Question

Collecting rainwater and storing it for later use is called rainwater harvesting. Which of the following statements are not true for the technique of rainwater harvesting?

(i) Rainwater is allowed to go down the roadside drains
(ii) Rainwater from rooftop is collected in storage tanks
(iii) The collected rainwater needs to be filtered as it contains soil
(iv) This practice reduces the amount of groundwater available to us

• A. (ii) and (iii) only
• B. (iii) and (iv) only
• C. (i) and (iv) only
• D. (i) and (ii) only

Answer 1

The correct option is B (iii) and (iv) only

$\bullet$ A lot of rainwater that could add to the groundwater gets wasted.
$\bullet$ Rainwater can be used to recharge groundwater through rainwater harvesting.
$\bullet$ Rooftop rainwater harvesting is a method of collecting and storing rainwater that falls on the roof of the houses in the storage tanks.
$\bullet$ Rainwater harvesting can also be done by diverting rainwater from roads or houses directly into the ground through drains.
$\bullet$ The rainwater can be collected by rooftop harvesting and also by allowing rainwater to go down the road drains.
$\bullet$ By collecting the rainwater into the underground storage tanks the availability of groundwater increases.
$\bullet$ As the rainwater is being collected there is no need to filter as it does not contain any soil.
$\bullet$ Therefore statement 3 and 4 are incorrect.