湑水河流域植被覆盖度变化分析  

Analysis on the Change of Vegetation Coverage in the Yanshui River Basin

作　　者：王浩祥 梁爽 Wang Haoxiang;Liang Shuang(Shaanxi Provincial Institute of Water Resources and Electric Power Investigation and Design,Xi'an 710001,Shanxi)

机构地区：[1]陕西省水利电力勘测设计研究院(集团)有限公司,陕西西安710001

出　　处：《陕西水利》2025年第3期110-112,116,共4页Shaanxi Water Resources

摘　　要：以湑水河流域为研究对象,基于2013年、2017年和2021年Landsat8 OLI遥感影像,采用NDVI(归一化植被指数)和像元二分法对研究区域2013年~2021年FVC(植被覆盖度)进行计算分析。结果表明:湑水河流域在2013年、2017年和2021年NDVI均值分别为0.3076、0.7517和0.8343,FVC以高覆盖度为主,占比为54.62%、75.50%和86.13%。流域上中游和下游FVC呈现不同变化趋势,上中游以高覆盖度为主且不断增加,下游以中、低、极低覆盖度为主且极低覆盖度增加最为显著,流域植被覆盖度变化符合其发展规律。Taking the Yanshui River Basin as the research object,based on the Landsat8 OLI remote sensing images in 2013,2017 and 2021,the NDVI(normalized difference vegetation index)and pixel dichotomy method were used to calculate and analyze the FVC(vegetation coverage)of the study area from 2013 to 2021.The results show that the average NDVI values of the Yanshui River Basin in 2013,2017 and 2021 were 0.3076,0.7517 and 0.8343,respectively,and the FVC was mainly high coverage,accounting for 54.62%,75.50%and 86.13%.The FVC in the upper,middle and lower reaches of the basin showed different trends.The upper and middle reaches were mainly high coverage and continued to increase,while the lower reaches were mainly medium,low and very low coverage,and the increase in very low coverage was the most significant.The change in vegetation coverage in the basin conforms to its development law.

关 键 词：湑水河流域 NDVI FVC 变化分析 

分 类 号：X171.4[环境科学与工程—环境科学]