长江科学院院报2024，Vol.41Issue(12)：57-65,9.DOI:10.11988/ckyyb.20230814
地形因子尺度效应及其对水力侵蚀估算的影响研究进展
Scaling Effects of Topographic Factors and Its Influence on Soil Water Erosion Estimation:A Review
摘要
Abstract
Topography significantly affects soil erosion,and topographic factors are key parameters in water erosion models.Topographic factors in existing modelling of regional soil erosion are mostly extracted from medium and low resolution DEMs,resulting in under-estimated slope gradient and over-estimated slope length,significantly affecting water erosion estimations.This study reviews the research progresses in the scaling effects of topographic factors and the associated effects on water erosion estimations.Results showed that the scaling effect of topographic factors wide-ly exists in different terrain type areas,but the laws of slope attenuation and slope length expansion are quite differ-ent.These scaling effects are influenced by terrain complexity,spatial frequency of terrain information,calculation methods,and truncation techniques.The sensitivity of slope gradient and slope length factors to digital elevation model(DEM)resolution varies by region,leading to differential impacts on water erosion estimations.While scien-tists have made considerable achievements in elucidating the fundamental laws of slope gradient attenuation and slope length expansion,several critical areas need to be further explored,including the mechanisms underlying slope gradient attenuation and slope length expansion,the coupling mechanisms of slope gradient and slope length factor scaling effects,the impact of topographic alterations caused by human activities on scaling effects,the regional appli-cability,geomorphological principles,and the uncertainty analysis of topographic factor transformation models.关键词
地形因子/DEM/尺度效应/水力侵蚀估算/研究综述Key words
topographic factors/DEM/scaling effects/water erosion estimation/literature review分类
农业科技引用本文复制引用
卢刚,王兴连,艾克拜尔·热合木吐拉,马惟杨,王一峰,孙宝洋,李力..地形因子尺度效应及其对水力侵蚀估算的影响研究进展[J].长江科学院院报,2024,41(12):57-65,9.基金项目
新疆水利科技项目专项经费项目(XSKJ-2023-14) （XSKJ-2023-14）
国家重点研发计划项目(2022YFF1302901) （2022YFF1302901）
国家自然科学基金项目(42107353) （42107353）
长江科学院基本科研业务费项目(CKSF2023340/TB) （CKSF2023340/TB）
