Because of overpopulation many cities in both developing and underdeveloped countries are fast approaching a water crisis. The current water reservoirs cannot satisfy the complete water demands of all the people the world. A large portion of them are bound to suffer from water scarcity. According to statistics, around one third of the world’s population suffers from water scarcity at present. And that’s not all. Because of over consumption the water reservoirs are losing more water than they gain. So the situation will become even more difficult in the future.
We are bound to look for alternative sources of water that can satisfy our rising water requirements. Rainwater is one of the best alternatives so far. If you have a plot of 2400 sq ft and your region receives an annual rainfall of about 1000 millimetre then you can collect about 230,000 litres of rainwater every year. It’s enough water to fully satisfy all the annual water needs of four people. And this isn’t merely a hypothesis. A man named AR Shivakumar from Bangalore has made this achievement. His house in Bengaluru has been water independent for the last 20 years.
Rainwater harvesting isn’t something that requires a lot of capital. Your house receives rainwater every year and it releases it. All you have to do is to devise a way to trap that water. Here are a few easy and effective methods that will help you in doing so:
- Surface Water Connecting Channel
This is the first and the most basic requirement. Most of the modern houses have it. It consists of a rain gutter and a drainage pipe connected to it. It helps in collecting in one place all the rainwater that the roof of a house receives. If you don’t have it then your roof will scatter away the rainwater and it would become impossible to collect it.
- Recharging Borewells and Tubewells
The borewells and tubewells generally get recharged by the underground water. But you can also use your collected water to recharge them. Just connect the rain drainage pipe to a filter that leads to the borewell. It will not only help you it will also help the people around you. The water collected by the borewells seeps through perforations of its walls and it replenishes the ground water. And that ground water is ultimately used by everyone around you.
- Rain Barrel
Rain Barrel provides you with the easiest way of collecting rain water. You just have to buy a Rain Barrel and connect it to the outlet of your rain drainage pipe and that’s all. A Rain Barrel doesn’t have many specifications. You can make one yourself by using any spare barrel that you have. But make sure that you cover the barrel properly so that it doesn’t become a breeding ground for mosquitoes or other insects.
- A Rainwater Storage Tank in Basement
If your house has a basement and if you want to take rainwater harvesting seriously then this product is for you. You can easily buy a rainwater storage tank that has an overall storage capacity of about 7000 litres. This tank will last for many years and it will serve as a major water source to you during the periods of dire necessity.
Earthwork is the easiest and the most cost effective way of collecting rain water. All you have to do is to choose a low lying ground which receives a lot of surface run off. After that you should dig trenches in that region and build earth walls to direct the flow of the water. The trenches will automatically collect the rain water and you’ll be able to use the water thus collected for the purpose of harvesting. You can even grow some plants around the trench and make a beautiful rain garden.
Sooner or later we are doomed to face water crisis. And as recourse for survival we will be bound to use alternative water sources. So if we switch to them now then it’ll be a very wise decision on our side and it will save us from future sufferings.