那棱格勒河流域植被变化对生态水文的响应  

Response of vegetation changes to ecological hydrology in Nalenggele River Basin

作　　者：赵慧芳[1,2] 张永兴 校瑞香 李晓东[1,2] 李素雲 孙玮婕[1,2] ZHAO Hui-fang;ZHANG Yong-xing;XIAO Rui-xiang;LI Xiao-dong;LI Su-yun;SUN Wei-jie(Qinghai Institute of Meteorological Science,Xining 810001,China;Qinghai Provincial Key Laboratory of Disaster Prevention and Reduction,Xining 810001,China;Xining Comprehensive Natural Resources Survey Center,China Geological Survey,Xining 810001,China)

机构地区：[1]青海省气象科学研究所,青海西宁810001 [2]青海省防灾救灾重点实验室,青海西宁810001 [3]中国地质调查局西宁自然资源综合调查中心,青海西宁810001

出　　处：《青海师范大学学报(自然科学版)》2025年第1期35-43,64,共10页Journal of Qinghai Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(U23A2026);青海省科技厅科技创新能力提升专项(西部之光项目);中国地质调查局柴达木盆地盐湖生态综合调查项目(ZD20220224);中国地质调查局地质调查项目(DD20220958)。

摘　　要：本研究以柴达木盆地那棱格勒河流域为研究区,采用1979-2018年中国区域高时空分辨率地表气象驱动数据集(CMFD),结合2000-2021年250m分辨率的归一化植被指数(NDVI)资料,开展流域内植被时空格局分析及对区域生态水文的响应研究.结果显示:那棱格勒河流域降水量以39.84mm/10a显著增加(P<0.01),流域上下游降水资源丰歉差异明显,流域内夏季降水占全年降水总量的63.42%.那棱格勒河流域在复杂地形和气候的影响下,植被NDVI整体较低,多年平均NDVI为0.17,植被覆盖面积较少且空间分布不均,流域内多年平均植被面积占流域面积的57.76%,2000-2021年,流域内植被面积和NDVI均显著增加(P<0.01),NDVI改善的区域面积约占研究区总面积的44.25%.流域内NDVI与气温、降水相关性有季节性差异,NDVI与降水存在部分年际间的波动一致性,气温对流域内的植被NDVI影响程度不高,多年来降水显著增加对植被NDVI增加有一定的正反馈机制.In this study,the Nalenggle River Basin in Qaidam Basin was selected as the research area,and the spatio-temporal pattern of vegetation in the basin and its response to regional ecohydrology were analyzed using the high spatio-temporal resolution Land surface Meteorological Driven dataset(CMFD)of China from 1979 to 2018 and the 250-meter resolution MODIS NDVI data from 2000 to 2021.The results showed that the precipitation in the Nalinggle River Basin increased significantly by 39.84mm/10a(P<0.01),and the precipitation resources in the upper and lower reaches of the basin had significant differences.The summer precipitation in the basin accounted for 63.42%of the total annual precipitation.Under the influence of complex terrain and climate,the NDVI of vegetation in Nalenggle River Basin is low on the whole,and the average annual NDVI is O.17.The vegetation coverage area is small and the spatial distribution is uneven.The average annual vegetation area within the basin accounts for 57.76%of the basin area.Both vegetation area and NDVI increased significantly(P<0.01),and the area of NDVI improvement accounted for 44.25%of the total area of the study area.The correlation between NDVI and temperature and precipitation in the basin has seasonal differences,NDVI and precipitation have some inter-annual fluctuation consistency,and the influence of temperature on the NDVI of vegetation in the basin is not high,and the significant increase of precipitation over the years has a certain positive feedback mechanism on the increase of vegetation NDVI.

关 键 词：那棱格勒河流域 NDVI 植被变化 生态水文 

分 类 号：P49[天文地球—大气科学及气象学]