2022—2023年枯水期珠江流域供水保障“三道防线”调度与思考

Practice and thinking on"Three Defense Lines"of water supply system regulation in the Pearl River Basin during 2022-2023 dry season

2022—2023年枯水期,珠江流域受降雨、江河来水持续偏少影响,西江遭遇特枯水年。随着径流减少,珠江河口咸潮上溯严重,直接威胁澳门地区、珠海等地城乡居民生活供水安全。通过筑牢供水保障“三道防线”,先后实施8次压咸补淡应急补水调度,有效压制河口咸潮,增加了下游河道取水口抽取淡水的概率,有效保障了城乡供水安全。总结2022—2023年珠江流域供水保障“三道防线”调度实践,对压咸补淡应急补水调度工作进行思考,为今后抗旱保供水实践提供经验参考。

During 2022-2023 dry season,the Pearl River Basin had been affected by insufficient rainfall and runoff,and then the Xijiang River had suffered an extraordinary dry year.With the decrease of runoff,the saltwater intrusion in the estuary became serious,which directly threatened the water supply security of urban and rural residents in Macao,Zhuhai and other places.By strengthening the By strengthening three defense lines of water supply system and implementing eight emergency water supply regulation of freshwater supplement,the saltwater intrusion in the estuary was effectively suppressed,and the probability of fresh water extraction from downstream river was increased,which effectively ensure the water supply security of urban and rural area.This paper summarizes the regulations of three defense lines of water supply system during 2022-2023 dry season of the Pearl River,and some thoughts on the emergency water replenishment of saltwater prevention and freshwater supplement,so as to provide experience reference for the future practice of drought prevention and water supply.