干旱区研究2025，Vol.42Issue(6)：1114-1125,12.DOI:10.13866/j.azr.2025.06.14
古浪县八步沙区域生态环境质量变化
Change in the ecological environment quality in Babusha region in the Gulang County
摘要
Abstract
Located in the convergence zone of the Qinghai-Xizang Plateau Ecological Barrier and the Northern Sand Control Belt,the Babusha region acts as a frontline defense against the southward encroachment of the Tengger Desert.Assessing changes in the ecological environment quality in the Babusha region holds significant value for evaluating the effectiveness of regional desertification control and advancing the Three-North Shelter-belt Development Program.This study used data from the Google Earth Engine platform to investigate land use pattern changes in the Babusha region from 1986 to 2021.A comprehensive assessment of the spatiotemporal changes in the regional ecological environment quality was conducted using the normalized difference vegetation index(NDVI),desertification index(DI),and remote sensing ecological index(RSEI).The results were as fol-lows:(1)Over time,the desert area in the Babusha region has continued to decrease,the grassland area has pro-gressively increased,and the vegetation coverage has improved.From 1986 to 2021,NDVI and RSEI showed a fluctuating upward trend,with NDVI increasing from 0.14 to 0.31(>50%increase)and RSEI increasing from 0.22 to 0.24(9.39%increase).In contrast,DI exhibited a fluctuating downward trend,decreasing from 0.79 to 0.57 with a cumulative reduction of 27.85%.(2)Areas with high NDVI and RSEI values were concentrated in the southern and northwestern parts of the study region,dominated by woodland and cultivated land,whereas areas with low NDVI and RSEI values were distributed in the northern region characterized by extremely low vegeta-tion coverage and desert.(3)The trend analysis primarily revealed a nonsignificant or significant increase in ND-VI and RSEI values and a nonsignificant decrease in DI values.Specifically,12.12%and 61.10%of the study ar-ea exhibited a nonsignificant and significant increase in NDVI,respectively,whereas 5.06%and 38.63%of the study area showed a nonsignificant and significant increase in RSEI,respectively.The ecological improvement ar-eas were concentrated in the northwestern and southeastern regions with higher human activity levels.From 1986 to 2021,the Babusha region demonstrated marked vegetation restoration,sustained improvement in the ecologi-cal environment,and significantly effective desertification control,facilitating the establishment of a replicable Babusha model.关键词
生态环境质量/植被覆盖度/遥感生态指数/时空变化/八步沙Key words
ecological environment quality/vegetation coverage/remote sensing ecological index(RSEI)/spa-tiotemporal variation/Babusha引用本文复制引用
魏倩,马全林,赵锐锋..古浪县八步沙区域生态环境质量变化[J].干旱区研究,2025,42(6):1114-1125,12.基金项目
国家自然科学基金项目(32160410) （32160410）
中央财政林业科技推广示范项目(2021ZYTG002) （2021ZYTG002）
甘肃省防沙治沙科技创新项目(2023-ZS-01) （2023-ZS-01）
