摘要
土壤水分是陆地表面参数化的一个关键变量.土壤水分含量随时空的转换而变化,对地面、大气间的热量平衡、土壤温度及农田墒情等都会产生明显的影响.传统的土壤水分测量方法采样速度慢、费用高、代表性差,无法满足实时、大范围监测的需要.遥感监测土壤水分克服了以上的缺点,利用遥感技术监测土壤水分是目前定量遥感研究的前沿和难题之一.总结了目前国内外遥感计算土壤含水量的主要方法和研究进展,同时进行了对比研究,对不同方法的原理及应用情况进行分析,指出这些方法的适用条件、存在问题及改进措施.
Soil moisture is the key Variables of land surface parameterized. Soil water content is changed with spatial and temporal variation which put significant effect on land, atmospheric heat balance, soil temperature and farmland moisture condition.The traditional soil moisture measurement method samples slowly, costly and bad representativeness, it is unable to meet the real-time need monitoring on a large scale. Monitoring soil moisture based on remote sensing has overcome the above-mentioned shortcomings. It is one of the front studies in quantitative remote sensing. This paper has made a review on the remote sensing information models for monitoring soil moisture, And these methods and their advantages and disadvantages have been summarized. Further the key problem for solving in these models＇ has also been discussed.
出处
《新疆地质》
CAS
CSCD
2008年第1期107-116,共10页
Xinjiang Geology
基金
国家自然科学基金项目(40601103)
西部联合人才培养计划(0634021001)共同资助
关键词
土壤水分
遥感监测
模型
soil moisture
remote sensing monitoring
models
