1Challenges and prospects of safe,ecological,and smart reservoir and dam constructionZHOU Chuangbing, XIANG Yan, YAO Chi, SHENG JinbaoForefront1-102Thoughts on construction of digital twin rural water supply projectsHU Meng, LI Lianxiang, XU WeitongIrrigation,Drainage and Rural Water Supply11-183Evolution patterns,protection,and restoration of deep confined aquifer in the North China PlainZHAO Yong, WU Chu, LIU Rong, MA Meng, LU ChuiyuWater Resources Management19-284Strategies and measures for the Mother River Restoration Action in northern ChinaCHEN Chunjin, JIAN Yuxiang, WANG Xiaohong, ZHAO WenjingWater Ecology29-355Pollution characteristics of nitrogen in surface sediments of the perennial backwater area of the Three Gorges ReservoirHAN Chang, YANG Wenjun, BI Sheng, HU Man, TENG Sufen, HU Yu, CAO HuiqunWater Ecology36-466Practice and reflection on the construction of flash flood monitoring and early warning systems in ZhejiangYAO Yuelai, ZHOU Zhengjie, TANG Xianli, LUO TangsongFlood and Drought Disaster Prevention47-527Simulation deduction,prevention and control effectiveness analysis of waterlogging disasters in MacaoYU Xiao, LIU Jiahong, LI Wen, LUO Zhuoran, MEI Chao, DONG LirongFlood and Drought Disaster Prevention53-598Exploration of safety status and digital twin construction of small reservoirs in Anhui ProvinceWANG Mingming, ZHANG Wanbo, LIU BinbinProject Construction and Operation60-659Exploration of the construction path of a groundwater digital twin system in Shanxi ProvinceZHANG Yu, WANG Huiru, WU XiaoqinDigital Twin Water Conservancy66-71