Rainwater harvesting is the process of collecting rainwater through a variety of methods. It has been made illegal in some places and treated like trash by others, but its importance cannot be ignored as it can mitigate drought conditions and help to protect our water supplies.

The “importance of rainwater harvesting” is the collection and storage of water that falls on the ground. Rainwater harvesting methods can include both passive and active systems. The importance of rainwater harvesting is to provide a source of drinking water for people, livestock, plants, or anything else that needs it.

Rainwater Harvesting Methods, Importance, Conclusion

We have written an essay on Rainwater Harvesting Methods, their history, relevance, application, present status in India, and Conclusion in this article.

What is Rainwater Harvesting and How Does It Work?

Rainwater harvesting is the collection and storage of rainwater for reuse on site while preventing runoff. We may collect it in a variety of locations, such as a river or a roof, and divert it to a well, bore well, shaft, reservoir with percolation, aquifer, and so forth.

We utilize it for garden watering, cattle drinking, irrigation, and home usage after sufficient treatment. It is one of the earliest and most basic techniques of domestic water self-supply.

Rainwater harvesting has a long and illustrious history.

Rainwater harvesting dates back to the Neolithic period, when waterproof receptacles for storing rainwater were created on the floors of dwellings and villages around the Mediterranean Sea in the west, the Arabian Desert in the south, and Mesopotamia in the east. By 4000 BC, cisterns had become an important aspect of regulating the water supply in the homes.

Many instances exist, such as the Greek island of Crete, which had enormous cisterns for rainwater gathering from 2600 BC to 1100 BC. Rainwater collecting was common throughout the Roman Empire, and it grew in tandem with the empire’s development. Rainwater gathering was essential in Venice.

Also see – Essay on Water Conservation

New Methodologies


RainSaucer, which is similar to an upside-down umbrella, is one of the new rain collecting technologies being developed. Rainwater is gathered directly from the sky in this location. As a result, pollution is reduced, and rain saucers may be used to provide drinkable water in underdeveloped areas.

The GroasisWaterboxx, a Dutch invention, may also be used to grow trees using rainwater and dew that has been collected and stored.

They construct check dams across streams to improve surface water percolation into the subsurface layers. The percolation of water inside the check dam’s water-impounded region is sometimes artificially augmented by loosening the subsurface layers and overburden using ANFO explosives used in open-cast mining. As a result, local aquifers are often replenished swiftly utilizing surface water that is entirely used during the season. 

One of the main goals of rainwater collecting is to utilize locally accessible rainwater to satisfy water needs throughout the year without requiring a large upfront investment. 

Water resources of good quality that are closer to inhabited regions are becoming limited and expensive for users. Rainwater is a fundamental natural resource of any property when it comes to solar and wind energy. Solar PV panels cover a wide area every year in all regions of the world.

Because rainfall is low in salinity, solar panels may also be used to gather the majority of the precipitation that falls on them, and drinking grade water, devoid of germs and suspended debris, is commonly obtained by simple filtering and disinfection methods.

In India, cost-effective rainwater collecting inside already-dug wells has just been shown to be very active in raising spring water levels.

Rainwater Harvesting Benefits

Rainwater collecting offers an independent water system amid regional water constraints, and it is often used to augment the most supply in affluent nations.

When there is a drought, it contains water, which may assist alleviate floods in low-lying regions and lessens pressure on wells, allowing groundwater levels to be maintained. It also improves the availability of drinkable water by removing saltiness and other salts from rainfall.

The development of life cycle assessment and associated pricing approaches to estimate the extent of environmental impacts and money saved by adopting rainwater collecting systems has sparked a huge amount of research.

During water shortages, rainwater collection offers a self-contained water system. Rainwater collecting may be a significant supply of unpolluted water in locations where clean water is costly or difficult to come by.

Rainwater is frequently captured as a secondary supply of water in affluent nations, rather than as the major source. Rainwater collecting may, however, reduce a household’s water expenses or total use levels. It is safe to drink rainwater.

When a drought strikes, rainfall collected over the previous months is often utilised. When rain is sparse yet unpredictable, a rainwater collecting system is typically necessary to capture the rain when it does fall. Rainwater collecting is used by many nations with dry climates as a cheap and dependable supply of unpolluted water.

In desert regions, soil ridges are built to catch and restrict precipitation from going downhills, so enhancing irrigation. They gather enough water for crops to grow even when there isn’t much rain. Roofs are often used to collect water, and tanks are frequently built to hold large amounts of rainfall.

Rainwater Harvesting: Application or Use

Agriculture is number one.

Rainwater collection in urban settings lowers the effect of runoff and floods in urban agriculture. Building temperatures are reduced by 1.3 degrees Celsius when a combination of urban “green” roofs and rainwater catchments is used.

