Why should one select rainwater harvesting as a topic for the project (10 reasons)?

Dnyan Deshmukh

Staff member
I do not have much idea or reasons for why should one choose for doing project on rain water harvesting but i have few to state.

Rain water harvesting will increase the ground water table which supports all life forms in that area as life without water is unimaginable.
The Forrest of concrete structures does not allow water to go down under ground, which flows from the top and can create a deadly situation in few hours of heavy raining (this year, in Pune many lost there lives due to flooding in City areas). The water find its own and easiest route to move on, which is to get pass from roads instead of going down.

With increased construction ground water levels are going down and down which is most important matter of research to save the water.
 

amd007

Elite Member
Rainwater harvesting is the process of accumulation and storage of rainwater for reuse rather than allowing it to runoff and turn useless.

The different methods of rainwater harvesting include:
  • Rooftop rainwater harvesting
  • Surface runoff harvesting
  • First, flush
  • Transportation
  • Catchment
  • Filter
Rainwater harvesting is a sustainable process that helps in preserving water for future needs. Water scarcity is a major concern in today’s scenario. The process of rainwater harvesting is a good way to conserve water.

Rainwater harvesting systems consists of the following components:
  • Catchment- Used to collect and store the captured Rainwater.
  • Conveyance system – It is used to transport the harvested water from the catchment to the recharge zone.
  • Flush- It is used to flush out the first spell of rain
  • Filter – Used for filtering the collected Rainwater and remove pollutants
  • Tanks and the recharge structures: Used to store the filtered water which is ready to use.
The process of rainwater harvesting involves the collection and storage of Rainwater with the help of artificially designed systems that run off naturally or man-made catchment areas like- the rooftop, compounds, rock surface, hill slopes, artificially repaired impervious or semi-pervious land surface.

Several factors play a vital role in the amount of water harvested. Some of these factors are:
  • The quantum of runoff
  • Features of the catchments
  • Impact on the environment
  • Availability of the technology
  • The capacity of the storage tanks
  • Types of the roof, its slope, and its materials
  • The frequency, quantity and the quality of the rainfall
  • The speed and ease with which the Rainwater penetrates through the subsoil to recharge the groundwater.

The advantages of rainwater harvesting are:
  • It is cost-effective
  • Conserves water
  • A source of water for landscape irrigation
  • It is a simple method and easy to practice.
  • It reduces soil erosion and pollution of water bodies due to fertilizers and pesticides.
The benefits of rainwater harvesting system are listed below.
  • Less of cost
  • Helps in reducing the water bill
  • Decreases the demand for water
  • Reduces the need for importing water
  • Promotes both water and energy conservation
  • Improves the quality and quantity of groundwater
  • Does not require a filtration system for landscape irrigation
  • This technology is relatively simple, easy to install and operate
  • It reduces soil erosion, stormwater runoff, flooding, and pollution of surface water with fertilizers, pesticides, metals, and other sediments.
  • It is an excellent source of water for landscape irrigation with no chemicals and dissolved salts and free from all minerals.
The Disadvantages are:
  • Regular Maintenance is required
  • Requires some technical skills to install
  • Limited and no rainfall can limit the supply of Rainwater
  • If not installed correctly, it may attract mosquitoes and other waterborne diseases.
  • One of the significant drawbacks of the rainwater harvesting system is storage limits.
How much does it cost?

When a community comes together to harvest rain, the per-capita investment goes down. For instance, Panchsheel Park Colony about 1000 residents pooled in
Rs 4.5 lakh to harvest more than 170 million liters of water annually.

Read further thread for more information .....http://www.rainwaterharvesting.org/urban/Costs.htm