1Models and key technologies for the Mother River Recovery ActionWang Xiaohong, Shi Xiaoxin, Zhang Jianyong, Chen ChunjinSpecial Focus1-62Status of the Mother River Recovery Action and key supervision suggestionsLiu Xin'ai, Wan Yi, Li RuiqiSpecial Focus7-103Analysis of river and lake remote sensing monitoring for the Mother River Recovery ActionWang Shiyan, Du Fei, Jiang Zhi, Sun Long, Ba Yibo, Wang Xu, Wang Qianqian, Li Boqin, Xiao ZijunSpecial Focus11-164Achievements of the Mother River Recovery in the Haihe River basin and reflectionsMu Dongjing, Song Qiubo, Ma Huan, Qi JingSpecial Focus17-205Theoretical framework and practical application of water resources conservation and intensive utilizationZuo Qiting, Zhang Shuqi, Quan ZhimiaoWater Resources Management21-26,446Multi-scale evolution and safety regulation of water resources in lake watershed under water diversion influenceWang Zongzhi, Bai Ying, Du Huihua, Liu Kelin, Cheng Liang, Wang Kun, Wang WenqiWater Resources Management27-337Estimation of population exposure to urban flooding in the Guangdong-Hong Kong-Macao Greater Bay Area under extreme rainfallLiu Zhiyong, Chen Xiaohong, Lin Kairong, Tu Xinjun, Zhao Tongtiegang, She ZhenyanFlood and Drought Disaster Prevention34-388Development status and trend analysis of water-saving management contractsLei Jing, Ren Liang, Wang Wei, Zhang RanWater Conservation39-449Research and enlightenment on the system of reclaimed water utilization allocation measures in Zhangjiagang CityLi En, Yan Bing, Zhang Lei, Yao Ling, Wang WeiWater Conservation45-49,5610Practice and reflections on the construction of the digital twin Pi RiverChen Sheng, Li Jingbing, Wang Yuli, Zhang Jintang, Liu Changjun, Liu YesenWater Resources Informatization50-5611Application of digital twin technology in large-scale irrigation water networks——a case study of Longyun Irrigation District water network in Yulin,GuangxiSun Xiaolei, Li Longfei, Deng Hai, Wei Feng, Zhang Qi, Li LupingWater Resources Informatization57-6212Study on the planning method for protecting urban small and micro water bodies based on the"source-flow-sink"theoryFang Huiying, Du JiadanRiver-Lake Management and Protection63-67 