江淮丘陵区土壤侵蚀分布与环境因子的关系
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水利部淮河水利委员会水土保持管理科技项目“淮河流域江淮丘陵区水土流失问题与综合治理技术调查”(HWSBC2016001);山东省自然科学基金(BS2015DX014)


Relationships Between Soil Erosion Distribution and Environmental Factors in Jianghuai Hilly Region
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    摘要:

    [目的]掌握江淮丘陵区土壤侵蚀分布及其与土地利用类型、坡度、植被、土壤类型等环境因子的关系,为确定水土保持重点区域,开展水土保持规划、制定有针对性的水土流失防治措施提供依据。[方法]以淮河流域江淮丘陵区为研究区,以2015年15 m分辨率的Landsat 8影像为基础信息源,基于"3S"技术平台,采用综合评判法和实地调查验证相结合的研究方法,开展土壤侵蚀空间分布及其与土地利用类型、植被、坡度、土壤类型等环境因子关系的研究。[结果]①江淮丘陵区水土流失面积为1 409.60 km2,约占总面积的10.20%,侵蚀强度以轻度侵蚀为主,局部以中度侵蚀为主。②不同土地利用类型下,土壤侵蚀主要发生在下垫面起伏度较大、条件较为恶劣的坡耕地,以及坡度相对较大、植被盖度较差的林地和荒草坡中;不同坡度下,主要发生在5°~15°的山区与平原的交界带;不同植被覆盖度下,主要发生在45%~75%的地区;不同土壤类型下,主要发生在暗色土、水稻土以及黄棕壤等土壤类型中。[结论]土地利用类型、坡度、植被、土壤类型等环境因子与淮河流域江淮丘陵区土壤侵蚀分布关系紧密,坡耕地、坡度起伏较大、植被覆盖较低、土壤抗蚀性较差等下垫面更容易发生土壤侵蚀。

    Abstract:

    [Objective] To provide support for selecting priority areas and making plans for soil and water conservation and developing the targeted soil erosion measures, this study analyzed the spatial distribution of the soil erosion in the Jianghuai hilly region, and explained the relationship between soil erosion and environmental factors such as land use type, slope, vegetation and soil type.[Methods] Based on the Landsat 8 image with 15 m resolution in 2015 and the "3S" technology platform, this study used the comprehensive evaluation method and the field investigation verification method to analyze the soil erosion distribution and its relationship with the environmental factors.[Results] ① The soil erosion area in Jianghuai hilly region was 1 409.60 km2, accounting for 10.20% of the total area. And the erosion intensity was characterized with light erosion and moderate erosion in some areas. ② Under different land use types, the soil erosion occured mainly in the sloping farmland with larger topographic relief and relatively poor condition, as well as in woodland and grassland with relatively steep slopes and low vegetation coverage. The soil erosion was mainly occurred in the slope of 5°~15° in the boundary belt between mountains and plains. In terms of coverage, the soil erosion mainly occurred in areas with vegetation coverage of 45%~75%. Under different soil types, soil erosion easily occurred in dark soil, paddy soil and yellow brown soil because of low viscosity of soil layer, low organic matter content and low erosion resistance.[Conclusion] There is a close relationship between the soil erosion and the environmental factors such as land use type, slope, vegetation, soil type in the Jianghuai hilly region in the Huaihe River basin. And the area with sloping farmland, steep slope, low vegetation coverage, poor soil anti-erodibility is prone to soil erosion.

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刘晓华,刘潘伟,胡续礼,张荣华,张光灿,杨锐,吴畏.江淮丘陵区土壤侵蚀分布与环境因子的关系[J].水土保持通报,2018,38(1):281-286

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  • 收稿日期:2017-08-09
  • 最后修改日期:2017-09-03
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  • 在线发布日期: 2018-03-08
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