额济纳绿洲植被恢复潜力研究  

Study on Vegetation Restoration Potential in Ejina Oasis

作　　者：李凯 高喆 廉耀康 董国涛 畅祥生 LI Kai;GAO Zhe;LIAN Yaokang;DONG Guotao;CHANG Xiangsheng(Heihe Water Resources and Ecological Protection Research Center,Lanzhou 730030,China;Heihe Ejina Water Resources and Ecological Protection Research Center,Alashan 735400,China)

机构地区：[1]黑河水资源与生态保护研究中心,甘肃兰州730030 [2]黑河额济纳水资源与生态保护研究中心,内蒙古阿拉善735400

出　　处：《人民黄河》2024年第8期94-98,共5页Yellow River

基　　金：国家社会科学基金资助项目(23&ZD104);阿拉善盟科技计划项目(AMKJ2023-07);甘肃省陇原青年英才项目(YJZX-2022-07-01)。

摘　　要：为分析黑河尾闾额济纳绿洲生态治理效果及未来植被恢复潜力,基于2000—2020年MOD13Q1数据集提取归一化植被指数(NDVI),运用Sen斜率估计和M-K检验分析了额济纳绿洲植被时空变化特征,并利用像元二分模型、相似生境法探讨了额济纳绿洲植被覆盖度、未来植被恢复潜力。结果表明:2000—2020年NDVI呈增大趋势,增长速率为0.001 3/a,季节尺度上春季NDVI呈显著增大趋势的面积占比最大;额济纳旗政府所在地附近植被覆盖度较高,研究期内西河中游区域植被覆盖度增长明显;未来植被仍呈现两河周边高、绿洲边缘低的空间分布格局,黑河尾闾湖泊周边等已经接近或达到最大植被恢复潜力,八道河至天鹅湖河道、七道河尾部河道、四道河与六道河河道尾部以及西河下段西部等区域植被提升潜力较大。In order to analyze the ecological management effect and future vegetation restoration potential of Ejina Oasis at the tail of the Heihe River,Normalized Difference Vegetation Index(NDVI)was extracted based on the MOD13Q1 data set from 2000 to 2020.This paper used Sen trend and M-K test to analyze the spatiotemporal variation characteristics of vegetation in the Ejina Oasis.Considering the factors of topography,geomorphology,hydrology,soil and vegetation type,the similar habitat method was used to explore the potential and spatial pat-tern of oasis vegetation restoration.The results show that NDVI shows an increasing trend from 2000 to 2020,and the annual growth rate is 0.0013/a.The proportion of areas with a significant increase in NDVI in spring on a seasonal scale is the highest.The vegetation coverage near the Ejina Banner government is relatively high and the vegetation coverage in the middle reaches of Xihe River increases significantly during the study period.In the future,the vegetation will still show a spatial distribution pattern of high around the two rivers and low at the edge of Ejina Oasis.The lower reaches of the surrounding areas of the tail lake are close to or have reached the maximum recovery potential.The vegetation enhancement potential of Badaohe to Swan Lake channel,Qidaohe tail channel,Sidaohe and Liudaohe tail channel and the west of Xihe lower section are great.

关 键 词：NDVI 植被覆盖度 时空变化 植被恢复潜力 额济纳绿洲 

分 类 号：TV211.11[水利工程—水文学及水资源]