Client

ASCI

Location

Banjara Hills

Type

Site Area

79,034 sq. meters

Rooftop Area

13,039 sq. meters

Annual Rainwater Potential

6.4 cr litres

Result - Savings Annually

45063585
Rainwater saved

9012300 rupees
Monetary savings

8193 Water Tankers Saved

Problem

The ASCI campus is situated on rocky terrain, which limits natural groundwater recharge. Among the six existing borewells, only EB1 and EB3 are functional, while EB2 and EB5 operate only seasonally, and EB4 and EB6 are non-functional or failed. Rooftop runoff across campus is currently discharged into open spaces without any harvesting mechanism. Of the rainwater harvesting pits present, two built by HMWSSB are heavily silted and underperforming, while four others are completely defunct. The daily water demand on campus is around 1,50,000 liters, with additional usage for landscape irrigation during summer. A significant dependency exists on HMWSSB supply and borewells, yet the recharge infrastructure is inadequate, inefficient, or in disrepair.

Solution

To improve groundwater sustainability, a series of interventions are proposed. For the Main Hostel Block, it is recommended to connect all rooftop pipes towards the southeast and install injection borewells with recharge pits (10 feet deep, 4 feet in diameter) near the entrance and central section, each connected through silt chambers. An existing recharge pit in the area will also be revitalized by installing an injection borewell within it. In the Staff Quarters, a new 1,00,000-liter sump is proposed near the existing tank, along with converting a small existing pit into a silt trap. The existing recharge pit will be cleaned and equipped with an injection borewell and recharge pit to receive overflow from the sump. Additionally, a cut-off trench will be constructed along the sloped road near the south gate, connected via a silt chamber to a new recharge pit and injection borewell. These upgrades aim to maximize rainwater harvesting, enhance aquifer recharge, and reduce dependence on external water sources.