基于Landsat8遥感图像的土壤含水量提取研究

A Research into Soil Moisture Extraction Based on Landsat 8Remote Sensing Images

土壤含水量是影响植被生长的一个主要因素,也是研究气候、水温、生态、农业等领域的重要参数。遥感能够快速方便地获取较大区域的地表信息,因此使用遥感技术对土壤含水量进行提取具有重要的意义。以2015年8月15日获取的唐山市中北部地区Landsat 8影像为研究对象,通过计算植被归一化指数和反演地表温度,利用植被供水指数法得到该区域内的土壤含水量分布情况。研究结果表明,利用植被供水指数法可对Landsat 8遥感影像进行土壤含水量信息的提取,由此也扩充了Landsat 8影像的应用范围。

Soil moisture is not only a major factor in the growth of vegetation, but also an impor- tant parameter in the study of climate, water temperature, ecology, agriculture and many other fields. Remote sensing can quickly and easily get the surface information of a large area, so it is very important to use remote sensing technology to extract soil moisture content. In this essay, with Landsat 8 images of August 15, 2015 in north central of Tangshan as the research object,the soil moisture distribution of the region is obtained by calculating the normalized vegetation index and inverting the land surface temperature. The research results show that the vegetation water supply index method can be used to extract the information of the soil moisture content of Land- sat 8 remote sensing images, which extends the application range of Landsat 8 images.