干旱区地理2025，Vol.48Issue(2)：223-233,11.DOI:10.12118/j.issn.1000-6060.2024.262
基于分形理论的陇东地区沟谷发育特征及影响因素分析
Developmental characteristics and influencing factors of gullies based on fractal theory in eastern Gansu Province
摘要
Abstract
The Loess Plateau,characterized by soil highly susceptible to erosion from flowing water,frequently experiences gully backward erosion,leading to reduced arable land and a series of geologic hazards.Using high-resolution remote sensing imagery and DEM,the gully network and its characteristic parameters were extracted to analyze the interaction relationships and development characteristics of gullies.The complexity of gully ero-sion and development was comprehensively evaluated through the box dimension of the watershed gully and the boundary dimension of the gully ridgeline.Additionally,the development process and spatial distribution patterns of erosion in the gully watershed were examined based on the box and boundary dimensions.The results demon-strated that:(1)In secondary-level valley development,there exists a 110° developable interval on one down-stream side.(2)Watershed b exhibits the most complex erosion development,followed by watershed a,and then watershed c;along valley slopes,watershed b has the most intricate boundary dimension,followed by watershed a,and then watershed c.The degree of watershed gully erosion increases from southwest to northeast for water-shed c.(3)Geological structure significantly influences the degree of gully development,with higher elevation,thinner loess thickness,sparser vegetation,and greater gully erosion.This study offers guiding recommendations for soil and water conservation management in eastern Gansu Province.关键词
沟谷发育/遥感解译/分形理论/影响因素/陇东地区Key words
gully development/remote sensing interpretation/fractal theory/influencing factors/eastern Gansu Province引用本文复制引用
唐延东,臧翠萍,于云鹏,余青霖..基于分形理论的陇东地区沟谷发育特征及影响因素分析[J].干旱区地理,2025,48(2):223-233,11.基金项目
四川省自然科学基金(2023NSFSC0789)资助 （2023NSFSC0789）
