Rainwater Harvesting Essay Conclusion Example

Rainwater harvesting involves the collection and storage of rainwater into the natural reservoirs or artificial reservoirs in order to prevent the surface water runoff.

Essay on Rain Water Harvesting


We have provided variety of paragraph and essay on rain water harvesting under different words limit for the students. It is very important topic on which students may be assigned to write essay or paragraph on the rain water harvesting. You can select any rain water harvesting essay given below according to the need and requirement.

Rain Water Harvesting Essay 1 (100 words)

Rain water harvesting is a technique used for collecting and storing rainwater by using various means in different resources for the future use purpose (like cultivation, etc). Rain water can be collected into the natural reservoirs or artificial tanks. Another method of collection is infiltration of surface water into the subsurface aquifers before getting lost by surface overflow. Rooftop harvesting is also a method to collect rainwater. It is of big importance to the people living in the less rainfall areas. They can continue seasonal crop harvesting using collected rain water even in the lack of regular water supply. Whenever it rains, rain water gets collected into the man made ponds or tanks.


Rain Water Harvesting Essay 2 (150 words)

Rain water harvesting is the collection of rainwater into the man made resources or any natural resource like pond, lake, etc at the same place where it falls from rooftops or ground. Two main techniques of rainwater harvesting are storage for future use and recharge into the ground. It can be used for crop harvesting, gardening, toilets, etc. Following are the benefits of rainwater harvesting at individual or city-wide level:

  • It helps in reducing the water supply bills especially to the institutions.
  • Rainwater recharged to the ground positively affects groundwater quality by diluting fluorides, nitrates and its salinity.
  • It contains almost neutral pH and zero hardness which makes it more able to be used in homes, industries, institutions and other commercial establishments.
  • It may reduce the stress of public water supply sources.
  • Recharge of rainwater to the ground prevents sea-water immersion into the fresh water bodies in the coastal areas.
  • It helps in controlling urban flooding if people do rainwater harvesting from rooftops.
  • It reduces water demands of people from the municipality thus lessens energy consumption too in distributing water all through the city.

Rain Water Harvesting Essay 3 (200 words)

Rainwater harvesting means collecting the rain water into the natural reservoirs or man-made tanks. It is the technique to collect and store rainwater for various purposes in the future. The most common and easy method of rain water harvesting is the rooftop harvesting. Using this technique we can collect lots of clean rain water in the rainy season. It can be stored for long time for the household purposes like gardening, livestock, and irrigation, etc. Following are benefits of rain water harvesting:

  • It helps in reducing water supply loads and electricity bills of municipality, improve free water supply, crop production in rural areas, and thus lead to food security.
  • Rain water harvesting system helps in reducing the insecurity of households or individuals in the rural areas.
  • It provides easy and low cost water supply in the lack of water areas thus helps in food security and income generation.

Tamil Nadu is one of the states of India and now has been first Indian state where rainwater harvesting has been mandatory. Tamil Nadu state government has declared on 30th of May 2014 to establish around 50,000 rainwater harvesting structures at various places in the Chennai. Till now, approximately 4,000 of the temples in the Tamilnadu have rain water tanks serving at various rituals in temples and help in recharging the groundwater.

Rain Water Harvesting Essay 4 (250 words)

Every drop of rain water is like blessings of God to the people on the earth. Fresh rain water falls on the ground like pearls, so everyone should understand the importance of rain water especially in developing regions and rural areas lack of natural water resources. We should try to collect rain water without wasting through rooftops and along streets run off. We should bring our old traditional harvesting practices using new and effective technologies to make easy water supply in all the regions. As only hand pumps, wells, and other resources of groundwater levels cannot fulfill the potable water need of hundreds of thousands of people.

Rainwater harvesting is the most sustainable and effective way for many years to make water available in the areas lacking water. Rainwater harvesting is very low cost method along with lots of benefits. It helps in various purposes like household works, field irrigation, livestock, agriculture and animal husbandry.

It helps in rejuvenating the groundwater levels in both directly and indirectly manner. Groundwater level can be replenished by rain water harvesting methods of trenches, anicut, dug wells, contour, etc whereas other rain water harvesting methods like underground water tanks, ponds, etc help in reducing the use of groundwater for at least four to six months. It is very effective in the hilly regions and desert regions of the India and other countries. More and clean rain water can be collected in the rainy season by making large and clean water body.

Rain Water Harvesting Essay 5 (300 words)

Now-a-days, people have been depended on the government system of water supply for getting water for their every need. The present scenario of water management and distribution in the cities has been centralized by the government which has brought a big gap of community responsibility in water management. It has slowly but regularly finished the old traditional water harvesting system.

