River Policy Experts on Tapi Dredging Near Hazira Mangroves

River Tapi Dredging R&D Project I am seeking informed, policy-level guidance regarding the proposed River Tapi Dredging R&D Project near the Hazira Mangroves (≈161 acres), intended to address critical concerns such as river rejuvenation, backflow management, flood mitigation, and long-term hydraulic stability. Technical assessments indicate that the Monsoon discharge (\~11300 cusec), cross-sectional width variations (465 m → 680 m), extremely low slope (1/2130), and bed roughness (0.04) collectively create conditions where backflow and reduced conveyance efficiency are increasingly probable. The project seeks to validate, through controlled R&D-based dredging, whether targeted modification of bed levels can restore functional hydraulic gradients without compromising ecological assets such as the Hazira Mangroves. Despite documented engineering justifications, the project has not progressed through administrative corridors. From a policy, regulatory, and governance standpoint, what might be the principal constraints: EIA thresholds, multi-agency jurisdiction, coastal regulation concerns, sediment management protocols, hydrological model validation, or precedent-related risk aversion? Input from experts who have worked on national river missions, floodplain governance, port-channel dredging frameworks, or ecological impact policy would be particularly valuable in identifying the precise barriers and the most appropriate procedural pathway for project initiation.