MODIFIED TRIANGLE METHOD TO ESTIMATE SOIL MOISTURE STATUS WITH MODERATE RESOLUTION IMAGING SPECTRORADIOMETER (MODIS) PRODUCTS
Soil moisture condition is one of the key parameters in environmental and agricultural modeling. In this paper, a modified triangle method (Ts/VI space) is suggested. Both NDVI and EVI are used in constructing the space. Based on this method we calculated the Temperature-Vegetation Dryness Index (TVDI) using 20 MODIS images (Land surface temperature and vegetation index products) to estimate the soil moisture condition in Northern China Plain. In situ moisture data from 133 agricultural stations are used to validate the TVDI. Finally, the relationship between TVDI and rainfall is examined. We found that the triangle method can be a fast and simple method to estimate regional soil moisture conditions.
Remote Sensing Agriculture Soil Moisture Estimation
X.Yang J.J.Wu P.J.Shi F.Yan
State Key Laboratory of Earth Surface Processes and Resource Ecology (Beijing Normal University), Beijing, 100875, China Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs & Ministry of Education, Beijing, 100875, China
国际会议
北京
英文
8801-8805
2008-07-03（万方平台首次上网日期，不代表论文的发表时间）