World 1 leritage sites like Rani ki Vav in Gujarat is a prime example of step wells which were built in the drier regions of India. Rain water harvesting ie natural water storage or man-made tank rain water is to be collected. Houses or buildings with sloping roof can install gutters on the edges to collect the rain water harvesting essay rain and to carry it to the destination using pipes or artificially created ditch, rain water harvesting essay. In this Drug Addiction Essay, we had described drug addiction, its adverse effects; different types of drugs that are produced has different effects. Maintains rain water storage in natural water resources. In both ways, it helps in increasing the ground water level, as well as helps in an affordable and easy water supply system to meet various needs.
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Essay 1. Definition of Rainwater Harvesting: Rainwater harvesting refers to in general, to the collection and storing of locally available water, mostly from the rains at a place. The main criterion here is the quantum of water involved and the area of influence. Rain water harvesting essay harvesting is common in areas having high rainfall intensity well distributed in the year. Such areas include, Himalayan areas, North Eastern States, Andaman and Nicobar Islands, Lakshadweep Islands, Rajasthan and the Southern parts of Kerala and Tamil Nadu. Rain water harvesting is now being-increasingly used for meeting the drinking water needs of rural areas particularly during the periods of drought, rain water harvesting essay. Many methods are available for harvesting rain water.
The choice of a method depends rain water harvesting essay the suitability of a particular site. Essay 2, rain water harvesting essay. Importance of Rainwater Harvesting: i. Quantity of water available is fixed. Essay 3. Objectives of Rainwater Harvesting: i. To restore supplies from aquifer due to over explorations, rain water harvesting essay. Essay 4. Methods of Rainwater Harvesting: The different methods of rainwater harvesting are listed below:. In this method the first step involves the collection of rainwater from the Rooftops. A network of drain pipes transports the rain water from the rooftops to a designed sump.
The sump houses a filter unit. Hence, rain water harvesting essay, as soon as the rainwater enters into the sump it first gets filtered and then remains in the sump. Then with the help of a pump the water can be pumped to an overhead tank for future use. It can be suitability adopted and implemented in new building constructions, houses, factories, schools, etc. Rooftops should be designed keeping in mind rain water harvesting. Roof should be given sufficient slope to drain water. Sufficient number of down pipes should be provided. The downpipe should be preferably of P. as per national building code. and mm pipe for an area of 85 sq. The water should be filtered before collection.
A small tank of size 40 cm diameter filled with charcoal and gravel may be used as a filter chamber as shown in the Fig. If the conventional building practice is to build a sump, the same rain water harvesting essay can be used for harvesting rain water. In Bangalore for example, construction of a sump is a common building practice. Collecting rain water after filtration in the sump would be cost effective. If a well or a bore well is present in the premises then rain water can be used to recharge the ground water after filtration. Just below the roof Fig. However, some skill is required in designing such a storage system. On the ground Fig, rain water harvesting essay. However, it may restrict movement on small sites as storage occupies space.
Below the ground Fig. However, water needs to rain water harvesting essay pumped up and cleaning of sumps is a necessity. Typically sumps are the most favoured solution. Harvested rain water can be used for non-potable purposes like gardening, bathing, flushing and washing clothes. Can also be used for potable purpose only after ensuring quality and when there is no alternative source or the alternative source is contaminated. In this method the first and foremost requirement will be to keep the paved surfaces clean. The contour map of the locality is studied and the point having the least contour value is then selected. Then a network of drains will carry the rain water from the point to the storage facility. The slope of the pavement is also a crucial factor in the collection rain water harvesting essay. In this method check dams are constructed in areas where availability of water is scanty from surface and sub-surface sources.
Check rain water harvesting essay are small barriers built of sand or stones across the direction of water flow on shallow rivers and streams during the periods of excess water flow. During monsoon periods these rain water harvesting essay the excess water in a small catchment area, thus satisfying the water requirements and replenishing the ground water table. Essay 5. Purposes of Rainwater Harvesting: i. Rain water is a natural source, which is presently being wasted. Rain water technique can be effectively used to prevent the water-logging of low-lying areas or in other words for flood control. Owner-operated and managed.
Reduced dependence on external sources such as bore wells tankers. Essay 7. Implementation of Rainwater Harvesting: Preliminary Feasibility Study:. The first step in designing a rainwater harvesting scheme is a preliminary feasibility study, which involves site visit and inspection. EssayEssay on Rainwater HarvestingGeologyRainwater Harvesting. Article shared by : Related Articles: Essay Solar Ponds Artificial Ponds Energy Management Essay on Fishery: Types, Potentiality and Success. Essay on Psychology: Scope, Tasks and Study Essay Psychology. Essay on General Agreement on Tariffs and Trade GATT. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits.
