Therefore, rain water is one of the purest sources of water available. Its quality almost exceeds that of ground or surface water. The rainwater does not come into contact with soil or rocks where it can dissolve minerals and salts nor does it come into contact with many of the pollutants that are often discharged into local surface waters or contaminate groundwater supplies.
The quality of rain water is depended on where it falls. Rainfall in areas where heavy industry or crop dusting is prevalent may not have the same purity as rain falling in other areas.
Rain water is soft and there is a less chance of detergents and soaps needed for cleaning. I love helping people and providing free education.
Will not be published Required. You can use these html tags: Tags essay rainwater harvesting. About the Author Sharoz Dawa. It will also stop the soil erosion. Rainwater harvesting also gives you a renewable natural source of water. There are two main methods of rainwater harvesting- surface runoff harvesting and rooftop harvesting. Surface runoff method is used mainly in the urban areas where the rainwater flows away as the surface runoff.
This runoff is then collected and stored and is used. It is also used for recharging aquifers with the help of proper methods. In the rooftop harvest method, rainwater is caught where it falls. Here, the roof becomes the catchments and the rainwater is collected from the roof of the house or the building. It can be either stored or can be diverted somewhere through a proper channel.
It can be used for artificial recharge system. Rooftop harvesting is effective and very economic. If used properly, it can also help in increasing the groundwater level of the area. However, the dirty roofs add to the hesitation of collecting water from rooftop. For the solution, numerous rain diverters or first flush devices are available in the market. They flush off or divert the first flow of water, hence removing the contaminants or bacteria from the harvested water that can be present in the water previously.
The regions with hot climate suffer the shortage of water most. This heat can be used for getting rid of the crisis in the region. The solar powered water purifiers uses zinc oxide and titanium oxide in the containers that are exposed to the ultraviolet radiations.
The water percolation in the water-impounded area of the check dams can be enhanced artificially manyfold by loosening the subsoil strata and overburden using ANFO explosives as used in open cast mining. Thus, local aquifers can be recharged quickly using the available surface water fully for use in the dry season.
The project collected thousands of gallons of rainwater, storing the water in six daisy-chained 12, gallons tanks. Rainwater harvesting is possible by growing freshwater-flooded forests without losing the income from the used, submerged land.
This would facilitate the availability of uncontaminated water for domestic, industrial, and irrigation needs. Good quality water resource, closer to populated areas, is becoming scarce and costly for the consumers. In addition to solar and wind energy, rain water is major renewable resource of any land. Vast area is being covered by solar PV panels every year in all parts of the world.
Solar panels can also be used for harvesting most of the rain water falling on them and drinking quality water, free from bacteria and suspended matter, can be generated by simple filtration and disinfection processes as rain water is very low in salinity.
Rainwater harvesting provides the independent water supply during regional water restrictions, and in developed countries, is often used to supplement the main supply. It provides water when a drought occurs, can help mitigate flooding of low-lying areas, and reduces demand on wells which may enable groundwater levels to be sustained. It also helps in the availability of potable water, as rainwater is substantially free of salinity and other salts.
Applications of rainwater harvesting in urban water system provides a substantial benefit for both water supply and wastewater subsystems by reducing the need for clean water in water distribution systems, less generated stormwater in sewer systems ,  and a reduction in stormwater runoff polluting freshwater bodies. A large body of work has focused on the development of life cycle assessment and its costing methodologies to assess the level of environmental impacts and money that can be saved by implementing rainwater harvesting systems.
Rainwater harvesting provides an independent water supply during water restrictions. In areas where clean water is costly, or difficult to come by, rainwater harvesting is a critical source of clean water. In developed countries, rainwater is often harvested to be used as a supplemental source of water rather than a main source, but the harvesting of rainwater can also decrease a household's water costs or overall usage levels. Rainwater is safe to drink.
Rainwater is also independent of salinity or pollutants found in ground water, increasing the quantity of potable drinking water available when rainwater harvesting is utilized.
When drought occurs, rainwater harvested in past months can be used. If rain is unpredictable, the use of a rainwater harvesting system can be critical to capturing the rain when it does fall. Many countries, especially those with arid environments, use rainwater harvesting as a cheap and reliable source of clean water. To enhance irrigation in arid environments, ridges of soil are constructed to trap and prevent rainwater from running down hills and slopes.
