广西壮族自治区土地利用与土壤侵蚀的关系
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国家自然科学基金项目“北部湾沿海地区森林转型及水土流失效应研究:以南流江流域为例”(41661043);广西自然科学基金(2015GXNSFAA139234);国家重点基础研究计划(973计划)项目(2015CB452700)


Relationship Between Land Use and Soil Erosion in Guangxi Zhuang Autonomous Region
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    摘要:

    [目的]对广西壮族自治区的土壤侵蚀现状进行定量分析,分析土地利用类型与土壤侵蚀的关系,为科学防治土壤侵蚀提供决策依据。[方法]以RUSLE模型为基础,引入喀斯特石漠化修正因子M,构建适合广西地区的土壤侵蚀模型。[结果]①2015年,研究区土壤侵蚀模数为135.51 t/(km2·a),土壤侵蚀厚度达0.08 mm/a,土壤侵蚀面积2.52×104 km2,土壤侵蚀量3.21×107 t。其中,喀斯特地区土壤侵蚀面积1.86×104 km2,占土壤侵蚀面积的73.81%,占总侵蚀量的31.01%。②土壤侵蚀量占总侵蚀量的大小顺序为:耕地(37.58%) > 林地(30.94%) > 草地(16.10%) > 园地(6.39%) > 工矿用地(4.09%) > 裸地(2.16%)。[结论]人类活动干扰强烈的土地利用影响全区土壤侵蚀空间分布格局。

    Abstract:

    [Objective] This study aims to quantitatively analyze the state of soil erosion in Guangxi Zhuang Autonomous Region, especially on the relationship between soil erosion and land uses and provides a basis for scientific control of soil erosion.[Methods] Based on RUSLE model, the modification factor M of karst rocky desertification was introduced to construct the soil erosion model suitable for Guangxi Zhuang Autonomous Region.[Results] ① In 2015, the soil erosion modulus of the region was 135.51 t/(km2·a). The soil erosion thickness was 0.08 (mm/a). The soil erosion area was 2.52×104 km2, and the soil loss was 3.21×107 t, of which the soil erosion area of karst area was 1.86×104 km2, accounting for 73.81% of the soil erosion area and 31.01% of total soil loss. ② The percentage of soil loss from different land uses in total soil loss was:cultivated land(37.58%) > woodland(30.94%) > grassland(16.10%) > garden land(6.39%) > industrial and mining land(4.09%) > bare land(2.16%).[Conclusion] The land use changes induced by human interferences have greatly affected the spatial pattern of soil erosion in the whole area.

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刘警鉴,卢远,刘斌涛,华璀.广西壮族自治区土地利用与土壤侵蚀的关系[J].水土保持通报,2018,38(1):41-46

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历史
  • 收稿日期:2017-07-24
  • 最后修改日期:2017-09-14
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  • 在线发布日期: 2018-03-08
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