干旱区研究2026，Vol.43Issue(2)：313-324,12.DOI:10.13866/j.azr.2026.02.09
基于Landsat影像的黄河砒砂岩区植被地形耦合效应
Vegetation topographic coupling effect in the Yellow River arsenic sandstone area based on Landsat images
摘要
Abstract
Research on the dynamic changes in vegetation coverage and itscoupling effect with terrain factors can provide theoretical support for vegetation restoration in the Yellow River arsenic sandstone area,a fragile ecologi-cal environment affected by severe erosion.We examined the vegetation coverage characteristics and trends in the Yellow River arsenic sandstone area over the past 25 years using Landsat series data and linear regression analysis.Terrain data were used to explore the coupling law of vegetation coverage for terrain factors such as ele-vation,slope,slope direction,and topographic index,and combined with geographic detectors to reveal the driv-ing mechanism of terrain factors on vegetation coverage.(1)From 2000 to 2024,the average vegetation coverage in the Yellow River arsenic sandstone area was between 0.34 and 0.52,showing an overall upward trend;(2)Veg-etation coverage was generally high in the soil-covered and sand-covered areas and low in exposed arsenic sand-stone areas;(3)With increasing altitude and slope,vegetation coverage in the arsenic sandstone areas showed a trend of initial increase followed by a decrease,reaching the maximum at 1200-1300 m and 5°-15°,respectively,and showing strong fluctuation;in terms of topographical position,vegetation was mainly distributed at the medi-um topographical position between 0.38 and 0.7;(4)The factors driving vegetation coverage were ranked in the following descending order based on their degree of influence:elevation>slope>topographic index>slope direc-tion.The relationship between any two factors was nonlinear enhanced,with the largest q value(0.22)being ob-served for elevation vs.topographic index.The overall vegetation coverage in the Yellow River arsenic sandstone area is currently increasing,and the coupling effect with topographic factors is obvious.The results of this study provide scientific support for precise vegetation allocation in the Yellow River arsenic sandstone area,contribut-ing to the high-quality development of the Yellow River Basin.关键词
砒砂岩/植被覆盖度/时空分异/地形效应/地理探测器Key words
arsenic sandstone/vegetation coverage/spatial-temporal difference/terrain effect/geodetic detector引用本文复制引用
张璐,彭彬,徐佳怡,韩珈琦,杨文杰,王咏..基于Landsat影像的黄河砒砂岩区植被地形耦合效应[J].干旱区研究,2026,43(2):313-324,12.基金项目
国家自然科学基金项目(32101591) （32101591）
河南省科技攻关项目(232102321108) （232102321108）
