1Pilot studies and reflections on deep groundwater recharge and restoration in North ChinaConsultation Group for Comprehensive Management of Groundwater Overdraft in North China,Science and Technology Committee,Ministry of Water ResourcesSpecial Focus1-52Thoughts and suggestions on accelerating high-quality development in hydrologyLIU ZhiyuSpecial Focus6-11,53Ideas,strategies,and measures for the compilation of the water security safeguarding plan during the 15th Five-Year Plan period in the Huaihe River basinYANG FengSpecial Focus12-184The"four principles"of engineering ecology and typical applicationXU Mengzhen, WANG Guangqian, WANG ZhaoyinForefront19-265The characteristics of long-term spatiotemporal changes in land surface water bodies in ChinaYIN Xiaolan, NIU Zhenguo, KE Yinghai, ZHOU DeminForefront27-376Principles and application cases of runoff monitoring technology based on remote sensing hydrological stationsLOU Hezhen, SUN Gaohu, YANG Shengtian, SONG Wenlong, TANG YaoyingForefront38-457Safeguarding and enhancing the resilience of small and medium-sized reservoir dams under floods exceeding design standardsJING Laihong, LI Hong'enFlood and Drought Disaster Prevention46-518Key technology and innovation system of the"Ningxia model"for implementing"defining city,land,population,and production by water"YANG Zhi, ZUO Qiting, ZHANG Na, TIAN Wei, GAO Haiyan, ZHAO ZhinanWater Resources Management52-589Study on advancing provincial water budget management in Hebei ProvinceLI Guozheng, MA Suying, LI Yujia, WANG SenhaoWater Resources Management59-6610Applications and exploration of satellite remote sensing in the supervision of drinking water sources in the Pearl River basinFENG Youbin, HE YingqingWater Resources Management67-72