Rainwater harvesting is again a new but old and effective technique of collecting rain water during rainy season for future usage purpose. It is being frequently used in various places of India to overcome the problems of lack of water. Rain water harvesting is the good source of ground water recharge in natural way. However, the ground water level is getting less day by day because of the rapid urbanization and cities development at huge level as well as reduction in percolation of the rainwater to the ground. Rainwater harvesting is the way to reduce the use of ground water as well as maintain its level forever in the future. It is of more importance to the drought regions of India and other countries to supply the demands of water for various purposes. Following are mentioned points proving the fact why to harvest rainwater:

  • It plays great role in protecting the ground water decline and improving the ground water table.
  • It helps in improving the water quality in aquifers.
  • It is to conserve more water and prevent surface water runoff during the monsoon.
  • It helps in reducing the soil erosion.
  • It is to bring the old tradition of water conservation among people.

Rain water can be harvested in better way using following methods like surface runoff harvesting and roof top rainwater harvesting. Both are very effective methods help in enhancing the level of ground water and fulfill the need of water supply in easy and cost effective way.


Rain Water Harvesting Essay 6 (400 words)

Rainwater harvesting is the collection and storage of rain water in the natural resources or artificially designed resources to prevent water runoff and fulfill the lack of water in future. The quantity of water harvesting is affected by the number of factors like frequency of rainfall, quantity of rainfall, way of collecting rain water, and size of resources to collect water. The ground water level is getting depleted day by day due to various reasons like deforestation and ecological imbalance. Increasing level of urbanization and industrialization constantly increases the demand of water supply especially in the urban areas. It results in the overuse of ground water and thus going low level. The risk of water scarcity in the future has been increased to a great extent and can be life threatening if some effective solutions are not followed.

Water harvesting is very helpful and fulfill various need like recharging the ground water level, reduces electricity bill spend in supplying water and provide easy water supply anytime when required. It is estimated that 1 meter rise in the water level saves around 0.4 KWH of electricity.

Why Rain Water Harvesting is Necessary:

Rain water harvesting is very necessary to be practiced by the people in all regions. It is good to reduce the fear of water scarcity in the future. Following are the points proving the fact that why rain water harvesting is necessary:

  • Surface water cannot fulfill the demand of water for various purposes.
  • Everyone depend on the ground water for their every need.
  • Deforestation, rapid urbanization, rain water infiltration to the sub-soil, etc reasons are continuously decreasing the level of ground water.
  • Rain water conservation maintains the level of water in natural water resources.
  • It reduces the chance of flooding of water on the roads, reduces the risk of soil erosion and improves the quality of water.

Following are main techniques of rain water harvesting:

  • Collecting rainwater to the surface for future use.
  • Recharging the ground water.

Collecting rain water to the surface is very effective and traditional technique. It can be done using small ponds, underground tanks, dams, weirs etc. However, ground water recharging technique is a new concept of harvesting. It can be done using dug wells, pits, trenches, hand pumps, recharge wells, recharge shafts, recharge lateral shafts with bore wells, spreading technique (means spread of water to the stream, nala, etc).


Related Information:

Slogans on Rainwater Harvesting

Speech on Rainwater Harvesting

Save Water Essay

Save Water Speech

Essay on Water

Paragraph on Save Water

Speech on Water

Final Report: Rainwater Harvesting: A Simple Means of Supplementing California's Thirst for Water

EPA Grant Number: SU832493
Title: Rainwater Harvesting: A Simple Means of Supplementing California's Thirst for Water
Investigators: Chin, Andrew , Cusick, Roland , Guillen, Greg , Matsumoto, Mark , Ogunyoku, Temi , Tam, Kawai
Institution:University of California - Riverside
EPA Project Officer: Nolt-Helms, Cynthia
Phase: I
Project Period: September 30, 2005 through May 30, 2006
Project Amount: $10,000
RFA: P3 Awards: A National Student Design Competition for Sustainability Focusing on People, Prosperity and the Planet (2005) RFA Text |  Recipients Lists
Research Category:P3 Challenge Area - Water , Pollution Prevention/Sustainable Development , P3 Awards , Sustainability


Rainwater harvesting is the collection and storage of precipitation for later human use. This project focuses on the design, construction and analysis of a rainwater harvesting system located at the Bourns College of Engineering at the University of California, Riverside. The information collected from this project will be used to build a template for designing a rain water harvesting system that can be placed in areas outside of the Southern California region, with a specific look at the applicability of rain water harvesting in developing regions.

A preliminary mathematical model was created using Microsoft Excel that can be used to determine the potential volume of rainwater captured from an inputted rooftop area. Besides providing the volume of water that could be potentially collected from a rain event, the Excel model outputs the estimated total cost of installation and the amount of days harvested water can be used to irrigate a given lawn area. The collected data from the Phase I design will provide an opportunity to optimize the Excel model, taking into consideration local conditions and equipment costs.

Phase I funding was used to construct a harvesting system around one drain spout located at the Bourns College site. To come up with a preliminary design of the system the Excel model was used to come up with a tank size based on local rainfall data. The system includes a catch basin connected to a roof outlet, which flows over a weir and flow meter. An auto-sampler is also connected to the system to take grab samples. The water is tested for total suspended solids and total dissolved solids.