Even in periods of low rainfall , enough water is collected for crops to grow. Water can be collected from roofs, dams and ponds can be constructed to hold large quantities of rainwater so that even on days when little to no rainfall occurs, enough is available to irrigate crops. In addition, rainwater harvesting decreases the demand for water from wells, enabling groundwater levels to be further sustained rather than depleted.
Life-cycle assessment is a methodology used to evaluate the environmental impacts of a system from cradle-to-grave of its lifetime. The Economic and Environmental Analysis of Sanitations Technologies, EEAST model evaluates the greenhouse gas emissions and cost of such systems over the lifetime of a variety of building types. With the idea that supply of rainwater not only saves the potable water, but also saves the stormwater entering the combined sewer network thereby requiring treatment , the savings in environmental emissions were higher if the buildings are connected to a combined sewer network compared to separate one.
Rainwater harvesting systems can range in complexity, from systems that can be installed with minimal skills, to automated systems that require advanced setup and installation. The basic rainwater harvesting system is more of a plumbing job than a technical job, as all the outlets from the building's terrace are connected through a pipe to an underground tank that stores water. Systems are ideally sized to meet the water demand throughout the dry season, since it must be big enough to support daily water consumption.
Specifically, the rainfall capturing area such as a building roof must be large enough to maintain adequate flow of water. The water storage tank size should be large enough to contain the captured water.
For low-tech systems, many low-tech methods are used to capture rainwater: Before a rainwater harvesting system is built, use of digital tools is useful. For instance, to detect if a region has a high rainwater harvesting potential, rainwater-harvesting GIS maps can be made using an online interactive tool , or , to estimate how much water is needed to fulfill a community's water needs, the Rain is Gain tool helps.
Tools like these can save time and money before a commitment to build a system is undertaken, in addition to making the project sustainable and long lasting. Missions to six Caribbean countries have shown that the capture and storage of rainwater runoff for later use is able to significantly reduce the risk of losing some or all of the year's harvest because of soil or water scarcity.
In addition, the risks associated with flooding and soil erosion during high rainfall seasons would decrease. Small farmers, especially those farming on hillsides, could benefit the most from rainwater harvesting because they are able to capture runoff and decrease the effects of soil erosion. Frankfurt Airport has the biggest rainwater harvesting system in Germany.
The system helps save approximately 1 million cubic metres of water per year. The cost of the system was 1.
The system collects water from roofs of the new terminal which has an area of 26, square metres. The water is collected in the basement of the airport in six tanks with a storage capacity of cubic metres. The water is mainly used for toilet flushing, watering plants and cleaning the air conditioning system. Rainwater harvesting was adopted at The Velodrome — The London Olympic Park — in order to increase the sustainability of the facility.
Despite this, it was deemed that rainwater harvesting was a less efficient use of financial resources to increase sustainability than the park's blackwater recycling program.
Rain Water Harvesting Essay 6 ( 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.
Rain Water Harvesting as a method of utilizing rain water for domestic and agricultural use is already widely used throughout the world. It is a method which has been used since ancient times and is increasingly being accepted as a practical method of providing potable water in development projects throughout the world.
Essay # 4. Methods of Rainwater Harvesting: The different methods of rainwater harvesting are listed below: i. Rooftop Rain Water Harvesting, ii. Paved Surface Rain Water Harvesting, and. iii. Rain Water Harvesting Using Check Dams. i. Rooftop Rainwater Harvesting: In this method the first step involves the collection of rainwater . Essay rain water harvesting - commit your task to us and we will do our best for you Start working on your paper now with professional help presented by the company choose the service, and our experienced writers will do your order flawlessly.
Rain Water Harvesting Essay Rain Water Harvesting: A Solution To Water Crisis Water is an essential resource. No one can live and survive without water. Rainwater harvesting From Wikipedia, the free encyclopedia Rainwater harvesting is the accumulation and storage of rainwater for reuse before it reaches the aquifer. Uses include water for garden, water for livestock, water for irrigation, etc.