Evolutionary law of hydrological and drought states in large basins of China under the influence of human activities
Due to the compounded impact of climate change and human activities,the occurrence of extreme drought events poses a key constraint to societal development and threatens ecological security.Quantifying the in-fluence of human activities on the hydrological drought evolution process is crucial for formulating rational water re-source allocation strategies and mitigating the impacts of drought on both human society and ecosystems.To address this,our study coupled the PCR-GLOBWB model,which captures the nuanced effects of human activities,with the SRI-RRV framework.This coupling enabled a quantitative assessment of the spatio-temporal variations in the impact of human activities on the hydrological drought evolution process and drought conditions in major river basins across the country.The results indicate that human activities generally exacerbate(alleviate)hydrological drought in the northern(southern)regions of China.Human activities have intensified the expansion of nationwide drought areas before 1990,but have reduced drought-affected areas in southern regions after 1990.Taking into account human influence,the drought severity in the Yellow River,Huaihe River,and Haihe River basins has significant-ly worsened,while the SRI-RRV grades in the Yangtze River,Pearl River,and southeastern basins have im-proved.This study highlights the regional disparities in the impact of human activities on hydrological drought,em-phasizing the need for tailored water resource management measures based on the characteristics of different river basins to alleviate the losses caused by drought.
万方数据
维普
