Spatial and temporal changes of precipitation in the Xijiang River under climate change
XU Wang1， TANG Li2， ZENG Qinghuai1， LIANG Hong1， LI Huiya1
(1.Environment monitoring institute of Shenzhen， Shenzhen 518049， Guangdong， China；2.Ecology monitoring institute of Shenzhen， Shenzhen 518000， Guangdong， China)
Abstract：The Pearl River Basin is the largest basin in South China， and the Xijiang River is the largest tributary of the Pearl River. The changes of annual maximum precipitation and mean precipitation in the Xijiang River would have influence on hydrological extremes and water scarcity. However， the study on future annual maximum precipitation and mean precipitation in the Xijiang River remains limited. The Inter-Sectoral Impact Model Intercomparison Project data were used to study annual maximum precipitation and mean precipitation changes in the Xijiang River. It's found that the annual maximum precipitation and mean precipitation would increase in the future under the RCP 8.5 and RCP 4.5 scenarios. The spatial distribution of the changes varies with climate models. The increasing trend of annual maximum precipitation is significant under the RCP 8.5 scenario， while not significant under the RCP 4.5 scenario. The increasing trend of annual mean precipitation is not significant under the RCP 8.5 scenario， while significant under the RCP 4.5 scenario.
2022, Vol. 56 
