Recently I read about Jharkhand government plans to construct a large number of check dams in forest and upper catchment regions for groundwater recharge and water retention.
I understand the short-term benefits:
1.increased groundwater level, 2.irrigation support, 3.water availability during summer, and drought mitigation.
But I have some serious questions regarding the long-term ecological and geomorphological impact of such large-scale intervention.
Most publicly available DPRs and reports mainly discuss:
1.construction, 2.site selection, 3.runoff, and expected water storage.
But where are the long-term studies regarding:
1.sedimentation after 20–30 years, 2.downstream flow reduction, 3.geomorphological changes, 4.river connectivity, and impact on tribal ecology?
Rivers like the North Koel River and South Koel River are sensitive river systems dependent on upstream hydrology. If thousands of structures are introduced across upper catchments, cumulative effects should also be studied scientifically.
My concern is not against water conservation. The question is whether the project has undergone:
basin-scale hydrological modelling, sediment transport analysis, GIS-based cumulative impact assessment, climate-linked forecasting, and independent ecological review.
Ideally, projects of this scale should involve transparent consultation with institutions such as IISc Bengaluru, hydrologists, ecologists, civil/water resource engineers, and local universities.
Has anyone seen publicly available reports covering these long-term impacts?
PC:- open.ai