“Rain water harvesting is a low cost and eco friendly
technique for preserving every drop of water”. Explain.
Answers
Answer:
Advantages of Rainwater Harvesting
1. Easy to Maintain
Utilizing the rainwater harvesting system provides certain advantages to the community. First of all, harvesting rainwater allows us to utilize an energy resource better. It is essential to do so since drinking water is not easily renewable, and it helps in reducing wastage. Systems for the collection of rainwater are based on simple technology.
The overall cost of their installation and operation is much lesser than that of water purifying or pumping systems. Maintenance requires little time and energy. The result is the collection of water that can be used in substantial ways, even without purification.
2. Independent Water Supply
Rainwater harvesting provides an independent water supply where clean water is costly or difficult to come by. Rainwater harvesting is a critical source of clean water and increases the quantity of potable drinking water available.
In developed countries, rainwater is often harvested to use as a supplemental source of water rather than the main source. Still, the harvesting of rainwater can also decrease overall usage levels.
3. Reducing Water Bills
Water collected in the rainwater harvesting system can be put to use for several non-drinking functions as well. For many families and small businesses, this leads to a large reduction in their utility bill.
On an industrial scale, harvesting rainwater can provide the needed amounts of water for many operations to take place smoothly without having to deplete the nearby water sources.
It also lessens the burden of soil erosion in a number of areas, allowing the land to thrive once again. In fact, it can also be stored in cisterns for use during times when water supplies are at an all-time low.
4. Suitable for Irrigation
As a matter of fact, there is little requirement for building new infrastructure for the rainwater harvesting system. Most rooftops act as a workable catchment area, which can be linked to the harvesting system. This also lessens the impact on the environment by reducing the use of fuel-based machines.
Rainwater is free from many chemicals found in groundwater, making it suitable for irrigation and watering gardens. In fact, storing large reservoirs of harvested water is a great idea for areas where forest fires and bush fires are common during summer months.
5. Reduces Demand on Ground Water
With an increase in population, the demand for water is also continuously increasing. The result is that many residential colonies and industries are extracting groundwater to fulfill their daily demands. This has led to the depletion of groundwater which has gone to a significantly low level in some areas where there is huge water scarcity.
Rainwater harvesting enables groundwater levels to be further sustained rather than depleted.
6. Supplemental in Drought
Many countries, especially those with arid environments, use rainwater harvesting as a cheap and reliable source of clean water. When drought occurs, rainwater harvested in past months can be used.
In arid environments, ridges of soil are constructed to trap and prevent rainwater from running down hills and slopes and enhance irrigation. 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 water is available to irrigate crops.
7. Reduces Floods and Soil Erosion
During the rainy season, rainwater is collected in large storage tanks, which also helps in reducing floods in some low lying areas. Apart from this, it also helps in reducing soil erosion and contamination of surface water with pesticides and fertilizers from rainwater run-off, which results in cleaner lakes and ponds.
8. Rainwater for Drinking Purpose
Rainwater keeps the environment green and conducive to live in. Rainwater is also independent of salinity or pollutants found in groundwater. If the rainwater is properly harvested with the right sized system and equipment, it can be used for drinking purpose.
9. Several Non-drinking Purposes
Rainwater, when collected, can be used for several non-drinking functions, including cooking, bathing, flushing toilets, washing clothes and utensils, watering the garden, washing cars etc. It is unnecessary to use pure drinking water if all we need to use it for some other purpose rather than drinking.
It can also be used for farming and in industries that require large amounts of water for production processes.
Explanation:
It is a low cost and eco - friendly technique for presenting every drop of water by guiding the rain water to bore well,pits and wells.Rainwater harvesting increase water availability,check the declining groundwater table,improve ane quality of groundwater control soil erosion and flooding