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Rainwater Harvesting is a form of harvest in which rainfall is gathered and deposited for potential use instead of being allowed from getting washed out. Rainwater can be collected from rivers or dome to a bottomless pit well, pipe, or borer , aquifer, percolated pond or collected from dew or fog with filets or other devices. The uses include greenhouse water, cattle irrigation, household use, indoor heating for houses, etc. The extracted water can also be used as drinking water, for long-term storage and other uses, including irrigation of groundwater. India has received significant water supplies from nature.
We have seasonal rivers like the Ganga, Brahmaputra, Yamuna, Beas and others with their affluent and distributors, in the north and eastern India. In central and peninsular India, we have spring and rain-fed rivers like the Godavari, Krishna, Narmada, Tapti and Kaveri. Notwithstanding these immense available water supplies, we face a countrywide water crisis. However, the groundwater level is reducing day-to-day resulting from rapid urbanization and development of cities on a large scale in addition to a discount within the quantity of rainwater. Rainwater harvesting is the way in which to reduce groundwater use in addition to at all times preserve its degree sooner or later. In the dry areas of India and different nations, it is extra necessary to fulfil the demand for water for various functions.
Rainwater harvesting is the accumulation, storage, conservation, and filtration of rainwater in the future for drinking water or for many other uses; the stored rainwater has to be maintained regularly. The main objective of rainwater harvesting is to collect rainwater from a large surface above and then transport it to the storage tanks through the distribution system. Rainwater harvesting provides an independent supply of water during most water combinations, where clean water is expensive for people in rural areas, accumulated water will be a cheaper source of potable water and can be stored for a longer period. In developed countries, accumulated rainwater is a source of supply and also reduces the cost of domestic water consumption.
In a fluctuating climate, a rainwater harvesting system helps to capture rainwater when it rains. Most countries with unpredictable environment use rainwater harvesting as it is an economical and reliable source of salinity and salts-free clean water. Rainwater is used exclusively for irrigation facilities; soil ridges are made to trap rainwater and prevent slopes, providing enough water for crops to grow. In future, dams and ponds can be constructed for storing large amounts of water for irrigation of crops, retaining wall are provided to avoiding landslides.
Due to rainwater harvesting, less water is directed towards the sewer system and it reduces stormwater in freshwater bodies, also prevents pollution of water bodies. In many areas, underground water sources are slowly sieving. Construction of deep wells is costly and can harm the natural environment. Thus, this source of rainwater is reliable and effective, can be used when the groundwater supply is depleted. Also, read 1. Water Pollution Essay 2. Rainy Season Essay 3. Water Conservation Essay. 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.
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. 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:. 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. Rainwater Harvesting is a method of storing rainwater, to be used in several domestic and agricultural activities. The basic idea is to not let the rainwater runoff and get wasted, rather to collect it by simple mechanism so that it can be used during scarcity of water.
In the following essay we will explore the importance of rainwater harvesting, its methods and systems and how it is traditionally done in rural India. Surface runoff is a term used for precipitation that falls on the surface of earth and is subsequently lost to the environment. If elaborate arrangements are made to collect surface runoff water by providing it a path into a pond or tank; gallons of water could be stored to be used for several activities. If designed efficiently, a system to collect surface runoff water can collect huge quantities of runoff from roads, parks, and gardens etc enough to sustain a small community or even a city.
However, runoff water contains impurities; therefore, it must be passed through filtration process before it could be reused. In roof top rainwater harvesting, the roof of a house or building functions as a catchment area for collecting rainwater. The water falling on the roof is diverted through a network or pipes to the desired pit or tank. It is by far the most economical and easy method of rainwater harvesting. Houses or buildings with sloping roof can install gutters on the edges to collect the falling rain and to carry it to the destination using pipes or artificially created ditch. Though, care must be taken to flush out the water collected from first rain as it contains soluble impurities. In some places in India, still very traditional and ancient methods of rainwater harvesting are followed.
These methods have proved successful in past and are still used in rural as well as urban India. Some of the significant traditional methods of rainwater harvesting in India are listed below-. This traditional method of rainwater harvesting is followed in tropical belt of southern states of Karnataka and Kerala. These regions are rich in laterite soil with naturally occurring depressions with three high sides. The three sides automatically function as the catchment area for collection of water in the depression. A small dam is constructed on the low lying fourth end of the depression to contain the runoff. Surangas are traditional water harvesting system only used in Kasargod district of south Indian state of Kerala.
The soil found in this region is hard laterite which is favorable for the construction of suranga cave. Suranga is like a horizontal cave excavated in hilly terrain of the area, through which water oozes out and is thus collected in a pond. Though, this method is locally being used since centuries, it is sadly now gradually being replaced by bore wells. Taankas are part of a traditional rainwater harvesting method practiced in the western state of Gujarat. Taankas are basically underground reservoirs with a capacity of storing thousands of liters of rainwater. Water stored in a taanka is sealed against sunlight and therefore remains fresh for years. Rainwater harvesting provides an independent source of water supply during the scarcity of water.
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