水土保持研究2024，Vol.31Issue(2)：122-129,8.DOI:10.13869/j.cnki.rswc.2024.02.022
黄土高原典型流域水蚀因子多重分形特征
Multifractal Characteristics of Water Erosion Factors in Typical Watershed of the Loess Plateau
摘要
Abstract
[Objective]The multi-fractal characteristics of water erosion factors such as elevation,slope,land use and vegetation coverage are explored in order to deeply understand the water erosion mechanism of the Loess Plateau.[Methods]The watersheds in tow typical regions(Wangdonggou Watershed of Changwu County and Nihegou Watershed of Chunhua County,Quanjiagou Watershed of Mizhi County and Zhifanggou Watershed of Ansai County which are located in the highland and gully region and hilly and gully region,respectively)were taken as examples.The multifractal spectrum of the water erosion factor and its main parameters were calculated and analyzed by the multifractal method.The multifractal characteristics of the water erosion factor were discussed.[Results]The singulation indexΔαvalues of the slope and land use were 0.817 and 0.310,respectively,while the largest difference in vegetation coverage was observed in the Quanjiagou Watershed,where the vegetation cover was Δα=1.309,the elevation of the loess hilly gully area was Δf(α)<0,and Δα and Δf(α)of the slope of the loess highland and gully area was greater than that of the hilly ravine.That was,the relative undulations of hilly and ravines were greater,the surface of the landform was sharper,the land use fragmentation was more serious,and the complexity of vegetation coverage areas was high.[Conclusion]The relative relief degree and land use fragmentation were greater in Wangdonggou Basin,and the complexity of vegetation cover in Quanjiagou Basin was the highest,which was consistent with the actual situation.It was feasible to carry out multi-fractal characteristics analysis of water erosion factors quantification in the region.关键词
水蚀因子/多重分形/高原沟壑区/丘陵沟壑区/小流域Key words
water erosion factor/multifractal/highland and gully region/hilly and gully region/small watershed分类
天文与地球科学引用本文复制引用
李莹莹,魏舟,童亚文,张青峰..黄土高原典型流域水蚀因子多重分形特征[J].水土保持研究,2024,31(2):122-129,8.基金项目
陕西省自然科学基础研究计划(2021JZ-17) （2021JZ-17）
国家自然科学基金(41701239) （41701239）
