1Utilization Structure and Trends of Non-conventional Water Resources in Haihe River BasinZHANG Zhi-qian, WANG Jing-jing, YANG Feng1-42Changes and Attributions of Runoff in the Source Region of the Yangtze River from 1960 to 2020DONG Qian, SUN Hao, LIU Hong-yuan, CHEN Tian-yue5-123Effectiveness of Ecological Recovery of Rivers and Lakes in Groundwater Over-exploitation Areas of North ChinaLI Yu, WU Yu-xi, ZHU Jing-si13-16,204Current Situation and Countermeasures of Watershed Ecological Environment ProtectionHE Fang17-205Implementation Plan of Multi Energy Complementary Energy Base of Wind Power,Photovoltaic,Thermal Power StorageZI Tian-liang, XU Li-zhou21-246Analysis of Health Issues and Protection Strategies of Zhanghe RiverCHEN Bo-jian, ZHU Xiao-jing, JIN Xin28-327Experimental Analysis of Pz Hydraulic and Supporting Irrigation Area EngineeringSU Tong, GUO You-shuang51-54,588Calculation Method Analysis for Lining Structure of Hydraulic TunnelWANG Shui-shan, GUO Xiao55-589Application of OpenRoads Designer Software in Channel 3D DesignLIU Jia-qi, DAI Wen-kai65-70,9410Application of Video-based Flow Rate Identification Technology in Flow MeasurementZHANG Chi, ZHANG Zheng, WANG Long, ZHANG Jun-yang71-7811Application of Buried Stone Concrete in Maxi Reservoir,Xiushan County,Chongqing CityLI Ya, LI Xiao-chao79-8212Experience and Practice of Promoting the Development of New Quality Productivity through the Construction of Digital Twin Haihe RiverHAN Xue-cheng, ZHANG Xia91-9413Digital Application of Water Conservancy Project Construction ManagementREN Tian-xiang, ZHI Wan-li95-9914Prospect of Network Security Construction of Zhangweinan Canal Administration Bureau Based on Digital Twin ConstructionJIANG Wei-hua, SONG Ai-lian100-103,11115Current Status and Reflections on the Development of Engineering Insurance in Water Conservancy Project Construction ProjectsGUO Jun-Chen112-117,121