Rain water harvesting and storage solutions

Rainwater harvesting is the process of storing the accumulated water from surfaces and facility structures built for the purpose of collecting them in one single place like - a tank, reservoir, tower, bund, underground well, terrace pipes, roof tubs etc. This is the collection aspect of the process. Since the rainwater has superior quality and is a socially accepted form of water resource management, the collected water is then used for various purposes which harvests its quality benefits. Irrigation, Potable and nonportable water usage, tanker storage water needs can be fulfilled easily with Rainwater harvesting.


The way the storage design works for rainwater systems depends entirely at one's own call. Little or less consideration is needed unless if really required and specified to measure feasibility of the factors involved in the matter of designing the storage facilities and systems. can be implemented without much thought or they can employ feasibility studies that take into account many different factors for the site.

Mostly, the design is just meant to be of standard quality and durability for the water to be stored for mostly non potable uses. As with potable extraction, the use of storage is in fact a mediatory in place of further treatment of the water at the likely instance of external particles present in the rain water.

Some of the points to keep in mind while deciding to install a rainwater harvesting barrel of any other such system in your area:

  • Annual Rainfall Count and Availability Pattern
  • General Space for Collection in Urban vis a vis Rural area
  • Storage Volume Levels
  • Water Demand and Scarcity
  • Miscellaneous, Other information

Taking these points into account consideration will allow one to precisely place and affirm design integrity on the process of rainwater harvesting. This will in turn bring in better and more efficient ways to craft the best rainwater harvesting system that will be effective for accomplishing one’s goal on water sustainability.

India is the 2nd largest populous in the world, but it only holds about 4% of the natural resources. We need to inculcate more rainwater harvesting systems into our full proof policies to ensure we utilize and make this a regular sight at all major cities and towns of India.

Here are 5 Different Types of Rainwater Harvesting Storage Solutions:

1. Water Containers

The most common type of storage method for harvesting rainwater is the use of a water Butt or a Barrel to collect rainwater. It's a simple yet manageable way of storing water coming in through ducts, pipes and water meant for drain connections. So instead of water gutter outflow, there is an inward flow of water and as a result it saves that water from getting wasted. The stored water is then used for domestic uses like gardening, washing, and cleaning.

2. Direct-Pump Tanks

The stored water is underground and needs to be forced into the devices which allow for the usage of the said water. It can be a Submersible solution. This is when the water is pumped directly to the ducts and pipage of the house for domestic purposes. It only requires a pump set up next to the appliances which is the easiest of all installations.

There is also a Suction based solution wherein the pump is installed in the utility room or the control unit at the house. The difference is that suction pumps have limitations because they are connected to many systems which involve the mains water flow to all other utilities. Submersible pumps are faster in that case.

3. Indirect Pump Tanks

These types of storage tanks have an indirect pump which boosts water with the help of a booster pump; furthermore, providing for convenience and easy access of the stored water. One can adjust the flow and pressure of the water being transferred which is beneficial as opposed to gravity centered direct pump storages.

4. Reservoirs and Ponds

Such storage solutions are generally seen in rural areas where municipality associations find it easier to source water through such systems rather than tanks or pump storage facilities. Availability and space are rather abundant and conducive for ponds, lakes and reservoirs to harness the water through rainfall. The runoff water is stored in these natural or sometimes makeshift storage ponds which clock in maximum water retention. These places of storage normally have a bare soil end, but in some cases, the pond may have a concrete bottom.

5. Under-Ground Storage Solution

Underground storage tanks are extremely popular in water logging and built-up areas of high receiving rainfall for a particular rainy or monsoon season. These underground tanks have insulation protection with little to no exit pores for water to evaporate. Moreover, for cold regions like the north, the water stored in underwater ground tanks does not freeze if it is located below the frost line, this is a crucial benefit acquired from such solutions in areas where water turns ice and hence not feasible for immediate use. Underground storage tanks make this possible even in cold chilly terrains. They however need electrical pumps to pull in the stored water for use.