hi guys !!!
here goes my question : write a essay on rainwater harvesting in 300 words
Answers
Answer:
Rainwater harvesting (RWH) is the collection and storage of rain, rather than allowing it to run off. Rainwater is collected from a roof-like surface and redirected to a tank, cistern, deep pit (well, shaft, or borehole), aquifer, or a reservoir with percolation, so that it seeps down and restores the ground water. Dew and fog can also be collected with nets or other tools. Rainwater harvesting differs from stormwater harvesting as the runoff is collected from roofs, rather than creeks, drains, roads, or any other land surfaces.[1]: 10 Its uses include watering gardens, livestock,[2] irrigation, domestic use with proper treatment, and domestic heating. The harvested water can also be committed to longer-term storage or groundwater recharge.[3]
Explanation:
In regards to Urban agriculture, rainwater harvesting in urban areas reduces the impact of runoff and flooding. The combination of urban ‘green’ rooftops with rainwater catchments have been found to reduce building temperatures by more than 1.3 degrees Celsius.[5] Rainwater harvesting in conjunction with urban agriculture would be a viable way to help meet the United Nations Sustainable Development Goals for cleaner and sustainable cities, health and wellbeing, and food and water security. The technology is available, however, it needs to be remodeled in order to use water more efficiently, especially in an urban setting.
Kenya has already been successfully harvesting rainwater for toilets, laundry, and irrigation. Since the establishment of the country's 2016 Water Act, Kenya has prioritized the regulation of their agriculture industry. [6] Additionally, areas in Australia use harvested rainwater for cooking and drinking.[5] Studies done by Stout et al researching the feasibility in India found RWH was most beneficial used for small-scale irrigation, which provides income with the sales of produce, and overflow used for groundwater recharge.[5]
Missions to five 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.[7]
Many countries, especially those with arid environments, use rainwater harvesting as a cheap and reliable source of clean water.[8] 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.[9] 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
essay on rainwater harvesting in 300 words ( plz like)
Rainwater harvesting is the process to save and store rainwater that can be used for various purposes. The idea behind the rainwater harvesting is to prevent the rainwater from running off and storing it in tanks or ponds so that it can be used later. This method is very helpful to combat the water scarcity problems presently prevailing in India. So we must promote this practice to have access to clean water without much cost.
Significance of Rainwater Harvesting implies that it is a very economical and easy practice to follow. Considering the water scarcity across the globe, it is the need of an hour to start doing rainwater harvesting.
As we know, that we do not have much surface water left to meet our ever-increasing demands of water, therefore it is very important to realize the benefits of rainwater harvesting. We can get additional water by preventing rainwater from running off.
Also, groundwater levels are decreasing day by day as more number of people living in flats and houses are using submersible pumps to use the groundwater. There are many other reasons behind groundwater depletion including deforestation, urbanization, high population, and much more.
There are basically two types of rainwater harvesting namely surface runoff harvesting and rooftop harvesting. In a surface runoff method, we make a path from the surface to a storage place like tank or pond. When it rains, a large amount of water on the surface is directed to the pond and is used for various purposes.
In rooftop rainwater harvesting, the roof of a building acts as a collection component for rainwater. The roof is equipped with pipelines that directly open into a tank. The rainwater when falls on the roofs are diverted into the tanks thus preventing the water from falling off. Thus, rainwater harvesting is a very economical method that saves water and also prevents it from logging on the roads.