Impact of the comprehensive remediation project on hydrological conditions in the lower reaches of the Ganjiang River

Abstract

This study undertakes a systematic analysis of the hydrological changes before and after the implementation of the Comprehensive Remediation Project in the lower reaches of the Ganjiang River. It focuses on changes in downstream inflow, ratios of flow distribution, and water levels, as well as water velocity near the gates. The results indicate a significant improvement in the spatial distribution of water resources in the lower reaches of the Ganjiang River. The project enhances the inflow from the northern and southern branches, positively influencing downstream water usage and the ecological environment. Building upon these findings, the study proposes operational recommendations tailored to different hydrological years, such as timely adjustments to the southern branch's water inflow and optimizing flow distribution ratios. This research provides a scientific basis for the implementation and dispatch of comprehensive remediation projects and offers insights into water resource management in similar regions. HIGHLIGHTS Study reveals enhanced water distribution and inflow improvements post-comprehensive remediation project.; Significant spatial redistribution of water, boosting northern and southern branches’ supply.; Project success in ensuring sustainable water use and supporting ecological balance in Ganjiang's lower reaches.;

Keywords

• comprehensive remediation project
• flow distribution ratios
• hydrological conditions
• lower reaches of the ganjiang river
• water resource operation