Rainwater collection in conjunction with urban agriculture would be a realistic option for achieving the United Nations Sustainable Development Goals of cleaner, more sustainable cities, improved health and well-being, and food and water security. 

The technology exists; however, it has to be updated to make better use of water, particularly in metropolitan areas. Rainwater collection has been beneficial in Kenya for bogs, laundry, and irrigation, and rainwater gathering has also been successful in Australia for cooking and drinking.

Stout et al. conducted feasibility studies in India and discovered that RWH was best employed for small-scale irrigation, which generates revenue from crop sales and provides overflow for groundwater recharging.

2. Use in the Home

Rooftop rainwater collection is used to provide beverage, residential water, water for cattle, water for small irrigation, and to restore groundwater levels in China, Argentina, and Brazil.

The most important rooftop rainwater gathering initiatives are taking place in Gansu, China, and semiarid northeast Brazil. Rainwater collection is used by around 40% of Thailand’s rural population. 

During the 1950s, the government pushed extensive rainwater gathering. After government financing for the collection tanks ran out in the 1990s, the private sector stepped in and delivered several million tanks to private houses, many of which are still in use today. This is one of the most important examples of water self-supply in the world. 

Rainwater harvesting is required for all new residences constructed in the state capital of New Mexico, Santa Fe. 

A nuisance tax exemption is available in Texas for the purchase of rainwater harvesting equipment. Irrigate butts are often seen in household gardens and on allotments in the United Kingdom to collect rainwater, which is subsequently used to water the garden.

3. Application in Industry

The rainwater collecting system at Frankfurt Airport is the most essential in Germany. Every year, the system saves around 1 million cubic meters of water. In 1993, the system was worth 1.5 million dm.

This method gathers water from the new terminal’s roofs, which cover a total area of 26,800 square meters. It gets water in six tanks with a total storage capacity of 100 cubic meters in the airport’s basement. We generally utilize water to flush the toilet, irrigate plants, and clean the air conditioning system. 

Rainwater harvesting was used at The Velodrome in the London Olympic Park to ensure the power’s long-term viability. Despite this, rainwater gathering was found to be a less effective use of financial resources for achieving sustainability than the park’s blackwater recycling program.

Rainwater Harvesting Quality

Rainwater may need to be carefully analyzed and used in accordance with its safety. Sun water disinfection is utilized in Gansu, for example, by boiling gathered rainwater in parabolic solar cookers before it is used for drinking.

While rainfall is frequently a cleaner supply of water than groundwater or water from rivers or lakes, the technique of collecting and storage often pollutes and renders the water unfit for human use.

Pre-filtration is a standard industrial procedure for keeping the system healthy and ensuring that the water entering the tank is clear of big sediments. A water system should, in theory, match the standard of water with the highest consumption. 

In most modern countries, however, high-quality potable water is used for all purposes. Rainwater with competent preparatory filtering methods for nonportable water applications like toilet flushing, irrigation, and washing might potentially be an important element of a long-term water management plan.

India’s Rainwater Harvesting

The initiative was introduced in 2001 and has since been implemented in all of Tamil Nadu’s rural districts. Rainwater harvesting is promoted via posters across Tamil Nadu, particularly rural regions. The official website of the state of Tennessee.

Within five years, it had produced remarkable results, and every state gradually adopted it as a job model. In the five years after its installation, Chennai’s water level has risen by 50%, and the water quality has greatly improved. 

Karnataka: In Bangalore, rainwater harvesting is required of every owner or occupant of a structure with a location area measuring the Bangalore water system and Sewerage Board has begun and developed. Rainwater collecting has been performed by the residents of the Thar Desert in Rajasthan for centuries. 

Maharashtra: Rainwater harvesting is now required for every new housing society to be established in Pune. Rainwater harvesting is not required in Mumbai, Maharashtra. The Mumbai municipal government is working to make rainwater collection mandatory for major businesses.


Rainwater harvesting is an environmentally beneficial method of conserving water. It also raises ground water levels. Effective use of this strategy aids in the preservation of our planet. I hope you found this information about rainwater collection to be useful.

The “methods of rainwater harvesting wikipedia” is a website that has information on the different methods of rainwater harvesting. The article will also include a conclusion.

Frequently Asked Questions

What is the importance of rain water harvesting conclusion?

A: Rain water harvesting is beneficial because it can help reduce flood risk, which saves people and property. It also helps to maintain the ecological balance of our planet by providing a source of clean drinking water that isnt contaminated with sewage or industrial waste runoff.

What is the importance of rain water harvesting?

A: The importance of rain water harvesting is that it can be used to drive filtration systems which are able to remove pollutants, bacteria, and particulate matter from the air.

What is the conclusion of rain?

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Simon Jameson

Simon Jameson is an expert reviewer at icfamwell.org and has been with us since 2017. Trust his reviews as he is also a regular user of all products that he reviews.

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