Suppose a house in Jaipur has a terrace area of 100 sqm and the average annual rainfall in Jaipur is 500 mm. If 80% harvested rainwater is lost due to evaporation, collection etc., calculate the amount of water harvested? PLZ ANSWER FAST...
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Answer:
Explanation:Naveen Lasiyal, Mohit Dave, Manohar L. Das, Pawan Soni, Rahul Yadav.
Department Of Civil Engineering Poornima Group of Institutions Jaipur, Rajasthan, India
Abstract:- Jaipur is one of the semiarid zonal cities in India. Depending on precipitation intensity, rainwater constitutes potential source of drinking water. Rainwater harvesting is the technology where surface runoff is effectively collected and stored. Harvested rainwater can then beused for drinking or for ground water recharge. Unless a proper water storage technique is used the rainwater harvesting may not be prominent. This paper deals with a case study of rain water harvesting system in residential societies in Jaipur city of Rajasthan state.
Keywords Rainwater harvesting, runoff, aquifer
INTRODUCTION
The reality of water crisis cannot be ignored. Jaipur has been notorious of being poor in its management of water resources. The demand for water is already more than the supply [1]. Majority of the population in Jaipur today are groundwater dependent. Other than municipal water supply, people use private tube wells to fulfill their daily water needs. As a result, the groundwater table is falling at an alarming rate. Extraction ofgroundwater is being done so uncontrollably that this has resulted in HydrologicalImbalance. Harvesting is an age-old system of collection of rainwater for future use. But systematiccollection and recharging of ground water, is a recent development and most common practice as one of the most feasible and easy to implement remedy to restore the ground water and prevent major water scarcity related issues. Water harvesting means a system that collects rainwater fromrainfall without allowing it to drain away. It includes the water collection from roofs and catchments of the buildings. There are several ways through which water can be harvest such as collecting run-off water from rooftops, collecting run- off water from local catchments and collecting flood water from local streams. Water harvesting systems developed by local communities and households can reduce the pressure on the state to provide the water and other resources needed for water supply. In addition, involving people will help them in collecting the water and burden on government funds got reduced.
The enormous need of water in Jaipur is a well-known fact. In spite of higher average annual rainfall in Jaipur (676 mm, 24 inches) as compared to the global average (800 mm,
32 inches) it does not have sufficient water [2]. From overall rain falling on the surface flows away rapidly, leaving very little water for the recharge of groundwater. Due to this, many parts in India do not possess sufficient water even for domestic uses. Surface water sources fail to meet the very high demands of water supply in urban areas; groundwater reserves are being tapped and over-exploited resulting into reduction in groundwater levels and reduction in groundwater quality. This precarious situation needs to be solved by fast recharging the damaged aquifers. Hence, the need for implementation of measures to ensure that rain falling over a region is tapped as fully as possible through water harvesting, either by recharging it into the groundwater aquifers or storing it for direct use.
Water harvesting is the deliberate collection and storage of rainwater that runs off on catchment areas which can be natural or can be manmade. Catchment includes rooftops, compounds, hill slopes or artificial land surface for collection of rain water[3]. The amount of water collected is dependent on the total frequency and intensity of the rainfall in that particular area, catchment characteristics, water demands and how much runoff occurs and how fast or easy the water can infiltrate through the subsoil and can percolate down to recharge the aquifers [4]. In urban areas, sufficient space for storage of rain water on surfaces is not available, water levels are very deep so that for recharging the aquifer we need extra rainwater, rooftop and runoff rainwater harvesting is ideal solution to solve the water supply problems.
Fig 1. Basic Layout of Roof Top harvesting
Answer:
Explanation:
Pawan Soni, Rahul Yadav, Manohar L. Das, Mohit Dave, and Naveen Lasiyal.
Poornima Group of Institutions Department of Civil Engineering Jaipur, Rajasthan, India
Abstract:- One of India's semiarid zone cities is Jaipur. Rainwater is a potential source of drinking water depending on the amount of precipitation. The method that effectively collects and stores surface runoff is called rainwater harvesting. Rainwater can then be used for drinking or to rehydrate the earth. Rainwater collecting may not be noticeable if the right water storage method isn't applied. This essay examines a case study of a rainwater collecting system used in residential communities in the Rajasthani city of Jaipur.
One cannot deny the existence of the water issue. Jaipur has a reputation for being poor in its management of water resources. The demand for water is already more than the supply
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