Why should I recharge groundwater?

Bangalore is growing at an unprecedented rate,and its sprawling expansions outpaces the public utility’s ability to accommodate the skyrocketing demand for water and sanitation services. It is increasingly common for new residential communities to assume total management for their own water and sanitation services through the resident welfare associations. Most of these depend on borewells and tankers, which they sooner or later realise is not a sustainable option.

Groundwater recharge, one of the forms of rainwater harvesting, can be instrumental in achieving long-term water security. By taking water out of over-stressed storm drains and replenishing them into shallow aquifers, groundwater recharge wells effectively raise water tables and reduce the intensity of flooding in a layout.

The diagram above explains Bangalore’s geology – below the top soil is the weathered zone, which is made of rocks and behaves like a sponge. This layer changes from area to area. Then comes the bed rock layer. The bed rock is not a monolithic layer; the rocks have cracks and fissures through which water passes and gets accumulated inside the rock. This is a deep aquifer. Borewells break into the bed rock and tap into the water there.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Similar Story

Unplanned growth, flawed notification endanger Delhi wetlands

Increased public involvement and lessons from successful restoration attempts can help revive the crucial wetlands under threat in the city.

Have you been to the Surajpur wetland, near Surajpur village in Gautam Budh Nagar district? Located in the midst of an expansive industrial city under the administrative purview of the Greater Noida Development Authority, it reveals itself as a mosaic of a sprawling lake, towering trees and thousands of birds, many flying in from distant lands. As you enter the wetland, the guards tell you not to go beyond the second viewpoint. It is untamed territory, the domain of many wild animals, they warn.  However, all has not been well in this sanctuary of nature. In January 2024, the Uttar…

Similar Story

Lake Health Index reveals pollution concerns in Bengaluru’s water bodies

The citizen-driven Lake Health Index project assessed the condition of three lakes in the city: Ulsoor, Doddabommasandra and Shivapura.

Bengaluru grapples with a persistent water stress, worsened by the decline in rainfall, overexploitation of groundwater and decreasing Cauvery River levels. The water crisis has led experts and the government to reconsider using lakes as a source of water, either by storing treated wastewater or harvested rainwater. The draining of lakes, like Bellandur and Varthur, for desilting has contributed to a major part of the groundwater crisis in Bengaluru. However, with the upcoming monsoon predicted to be normal, there is a looming concern regarding the lakes in the city. The anticipated rains may bring one of the highest influxes of…