沂蒙山区典型县土壤可蚀性K值空间变异研究

发布时间：2018-01-24 11:24

本文关键词： K值 EPIC模型克里金插值空间异质性　出处：《土壤通报》2017年02期 　论文类型：期刊论文

【摘要】：土壤可蚀性是一个相对概念,在时间、空间等方面呈现异质性特征,选取蒙阴县和沂水县为研究区域,采用EPIC模型中K值计算方法,以地统计学原理为指导,基于Arc GIS地统计模块,探讨了沂蒙山区典型县土壤可蚀性空间分布特征,为区域土壤侵蚀评价提供数据支撑。结果表明:(1)研究区土壤可蚀性K值变化范围为0.1057~0.3776,属中等变异,以中低可蚀性土壤分布最广;在分布最广的粗骨土土类中,石灰岩钙质粗骨土K值最大,为中高可蚀性土壤,存在较大的侵蚀危险性。(2)蒙阴县西北部区域为低可蚀性土壤,中部和东南部为中可蚀性及以上土壤;沂水县土壤主要为中低可蚀性,而南部、西北及东北部存在中高及高可蚀性土壤;两县相接区域土壤为中可蚀性及以上土壤。(3)同一土类而不同土地利用呈现异质性特征,不同土地利用K值大小依次为园地耕地林地草地。(4)随着海拔高度增大,土壤可蚀性K值呈逐渐减小趋势。
[Abstract]:Soil erodibility is a relative concept, showing heterogeneity in time, space and other aspects. Mengyin and Yishui counties are selected as the study area, and the calculation method of K value in EPIC model is adopted. Based on the geostatistics principle and Arc GIS geostatistics module, the spatial distribution characteristics of soil erodibility in typical counties in Yimeng Mountain area were discussed. The results showed that the K value of soil erodibility in the study area ranged from 0.1057 to 0.3776, which was a moderate variation. The soil with low and middle erodibility is the most widely distributed. Among the most widely distributed coarse bony soils, limestone calcareous coarse bone soil has the highest K value, which is medium and high erodible soil, and there is a great erosion risk. 2) the northwest area of Mengyin County is low erodible soil. The middle and southeastern part of the soil is medium erodibility and above; The soil in Yishui County is mainly middle and low erodible, while in the south, northwest and northeast there are middle and high erodibility soils. The soils of the two counties are middle erodibility and above soil. 3) the same soil type and different land use show heterogeneity characteristics. K value of different land use was in order of garden land, woodland, grassland and grassland.) with the increase of altitude, K value of soil erodibility decreased gradually.
【作者单位】：山东省土壤侵蚀与生态修复重点实验室山东泰山森林生态系统国家定位研究站山东农业大学林学院;南京林业大学;淮河水利委员会淮河流域水土保持监测中心站;
【基金】：山东省自然科学基金(BS2015DX014) 水利部“全国水土流失动态监测与公告项目—沂蒙山国家级重点治理区水土流失动态监测”(HWSBJ2012001)资助
【分类号】：S157.1
【正文快照】： 荆莎莎,张荣华,张庆红,刘霞,邱冠军,李欢,于全波.沂蒙山区典型县土壤可蚀性K值空间变异研究[J].土壤通报,2017,48(2):278-284JING Sha-sha,ZHANG Rong-hua,ZHANG Qing-hong,LIU Xia,QIU Guan-jun,LI Huan,YU Quan-bo.Spatial Variability on KValue of Soil Erodibility in Ty

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