Roof-top rainwater harvesting only remedy for sinking water table
Voice of The Reader

Roof-top rainwater harvesting only remedy for sinking water table

February 4, 2018

Sir,

It was shocking to read the news item titled “Water Table Sinking” in SOM dated Feb.2. The water table is the upper surface of the zone of saturation. The zone of saturation is where the pores and fractures of the ground are saturated with water.

Groundwater depletion most commonly occurs because of the frequent pumping of water from the ground to fulfil the increasing demands of ever-increasing population, for all the facilities such as houses, shops, roads, offices, pavements, etc. This, in turn, decreases the open area for seepage of water into the ground.

Most of the stages of manufacturing processes in industries require water. If the number of industries increases, then the water requirement will also automatically increase. Therefore, increase of industries contributes to the depletion of water table.

India is an agricultural country and the water for agriculture is mainly utilised from ground water, rain water and canal water. As there is no rainfall in many places, agriculture cannot be entirely dependent on rain water which is erratic sometimes. Also, canal water is available in a few places only. Therefore, groundwater is the main source of water for agricultural activities and this causes depletion of  water table.

The one and only remedy is roof-top rainwater harvesting where water is captured from the roof catchments and stored in reservoirs. Harvested rainwater can be stored in sub-surface ground water reservoir by adopting artificial recharge techniques to meet the household/industrial needs through storage in tanks.

The main objective of rooftop as well as direct rainwater harvesting is to make water available for our future use. Capturing and storing of rainwater in other open spaces like fields, parks etc. for use is also important. Groundwater table comes up when all these factors are combined together. People should understand the above simple matters and join hands together at the time of water crisis.

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When anybody takes a stroll early in the morning one is very much pained to see how much treated and potable water is wasted and need not have to be further elaborated, which could have been saved and served the water purpose of days together. To avoid sinking of groundwater table, further sinking of borewells should be controlled (if   not avoided).

– Dr. M. Shyam Prasad, Krishnamurthypuram, 3.2.2018

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ONE COMMENT ON THIS POST To “Roof-top rainwater harvesting only remedy for sinking water table”

  1. Sir, Very interesting and informative letter.

    Every rainy many areas in the city get flooded due to lack of drainage system. If we have a proper drainage system we can recycle the drained water after removing harmful contaminants and use it to replenish the water table.

    It is a little known fact that in London,UK, they recycle the sewage water, after purification, to supply drinking water!

    As stated in the letter, the depletion of water table is due to the reduction in catchment areas.

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