Question

With the help of a suitable sketch show the various methods of rainwater harvesting.

Answer 1

Rainwater harvesting involves collecting and storing rainwater for later use, primarily to reduce dependency on ground and surface water sources. There are several methods of rainwater harvesting, including:

1. Surface runoff harvesting: In this method, rainwater flows over surfaces and is collected in reservoirs, ponds, or tanks. It is then stored or redirected for various uses such as irrigation or groundwater recharge.

2. Rooftop rainwater harvesting: Water collected from rooftops is channelled through pipes to storage containers or tanks. The harvested water can be used for non-potable purposes such as irrigation or toilet flushing.

3. Infiltration wells: are shallow wells dug into the ground to allow collected rainwater to infiltrate and recharge groundwater levels.

4. Percolation pits or trenches: Pits or trenches filled with pebbles or other porous material allow water to percolate and recharge groundwater.

5. Rain gardens and bioswales: Vegetated areas or shallow trenches designed to capture and absorb rainwater while allowing it to infiltrate the soil.

Here is a diagram illustrating various methods of rainwater harvesting, including surface runoff, rooftop harvesting, infiltration wells, percolation pits, and rain gardens/bioswales. Let me know if you need further details or adjustments!