摘要
土壤湿度在全球水循环运动中扮演着非常重要的角色,是水文、气象和农业研究中的重要参数土壤湿度。土壤湿度的获取方法可分为三类:田间实测法、土壤水分模型法和遥感法。田间实测法可以准确估测土壤剖面的含水量,但只能得到单点的数据,这种方法需要大量的人力物力。土壤水分模型法需要大量气象数据的支持,且参数复杂、确定困难,估测误差较大。利用遥感影像可迅速、动态的获取大区域尺度的各种信息,从而为土壤湿度的实时动态监测提供技术支持和精度保证。随着遥感技术的不断发展,其反演土壤湿度的方法也越来越多。
Soil moisture plays a very important role in the circulation of water. It is a key parameter in the study of hydrology, weather and agriculture. The measurements of soil moisture can be classified as three kinds. The first is field measurement. The second is models of water and soil. The last is remote sensing. Although the first can accurately measure the soil moisture, the data is not only a little and also require plenty of manpower and material resources. The second one not only needs a lot of meteorology data, but also includes many complicate parameters. So it is difficult to select parameters and reduce error. You can acquire a lot of information at a regional scale by image of remote sensing. Soil moisture can be measured instantly in this way. With the development of remote sensing, more and more methods will be applied to measure soil moisture.
出处
《楚雄师范学院学报》
2008年第6期89-92,共4页
Journal of Chuxiong Normal University
关键词
遥感
土壤湿度
研究进展
soil moisture
advancements of research
deficiency.
