侵蚀量的模拟，并对模拟结果进行验证. 利用土壤普查资料获得氮、磷营养物含量，进行多年平均吸附态氮、磷量模拟.结果: ①研究并建立了湖北省多年平均状况土壤侵蚀模型. 利用USLE和栅格计算方法得到的土壤侵蚀强度等级大体上可以与水利部土壤侵蚀遥感数据相当，存在显著相关关系，由此验证了所建立的湖北省土壤侵蚀模型的可行性. ②对湖北省吸附态氮、磷负荷进行的模拟结果显示，土壤吸附态氮、磷负荷整体结构与土壤侵蚀量分布规律相似，以长江、江汉盆地为输沙沉积中心，分别从南、北向中部，由西向东依次下降. 

Simulation of Soil Erosion and Its Application in the Assessment of Absorbed Nitrogen and Phosphorus Load in Hubei Province

USLE(Universal Soil Loss Equation) as a fundamental theory and GIS technique as a technical platform were used in this study for simulating soil erosion of normal value of accumulated year(1989-2008) in Hubei Province,and the simulated results were tested and verified.The contents of nutrients such as N and P were obtained,and average absorbed nitrogen and phosphorus load simulation over many years was conducted from the soil survey material.We obtained the following results: 1) A mean status soil erosion m...