黑河下游额济纳地区植被变化规律及最小需水量的估算  

Vegetation change and estimation of the smallest water demand of Ejina oasis in lower reaches of Heihe River

作　　者：金晓媚[1] 胡光成[1] 

机构地区：[1]中国地质大学(北京)水资源与环境学院,北京100083

出　　处：《水利水电科技进展》2010年第1期30-34,共5页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(40772158)

摘　　要：将2000～2008年MODIS-NDVI与黑河径流量数据相结合,在区域尺度上定量研究额济纳绿洲植被的多年变化规律及其与河流径流量的关系,并对额济纳地区的最小需水量进行了估算。结果表明,在新的配水方案实施后,绿洲年均植被指数呈上升趋势并与黑河径流以及地下水有很强的依赖关系,而且黑河径流对额济纳绿洲的影响存在1年的滞后期。维持额济纳地区生态环境不发生退化的年最小需水量为4.5×108m3。By combining the MODIS-NDVI with the runoff of Heihe River during the period of 2000-2008, the annual change rules of the vegetation of Ejina oasis and its relationship with and the runoff of Heihe River were quantitatively studied from a regional scale. The smallest water demand in this region was estimated. The results indicate that the annual mean NDVI of Ejina oasis has an exponential increase tendency after the implementation of the new water allocation scheme of and greatly depends on the runoff of Heihe River and the groundwater. The impact of the runoff of Heihe River on Ejina oasis has the time lag of 1 year. The annual smallest water demand to sustain the ecological environment in Ejina area is 4.5 ×10^8 m^3.

关 键 词：MODIS-NDVI 径流量 最小需水量 额济纳绿洲 

分 类 号：X171[环境科学与工程—环境科学]