Land based rainwater harvesting occurs when runoff from land surfaces is collected in furrow dikes ponds tanks and reservoirs.
Roof based rainwater harvesting.
From rainwater the practice of collecting rainwater can be classified into two categories such as.
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Rainwater harvesting rwh is the collection and storage of rain rather than allowing it to run off.
Land based roof based.
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.
As your roof surface is the catchment area for harvesting rainwater it s important to know how large or small it is so you can calculate how much rainwater you can expect to harvest.
Harvested rain water can be stored in subsurface ground water reservoir by adopting artificial recharge techniques to meet the household needs through storage in tanks.
The main objective of rooftop rain water.
Rooftop rain water harvesting is the technique through which rain water is captured from the roof catchments and stored in reservoirs.
Rainwater harvesting is an excellent means of supplementing water for use on site if the process is permitted by state and or local laws.
Dew and fog can also be collected with nets or other tools.
The image below shows how differences in roof slope do not change this building s catchment area.
The practice of collecting rainwater from rainfall events can be classified into two broad categories.
Calculating your roof surface area building plans offer the easiest way to calculate your roof surface area after all the numbers should all be on there.
Using rainwater where appropriate conserves potable.
To calculate how much rainwater that you can harvesting use the equation below.
Use this rainwater harvesting calculator to find the answer.