摘要
本文对基于植被指数一地表温度特征空间的三角形算法进行改进，用梯形特征空间代替三角形空间，并把利用遥感数据计算出来的瞬时腾发量扩展到日、月等时间尺度上。利用改进后的模型对新疆塔里木盆地喀什噶尔绿洲、叶尔羌绿洲及和田绿洲2001～2002年的腾发量进行了模拟计算，分析了腾发量的时空分布，模拟结果比较合理。
The triangular method for estimating vegetation index space is improved by adopting the evaportranspiration using the surface temperature and a trapezoidal space to substitute the conventional triangular space, and the instantaneous evaportranspiration obtained from remote sensing data is extended to the scales of day and month. The improved method is applied to calculate the evaportranpiration in 2001 and 2002 of Kashigar Oasis, Yerqiang Oasis and Hetian Oasis, which are located in Tarim Basin of Xinjiang Autonomous Region, China. The calculated total water consumption based on this proposed model is approximately equal to that obtained from water balance. The temporal and spatial distributions of simulated evaportranpiration are reasonable, indicating the usefulness of this model for arid zones.
出处
《水利学报》
EI
CSCD
北大核心
2008年第4期483-489,共7页
Journal of Hydraulic Engineering
基金
国家自然科学基金项目(50509011)
关键词
地表温度
植被指数
遥感
腾发
绿洲
干旱区
surface temperature
vegetation index
remote sensing
evaportranspiration
oasis
arid zone
