Tips on Harvesting Rainwater

  | 3 min read
Rainwater Harvesting

One of the resources that human beings cannot manufacture is water but somehow something that most of us take for granted. We are very aware of its usefulness to our survival and its limited supply. Harvesting of rainwater simply involves the combination of water from the areas on which rain falls and in the end storing this water for later use. This is particularly useful if you live in a place where water cutoffs are frequent, or you simply might want to take a break from your monthly DAWASCO bills during the rainy season.

Why is Rainwater Harvesting Important?

Rainwater is an inexpensive sustainable source of water that can be easily setup in your home. Harvesting rainwater can provide you with almost half of your family’s water needs. This does not only save water but is cheap and reduces our impact on the environment. You can also improve your gardening by using rainwater for irrigation because stored rainwater is usually free from pollutants as well as salts, minerals, and other natural and manmade pollution.

Here are different ways of harvesting rainwater you could try at home.

Install a Rain Barrel

 Rainwater Harvesting

The rain barrel water harvesting system is quite easy. You can easily make your own rain barrel from a large trash can or an old drum. Link it to a pipe fitted to collect rainwater from your rooftop, and you’re set.

Dry System

 Rainwater Harvesting

It may seem weird to talk about a ‘dry’ system when discussing water capture, but this method is quite popular. It is called ‘dry’ system to differentiate it from the ‘wet’ system explained below. This method is an adaptation of the rain barrel system, but it involves a larger storage volume. Essentially the collection pipe “drys” after each rain occurs since it empties straight inside the top of the tank. The storage tank must be located next to your house.


The Wet System

 Rainwater Harvesting

This system involves placing the collection of pipes underground in order to connect multiple downpipes from various gutters. The rainwater will fill the underground pipe and the water will rise to the vertical pipes until it flows into the tank. The downpipes and underground collection piping must have water-tight contact. The position of the tank inlet must be below the lowest gutter in the house.


How Do I Create A Complete Rainwater Collection System?

 Rainwater Harvesting

The image below illustrates a complete rainwater collection system. While some of the components shown are absolutely necessary, not all of the components listed are required. Although, all of these components will help create a harvesting system that is highly functional and nearly maintenance-free.


Rainwater is a relatively clean and absolutely free source of water, let’s take advantage of it whenever we can.

Elizabeth Nyimbo