普定岩溶区水土流失与土壤漏失模式研究
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国家973计划项目“西南喀斯特山地石漠化与适应性生态系统调控”子课题“西南喀斯特山地土壤侵蚀过程与水土流失危险度评价”(2006CB403203)


Models of Soil and Water Loss and Soil Leakage in Puding Karst Area
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    摘要:

    普定县是贵州省水土流失比较严重的地区之一,水土流失面积占全县总面积的60.8%,土壤年侵蚀模数高达4422.3t/(km2·a)。通过现场调查,对该地区地形特征、岩性特点和水文条件进行综合分析。结果表明,岩溶裂隙、落水洞及地下暗河发育是造成水土流失的主要因素。对岩溶区水土流失与土壤漏失模式进行了概化,探讨了水土流失过程中雨滴溅蚀、坡面侵蚀、落水洞漏失及地下暗河运移之间的关系,从理论上分析了岩溶区水土流失的作用机理,对该地区水土流失防治具有一定的指导意义。

    Abstract:

    Puding County is one of the most serious regions suffering from soil and water loss in Guizhou Province.The area of soil and water loss in the county is 60.8% of the total land area and the soil erosion modulus is 4422.3t/(km2·a).The development of karst fissure,sinkhole,and underground river is found to be the main factor of soil and water loss through analyzing the field data,topographic characteristics,lithologic features,and hydrological condition.The models of soil and water loss and karst leakage are generalized and the relationships among raindrop splash,slope erosion,sinkhole leakage,and underground river transport in the processes of soil and water loss are studied.The mechanisms of soil and water loss in karst area are analyzed as well.The study has a certain signification to prevent soil and water loss in this area.

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周念清,李彩霞,江思珉,唐益群.普定岩溶区水土流失与土壤漏失模式研究[J].水土保持通报,2009,(1):7-11

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  • 收稿日期:2008-07-31
  • 最后修改日期:2008-09-25
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  • 在线发布日期: 2014-11-26
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