Injection of roof water harvested to borewell

Question

Hello, I am in civil construction business. I know that a runoff can not be directly injected to the bore well. But we are constructing rain harvesting structures on roof and using filters at the end line. Can we inject this water directly to the bore well? And is that true that direct injected water recharge aquifer quickly? I need help for my site development.

Biplab Ketan Paul · Answer

Jamie is right. will love to share some of our community experience. regards Biplab skype; @biplabkp

balbir singh · Answer

normally a box of 10x10x3 feet is made around the bore well filled with sand, gravel & stones. channels of 6 inches are  made to direct the rainwater from the  roof & surroundings into the box.  around the bore well pipe small holes are drilled & covered with fine nylon cloth as a filter to prevent mud from entering the bore.

Rankeene Bahadur · Answer

JAMIE THANKS FOR THE REPLY. WE WILL MAKE A POINT TO KEEP IN OUR AGENDA OF CLORINIFICATION. AND ALSO WILL PASS THE HARVESTED WATER FROM SOME DRUM TO SETTLE THE IMPURITIES IF ANY.

Jamie Skolnik · Answer

Direct Injection of water to borewell
Yes you can directly inject the water from ROOF rain water harvesting system as the water is clean. And as you are also using the filter then there will not be any problem of any trash entering in the bore well. But the water can contain some bacteria which can affect groundwater quality, so make sure that the bore well is subjected to chlorination every time water gets injected into it. Also you need to be careful while injecting the water directly as some time it may  create air bubble in the pipelines.
In case if the filters are not working then store the water in some tank first and let the sediments and impurities settle at bottom and then inject them to bore well.
Now about your your second question, the recharge depends on the type of soil, type of aquifer of the region etc. So you have to check the site situation first. Even you have to check if the direct injection of water is permitted in your area. As I know some states do not permit the direct injection of water in bore well, then you have to sue the pit method.
If you want more details please write back at jamie.skolnik@gmail.com

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