Research on standards and objectives of mother river recovery

Zhu Dangsheng; Zhang Jianyong; Wang Xiaohong

doi:10.3969/j.issn.1000-1123.2024.21.003

Abstract：Research on the standards and objectives for mother river recovery is essential for advancing the Mother River Recovery Action. Based on an analysis of the concept and connotation of mother river recovery,it is recognized that achieving ecological recovery of rivers and lakes is a long-term process. Recovery standards should be developed by region and category,with guiding principles such as focusing on specific types of rivers and lakes to define tailored standards,recovering critical hydrological processes in line with natural dynamics,implementing differentiated recovery measures by region and type,and aligning with planning requirements to reflect phased recovery goals. This study proposes methodologies for setting recovery objectives that consider the intrinsic water resources and utilization conditions,project scheduling and recharge conditions,ecological protection needs,and recovery standards. An index system for river and lake recovery is established,comprising five attribute layers:ecological flow assurance,connectivity restoration,groundwater over-extraction management,water quality improvement,and water ecological restoration. The recovery targets of 88 rivers and lakes were reviewed,with a statistical analysis conducted,including the 2025 recovery objectives for some interprovincial rivers. The findings offer guidance for formulating and implementing mother river recovery plans and scientifically assessing the effectiveness of recovery efforts.