Summary/Accomplishments (Outputs/Outcomes):

The Phase I design provided information that can be used to design a more effective full scale system for the Bourns College. The Phase I design helped in the correction of many assumptions and provided real data in which to further optimize the overall system for Phase II. The issue of whether first flush was a water quality and an equipment issue was discussed from the beginning of project; where first flush is the initial flow of water from a given surface after a rain event.

An early assumption was that first flush diversion was not necessary due to the harvested water was only to be used for non-potable uses. However, the water quality data shows a spike in total suspended and dissolved solids in first flush water, while subsequent flow of water had very low levels. This data showed that first flush diversion must be done in order to avoid build up of solids in the tank and from solid build up later in the irrigation system. In order to alleviate the solids problem, the first flush will be diverted and treated by a sand filter before being flushed out of the system.

The data used in the Excel model to calculate the necessary tank size was based on average precipitation rates for the Riverside, CA area. The rainfall for the area during the collection period was about 5 inches, with the average rainfall being 8 inches per year. The less intense rainfall rate resulted in a lower amount of water that would have been collected and this is represented by a decreased flow over the weir and read by the flow meter. The 5 inches of rain over the collection area from the roof would correlate to the collection of 18,500 gallons of water over the entire rain period. The tank size required for the entire year based on this system is 600 gallons; the tank size is lower than the total collection volume due to the daily usage for irrigation needs. The system has the ability to provide 62 days of irrigation solely on harvested rain water, while providing 90 days of irrigation using blended water; where blended water is a combination of harvested rain water and city water. The calculation assumes that there is a one inch irrigation pattern during the winter and two inches during the summer, with no irrigation occurring during days of rainfall.


Rainwater harvesting is a viable option to supplement city water for non-potable human uses, such as irrigation. The overall efficiency of a rainwater harvesting system to supplement city water increases as area increases. The system would be highly effective in high commercial regions where there are warehouses and large buildings. These areas also contain less lawn area, so that the water can be used for uses beyond irrigation. In order to display the potential of the rainwater harvesting project for a heavy commercial area, Ontario, CA was chosen as a sample site. Ontario is an area with many commercial facilities, when all of the roof area is considered with the average annual rainfall at 16 inches, a total of 2,200 acre-feet per year of water can be collected, this can meet the demands of 10,000 people. In fact, the Toyota facility located in Ontario has a roof area of 380,000 square feet. When taking into consideration the average rainfall, this building has the ability to collect 3 million gallons of water. This single facility can not only meet the needs of the small patches of lawn surrounding the building, but can supply enough water for 41 people at 200 gpcpd or the water can be used to recharge groundwater levels.

The simplicity of the model and the low overall cost to install the system makes rainwater harvesting easily translatable for use in developing regions. The rainwater harvesting project was specifically chosen because of its potential to be used to help those in developing regions who do not have easy access to clean and local water sources. The water quality data shows that the water is clean for non-consumption purposes; although, a simple filtration system may have the ability to take the water into the potable range. The water collected from the harvesting system is actually cleaner than many water sources found in developing regions. In developing regions with a growing industry sector, water sources are often contaminated by outflow of waste from the facilities as many countries do not have stringent outflow laws. In areas with high populations, waterways used for drinking water are overdrawn and are used for purposes such as the cleaning of clothes and bathing. Rainwater harvesting can prevent the need to travel far distances to obtain water and can help the overall health and growth of communities.

Supplemental Keywords:

Rainwater, storm water, harvesting, best management practices, BMP, Southern California, sustainability, people, prosperity, planet, development, sustainability, irrigation, MWD, drinking water, groundwater, land, precipitation, chemical transport, health effects, ecological effects, cumulative effects, chemicals, toxics, particulates, metals, organics, DNAPL, NAPL, acid rain, effluent, discharge, dissolved solids, ecosystem, scaling, alternatives, sustainable development, clean technologies, innovative technology, renewable, waste reduction, waste minimization, public policy, community-based, observation, preferences, public good, socio-economic, conservation, environmental assets, environmental chemistry, social science, hydrology, modeling, monitoring, analytical, surveys, measurement methods, Southwest, Southern California, CA, EPA Region 4, EPA Region 7, EPA Region 8, EPA Region 9, buildings, schools, commercial, business, RFA, Scientific Discipline, Sustainable Industry/Business, Sustainable Environment, Technology for Sustainable Environment, Ecology and Ecosystems, Urban and Regional Planning, Environmental Engineering, urban planning, sustainable water use, environmental sustainability, recovery, conservation, cost benefit, sustainable urban environment, resource recovery, water conservation, rainfall harvesting, environmental cost analysis, environmental education

0 Replies to “Rainwater Harvesting Essay Conclusion Example”

Lascia un Commento

L'indirizzo email non verrĂ  pubblicato. I campi obbligatori sono contrassegnati *