With the use of rainwater, there is a reduction in the consumption of drinking water and in the occurrence of floods.The water is a key ingredient for the survival of all living beings and is therefore essential to its conservation. Today, climate change, waste and pollution from rivers and lakes have made this substance scarce in many parts of the world. Therefore, measures aimed at saving and reusing water are extremely important to guarantee the population’s supply.
One of the ways to help save drinking water is through the use of rainwater , a technique used in several countries, including Brazil. Normally, water is collected from the roofs, with subsequent filtration and transfer to reservoirs ( see figure above ).
Rainwater, in most cases, is used for non-potable purposes, that is, for activities in which high-quality water is not required. Among the main uses, we can mention the irrigation of gardens and plantations, flushing in toilets, washing garages, sidewalks and vehicles; park cleaning and use by the fire department.
When using rainwater for these purposes, drinking water savings can be relatively high. Research indicates that in Japan, for example, rainwater use has decreased approximately 30% of drinking water consumption , a considerable saving.
In addition to the savings generated, the use of rainwater in large urban areas is related to the reduction of floods . When capturing, less water is accumulated in the large area impermeable by asphalt and cement.
Although the use of rainwater for consumption is not recommended, in many areas of Northeast Brazil this is already a reality. As this place suffers from a constant lack of water, the capture of rains has completely changed the lives of people in that area. Generally, water is collected from the roofs, undergoes filtration and chlorination and is stored in cisterns, which can then be used for consumption.
→ How can I enjoy rainwater at my house?
Even without a catchment system, you can use the rainwater in your home in several ways, using, for example, buckets and drums. Among the activities that can be carried out with stored water, we can highlight the cleaning of floors and sidewalks, irrigation of gardens and gardens, flushing in toilets and washing carpets and cars.