关键词: 作物缺水指数, 干旱, 遥感, 监测

Abstract: Based on the theories of disaster risk analysis, the climate data over the years, and the information about wheat growth, its planting area, and grain yield in Jianghuai Region, this paper analyzed the waterlogging vulnerability, climatic risk, disaster-loss risk, and anti-disaster capability of wheat in the Region. The models characterizing the waterlogging risk for wheat, including waterlogging vulnerability, climatic risk index, disaster-loss risk index, and comprehensive assessment coefficient of waterlogging risk, were established, and the regionalization of waterlogging risk for wheat in Jianghuai Region was made, with the comprehensive assessment coefficient of waterlogging risk as the indicator. In the Region, the characters of the waterlogging risk could be better characterized by the combination of four factors, including waterlogging vulnerability, climatic risk index, disaster-loss risk index, and anti-disaster capability. The comprehensive risk of waterlogging for wheat was classified into four levels, i.e., high, medium high, medium, and low. The south Jianghuai Region in Anhui Province belonged to high risk area; the areas along the middle part of Huaihe River, middle-south part of Jianghuai Region, and Hongze Lake belonged to medium-high risk area; the south of 33°N in Henan Province and the middle part of the north area along Huaihe River in Anhui and Jiangsu provinces belonged to medium risk area; and the north of 33 °N belonged to low risk area.

Key words: Crop water shortage index, Drought, Remote sensing, Monitoring