The response of drought in Beiluo River Basin of China based on the comprehensive method of Pa, SPI and fuzzy

3rd International Conference on Water Resource and Environment

地球科学;生态环境科学

Zhang, L.P.^1 ; Liu, D.F.^1 ; Zhang, H.X.^1 ; Huang, Q.^1 ; Chang, J.X.^1

State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, School of Water Resources and Hydropower, Xi'An University of Technology, Xi'an

710048, China^1

关键词: Comprehensive method;    Economic development;    Meteorological drought;    Meteorological station;    Precipitation data;    Precipitation trends;    Scientific basis;    Spatio-temporal changes;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/82/1/012062/pdf
DOI  :  10.1088/1755-1315/82/1/012062

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The meteorological drought is threatening the agricultural economic development with the change of the climate. In order to analyze the characteristics of drought spatiotemporal change, the precipitation data of eight meteorological stations in the Beiluo River Basin of Shaanxi Province of China have been collected, and the drought index of Pa, SPI and FSE have been selected to analyze the drought in Shaanxi Province for the last 55 years. The results of Pa, SPI and FSE test show that the droughts happened in the Beiluo River Basin are 149, 215 and 203 times in the past 55 years, respectively. Overall, the Beiluo River has a tendency to dry out. The main type of drought is low-grade drought, followed by the mediumgrade drought, and the specially-grade drought happened least. The average rainfall decreases in the Beiluo River Basin from the southeast to the northwest, and the change of the number of drought is just opposite to that of precipitation trend, which increases from southeast to northwest. The results will provide the scientific basis for the monitoring, evaluation, early warning and drought relief.