黄河流域上中游地区土壤侵蚀潜在危险度及抗侵蚀潜力特征  

Characteristics of soil erosion potential hazard and anti-erosion potential in the area of upper and middle reaches of Yellow River

作　　者：李秀霞[1] 韩鹏[1] 倪晋仁[1] 

机构地区：[1]北京大学环境工程系水沙科学教育部重点实验室,北京100871

出　　处：《水利学报》2009年第3期303-310,共8页Journal of Hydraulic Engineering

基　　金：国家重点基础研究发展计划资助(2007CB407202)

摘　　要：根据黄河流域有效土层厚度,分析了在不同侵蚀强度下流域上中游地区的潜在侵蚀危险度,进一步预测了该区域对不同侵蚀强度的抗侵蚀潜力,并将其划分为很低、低、中等、较高、高5个级别。结果表明,黄河流域上中游区在不同侵蚀强度下,抗侵蚀潜力的变化范围在很低—较高级别之间。在中度侵蚀和强度侵蚀条件下,抗侵蚀潜力处于较高级别;在极强侵蚀条件下,抗侵蚀潜力属于"低"级别,此时该区域的侵蚀状况已经很严重,处于高侵蚀强度和高危险度状态;剧烈侵蚀时,区域侵蚀状况进一步恶化。通过比较分析表明,抗侵蚀潜力综合考虑了土壤侵蚀强度和潜在危险度双重指标,较传统的单一指标能更全面的反映区域土壤侵蚀状况,能够为黄河流域上中游区水土保持和可持续发展规划提供合理的决策支持。According to the effective soil thickness data obtained by remote sensing,different scenarios of soil erosion potential under different soil erosion intensity in the area of upper and middle reaches of Yellow River are studied.The corresponding anti-erosion potential for difierent erosion scenarios is predicted and classified into five levels,including very low,low,medium,high and very high.The results indicate that the anti-erosion potential level in the area of upper and middle reaches of Yellow River is ...

关 键 词：土壤侵蚀 潜在危险度 抗侵蚀潜力 黄河流域 

分 类 号：S157[农业科学—土壤学]