what is meant by rain water harvesting?

Answer 1

It probably means collecting or gathering rain water.

Collecting, if the experiment is asking for you to set the equipment out during or prior to a rainstorm, but gathering if it means "harvesting" after the rain has passed.

Hope this was a bit helpful.

Answer 2

HI!
Rain water harvesting is exactly what it means. It means that you help the rain water to seep into the ground so that the ground level of water increases.
I suppose there are many techniques but the most commonly used technique that I know of goes something like this:
1. Make drain pipes on all the roofs that will lead all the rain water to one place.
2. The place where the water is collected is first to be dug into a big pit.
3. Now fill the pit with sand, large stones and finally mud.
4. This enables the water to get deeper into the ground rather than simply flowing away.

Answer 3

Rainwater harvesting is the collection and storage of rain from roofs or from a surface catchment for future use. The water is generally stored in rainwater tanks or directed into mechanisms which recharge ground water. This is appropriate in many parts of the world, such as western Britain, China, Brazil, Thailand, Sri Lanka, Germany and India, where there is enough rain for collection and conventional water resources either do not exist or are at risk of being over-used to supply a large population. Rainwater harvesting can provide lifeline water for human consumption, reduce water bills and the need to build reservoirs which may require the use of valuable land.




*for more info, visit http://en.wikipedia.org/wiki/Rainwater_harvesting

Answer 4

Collecting rain water. Like the old-style rain barrels that used to dot the countryside at every downspout.

Answer 5

Exactly that. People save and filter rain water for many uses. It is naturally soft, the best thing for car batteries, aquariums, etc.

Answer 6

You collect rain water, rather than letting it wash away

Answer 7

that's collecting rain water to provide water for usage...normally it will be done by using a man made dam to fill up with rain water and then either use the water for energy (hydro dam) or by recycling it to be use for population.