Question

how is rain water harvesting useful for urban areas?​

Answer 1

Answer:

Collected rainwater can supplement other water sources when they become scarce or are of low quality like brackish groundwater or polluted surface water in the rainy season. It also provides a good alternative and replacement in times of drought or when the water table drops and wells go dry.

Answer 2

Explanation:

Advantages

AdvantagesLocal people can easily be trained to build RWH systems themselves. This reduces costs and encourages more participation, ownership and sustainability at community level.

systems themselves. This reduces costs and encourages more participation, ownership and sustainability at community level.Rainwater is better than other available or traditional sources (groundwater may be unusable due to fluoride, salinity or arsenic).

systems themselves. This reduces costs and encourages more participation, ownership and sustainability at community level.Rainwater is better than other available or traditional sources (groundwater may be unusable due to fluoride, salinity or arsenic).Costs for buying water and time to extract from the city water supply can be saved.

systems themselves. This reduces costs and encourages more participation, ownership and sustainability at community level.Rainwater is better than other available or traditional sources (groundwater may be unusable due to fluoride, salinity or arsenic).Costs for buying water and time to extract from the city water supply can be saved.It provides water at the point of consumption.

systems themselves. This reduces costs and encourages more participation, ownership and sustainability at community level.Rainwater is better than other available or traditional sources (groundwater may be unusable due to fluoride, salinity or arsenic).Costs for buying water and time to extract from the city water supply can be saved.It provides water at the point of consumption.Not affected by local geology or topography.

systems themselves. This reduces costs and encourages more participation, ownership and sustainability at community level.Rainwater is better than other available or traditional sources (groundwater may be unusable due to fluoride, salinity or arsenic).Costs for buying water and time to extract from the city water supply can be saved.It provides water at the point of consumption.Not affected by local geology or topography.Almost all roofing material is acceptable for collecting water for household purposes.

systems themselves. This reduces costs and encourages more participation, ownership and sustainability at community level.Rainwater is better than other available or traditional sources (groundwater may be unusable due to fluoride, salinity or arsenic).Costs for buying water and time to extract from the city water supply can be saved.It provides water at the point of consumption.Not affected by local geology or topography.Almost all roofing material is acceptable for collecting water for household purposes.Rooftop RWH reduces the amount of rainwater going into sewers, drains and may reduce flooding and clogging of water channels and uptakes.

hope it helps you...