Action research on implication of harvested rainwater in recharging shallow groundwater aquifer and its quality
Groundwater has now become a major natural resource contributing the water supply system in Kathmandu Valley and people have been using groundwater since ages through dug wells and stone spouts (dhunge dharas). As a result of thoughtless exploitation of shallow groundwater aquifer, the depletion in the shallow aquifer and availability of the resource can easily be observed through drying up of ancient wells, stone spouts and ponds. Usually groundwater gets recharged during rainfall period. Due to urbanization, surface infiltration has been vastly reduced while consumption of groundwater is ever rising.
This action research has been designed to recharge shallow groundwater aquifer through rainwater harvesting. This project will carried out in three phases, viz:
1. Selection and monitoring of potential sites for recharge,
2. Installation of recharge structures in the selected location
3. Post project monitoring for the impact study
Update: April 2009
25 dug wells and 25 recharge pits have been installed in the selected areas of 5 wards of LSMC (i.e. wards 7, 8, 18, 19 & 20)