主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2023, Vol. 39 ›› Issue (1): 73-82.doi: 10.3969/j.issn.1673-503X.2023.01.009

• 论文 • 上一篇    下一篇

基于光学遥感和微波遥感的土壤水分反演模型研究

王井利1(),高天娇1,2,李荣平2,*(),余鹏程1,2,马运涛1,米娜2,温日红2,张凯3   

  1. 1. 沈阳建筑大学交通与测绘工程学院, 辽宁沈阳 110168
    2. 中国气象局沈阳大气环境研究所, 辽宁沈阳 110166
    3. 辽宁省气象服务中心, 辽宁沈阳 110166
  • 收稿日期:2022-10-20 出版日期:2023-02-28 发布日期:2023-03-27
  • 通讯作者: 李荣平 E-mail:399109801@qq.com;rongpingli@163.com
  • 作者简介:王井利, 男, 1971年生, 教授, 主要从事地理信息与遥感技术(GNSS、GIS、RS)集成应用, E-mail: 399109801@qq.com
  • 基金资助:
    国家自然科学基金面上项目(41975149);辽宁省气象局备案项目(BA202003);国家自然科学基金面上项目(52078307)

Research on soil moisture retrieval model based on optical remote sensing and microwave remote sensing

Jing-li WANG1(),Tian-jiao GAO1,2,Rong-ping LI2,*(),Peng-cheng YU1,2,Yun-tao MA1,Na MI2,Ri-hong WEN2,Kai ZHANG3   

  1. 1. School of Transportation and Geomatics Engineering, Shenyang Jianzhu University, Shenyang 110168, China
    2. Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110166, China
    3. Liaoning Meteorological Service Center, Shenyang 110166, China
  • Received:2022-10-20 Online:2023-02-28 Published:2023-03-27
  • Contact: Rong-ping LI E-mail:399109801@qq.com;rongpingli@163.com

摘要:

选用2020年5月17日Sentinel-1和Landsat 8影像数据, 结合田间人工测墒数据, 以辽宁省朝阳市为例, 分别利用植被温度指数法和光学协同微波遥感反演算法反演土壤水分, 构建高精度土壤水分预报模型。结果表明: 基于光学遥感的植被温度指数(TVDI)不能较好反演农田土壤水分; 微波反射能够较好反馈土壤水分的空间变化, Sentinel-1雷达数据VV极化对土壤水分的拟合精度(R2=0.71)优于VH极化(R2=0.27);基于全球植被水分指数(GVMI)改进的水云模型效果最优(R2=0.80)。利用微波和光学遥感协同反演, 能够反演得到高空间分辨率、高精度的农田土壤水分数据, 有助于农业干旱的监测。

关键词: 土壤水分, 哨兵数据, 光学遥感, 预报模型

Abstract:

Based on the Sentinel-1 and Landsat 8 image data on May 17, 2020, and in combination with the field manual moisture measurement data, taking Chaoyang of Liaoning province as an example, the soil moisture was retrieved using the vegetation temperature index method and the optical collaborative microwave remote sensing inversion algorithm, respectively, and a high-precision soil moisture forecasting model was built.The results showed that the Vegetation Temperature Index (TVDI) based on optical remote sensing cannot well retrieve farmland soil moisture.Microwave reflection could be better feedback on the spatial variation of soil moisture, and the fitting accuracy of VV polarization of Sentinel-1 radar data for soil moisture (R2=0.71) is better than VH polarization (R2=0.27).The improved water cloud model (WCM) based on Global Vegetation Moisture Index (GVMI) has the best performance (R2=0.80).Using collaborative inversion of microwave and optical remote sensing can retrieve high-spatial-resolution and high-precision farmland soil moisture data, which is helpful for agricultural drought monitoring.

Key words: Soil moisture, Sentinel data, Optical remote sensing, Forecasting model

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