Dear All, Thank you all for ...
Published by Dr. Kiran Bhatt
Dear All,
Thank you all for your overwhelming reponse and ideas and suggestions on recharging of storm water. We, being a team of hydrogeologists and civil engineers, always do take necessary care before implemrnting the water harvesting project. In fact, our efforts have been to popularise on the insistence of use of scientific and technical knowledge while planning the water harvesting & recharging project. The method that we have adopted is a modified version of the traditional water harevsting system which has double filtration unit of `V' wire screens filled with the gravel pack to filter out alkl the fine impurities and silt. The screens are also lowered and placed against potential aquifer zones identified after electro-logging survey. These wells have a capacity of recharging about 15 to 20,000 litres of runoff water per hour. While impleneting the scheme, care has been taken to avaoid runoff from roads and sewage lines and other such possible polluting sites. We have observed that after implementation of the water harvesting & recharging projects, water quality has improved with lowering of TDS concentration and also water levels have shallowed. These days, with the impact of climate change becomning more and more pronounced, rain spells are heavy and of short duration viz. 60 to 70 cm of rain in 2 hours. In such events, generally, city drainage netwroks fail to cope up with the volume of storm water leading to water logging and flodding conditions. To addtress these types of situations, we feel that modified water harvesting and recharging structure can be considreed as a solution. Settling basins could be an answer fore recharging of clean water but in urban perspective, it really becomes challenging as space is the main constraint. I thank you all again for your interest and please do share your valuable comments and suggestions to help us serve the society in better & secure way.
1 Comment
I am deeply concerned with your method and advise that you reconsider. If your water quality is not drinking water quality or better, you risk introducing contaminants into the aquifer that can have negative effects for years to come. If you wish to only filter storm or rain water and not disinfect and remove soluble pollutants, please do not inject directly into the aquifer through wells. There are many instances where pollutants have been inadvertently introduced into an aquifer only to show up again far downstream in drinking water wells. If this aquifer is to be used for drinking water, please do not inject unpurified water into it.
Published by Walter Eshenaur, Mentor at Engineers Without Borders
1 Comment
Thank you for your advice. We shall consider this while implementing the RWH projects.
Published by Dr. Kiran Bhatt