俱战省,张加兵,柏子昌

• 1:宝鸡文理学院地理与环境学院陕西省灾害监测与机理模拟重点实验室
• 2:万源市水土保持局

摘要(Abstract)：

针对当前以县域为统计单元的坡谱研究较少,且难以满足区域尺度上水土流失地形因子指标的选取等问题,该文采用数字地形分析方法提取山区各县域的坡谱和坡长坡度因子(LS因子),并探讨坡谱信息熵与LS因子之间的关系。实验表明:地貌的差异决定了各县域坡谱曲线的差异,具体可分为L型、S型和钟型。坡谱信息熵变化范围为1.709～2.667nat,反映了地形起伏由平缓到强烈的变化趋势;LS因子平均值介于2.72～18.61之间,在一定程度上表征土壤流失量的大小。坡谱信息熵与LS因子关系拟合良好(R2=0.963 6,P<0.05),结论可为坡谱信息熵在区域水土流失地形因子的建立及应用提供参考。

关键词(KeyWords)： 坡谱;坡谱信息熵;坡度坡长因子;水土流失;山区

Abstract:

Keywords:

基金项目(Foundation): 国家“973”项目(2015CB452704);; 宝鸡文理学院校级重点项目(ZK16063)

作者(Author): 俱战省,张加兵,柏子昌

DOI: 10.16251/j.cnki.1009-2307.2019.03.014

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