摘要
植被状况的变化是反映区域性生态环境状况的重要指标。地下水是影响植被变化的主要因素。宁夏地处干旱半干旱地带,是全国生态系统最脆弱的省区之一。2000年后,随着宁夏黄河引水量的减小,水资源的不合理应用使银川平原的生态植被出现了退化的趋势。本文利用MODIS-NDVI遥感数据,对银川平原2000~2004年间的植被变化趋势进行了研究。在此基础上,对引用黄河水量及多年地下水位的变化对植被的影响进行了分析,并对适宜于植被发育的地下水位埋深进行了探讨。
Variability in vegetation is one of the important indices for a regional eco-environment. Groundwater is an important affecting factor for vegetation variation. Located in an arid and semi - arid area, Ningxia is one of the weakest ecological systems in China. With the decrease in diverted water volume of the Yellow River, the vegetation in the Yinchuan Plain has a tendency of recession due to the unreasonable utilization of water resources since 2000. This paper examined the vegetation change from 2000 to 2004 by using the MODIS-NDVI data. Based on the trend research, the impacts of the reduction in diverted water volume of the Yellow River and the decrease in water table on the vegetation in the Yinchuan Plain was analyzed, and the proper groundwater level for vegetation development was also discussed.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2007年第3期33-36,共4页
Hydrogeology & Engineering Geology
基金
国家自然科学基金项目(90302003)资助
