Water plays a major role in any agricultural activity. In India, groundwater levelshave fallen as much as 70 meters or more over the past 30 years. Assessments by the Central Groundwater Board, Government of India, show a dramatic change in share of tube wells in irrigated areas – from a mere 1% in 1960-61 to 40% in 2006-07. Efficient water conservation is therefore a natural step towards sustainability with respect to water resources. The goal at GEV was to create a system which could help us attain our goal without disturbing the existing ecology while keeping cost feasibility in mind. Therefore, we undertook a hydro-geological survey of the entire ecovillage to identify suitable recharge and discharge points. A recharge point is the ideal location to build rain water harvesting units to recharge the underground aquifers. A discharge point is the ideal location to draw underground water through open wells and bore-wells.
The entire process involved the following steps:
- Hydro-geological mapping – Geological features were studies to ensure ideal storage and movement of water to the subsurface.
- Employing geophysical techniques – Resistivity surveys were conducted at different locations within the GEV plot to identify the depths to water bearing
- Water Level monitoring of wells in the area – Measuring static water levels is important to ascertain the groundwater movement direction in the area
- Aquifer test – A pumping test was conducted to evaluate the properties of the basaltic aquifer in the area, helping us understand the quantity of groundwater in the area.
- Analysis of collected data – All the data collected in the field was systematically analysed to obtain specific information regarding the aquifer and the hydro-geological regime in the area.
For more details about the entire process please download our case-study here.