土壤水分的遥感监测方法概述

Summary of remote sensing methods for monitoring soil moisture

回顾了目前国内外土壤水分的遥感监测方法,介绍了反射率法、植被指数法、地表温度法、温度-植被指数法、作物水分胁迫指数法、热惯量法和微波法,并对各方法的优缺点进行了详细比对;在总结国内外土壤水分遥感监测研究方法的基础上,对目前该研究领域的重点、难点和未来的发展方向进行了评价。认为:热惯量法和植被温度指数法是较为成熟的方法;微波遥感因其独特的优越性,将是该领域的重点研究方向。

A comparison with traditional soil moisture monitoring methods shows that the remote sensing method has great superiority. This paper presents a review of the remote sensing methods currently used both in China and abroad for monitoring soil moisture, which include the reflectivity method, the vegetation index method, the surface temperature, temperature - vegetation index method, the crop water stress index method, the thermal inertia method and the microwave method, with a detailed comparative description of the advantages and disadvantages of these methods. Based on summarizing researches on remote sensing monitoring methods for soil water, this paper evaluated the focal points, difficulties and development trend of this research field. It is held that the thermal inertia method and the vegetation temperature index method are relatively mature methods for soil moisture monitoring. With the wide application of geographic information system, the microwave remote sensing will become the key research direction in this field because of its unique advantages.