摘要
ET0是国际通用的评价水资源和计算作物需水量的基础数据,但是根据理论公式计算ET0需要很多气象数据,因此ET0数据不易获得。利用青海省东部农业区2003年卫星植被指数数据(NDVI),与通过遥感技术用PM方程计算的ET0进行响应分析。实验结果表明单站点的ET0与NDVI线性关系较为显著,可以用来进行ET0反演,而多站点随着距离和站点数的增加,由于地域及气候差异等因素使得两者显著性下降,需要引入更多的参数进行反演。
ETo is the internationally accepted basis data for the evaluation of water resources and crop water requirements calculation. But the calculation of ETo according to the theoretical formula needs a lot of meteorological data, so the ETo data is not readily available. In this paper, the 2003 satellite vegetation index data （NDVI） of Eastern Qinghai Agriculture zone is used to analyze the re sponse of ETo calculated by remote sensing technology and the PM equation. The experimental results show that the linear relation ship between ETo and NDVI in single site is more significant and can be used for the ETo inversion calculation. While for muhisites, with the increase of distance and the number of sites, the significance decreases due to the factors such as geographical and climatic differences, so more parameters are needed for the inverse calculation.
出处
《节水灌溉》
北大核心
2013年第5期58-60,63,共4页
Water Saving Irrigation
基金
国家自然科学基金"变化环境下西北旱区农业水资源系统的响应模拟及敏感性评估"(51279166)
水资源与水电工程科学国家重点实验室项目"基于遥感技术的蒸发量分析研究"(2011B083)
西北农林科技大学"遥感监测渭河水质"(2201110712132)
西北农林科技大学农业水工程实验教学示范中心"以应用为导向的GIS案例教学模式研究"(AWEDF102)
