Rainwater harvesting system practised in West Bengal
Answers
RAINWATER HARVESTING IN WEST BENGAL Rapid urbanization and industrialization has led to incessant withdrawal ofgroundwater in recent times, without paying much heed to the hydro-geologicalcharacteristics of the area, thereby depleting the groundwater level at a fast rate. WestBengal receives a fair amount of rainfall in almost all parts during monsoon.However, in absence of any structured strategy for harvesting the rainwater exceptingsome piecemeal approaches Most part of the rainwater finds its way to drains/nullahsas runoff. In view of uncontrolled groundwater abstraction, there is not onlysignificant lowering of aquifer level, in many areas of the state including Kolkata,Haldia, etc., such abstraction is also resulting in intrusion of saline water as alsoarsenic in the aquifer, besides subsidence of land in specific areas.For reasons stated above, it is high time to start harvesting rainwater, specially inurban cities and drought-prone districts of the state. The rainwater during the rainyseasons can easily be collected from the rooftop (even in thatched huts). The collectedrainwater may either be recharged into the groundwater aquifers or storied for directuse after very simple pre-treatment.
✭✮ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ✮✭
┗─━─━─━─━∞◆∞━─━─━─━─┛
Rainwater Harvesting➫ The technique used to store rainwater by making water harvesting structure to recharge the underground water resource.
♦ It is one of the methods that can be used for water conservation.
♦ It can be a paved area like the terrace or courtyard of a building.
♦ If we are to have a sustainable future, then rainwater harvesting is going to have to become an important part of our life.
♦ The catchment of a water Harvesting system is the surface which directly receives the rainfall and provides water to the system.
➧ Types of rainwater harvesting system are:-
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=⤵
❱ Direct Pumped
❱ Indirect Pumped
❱ Indirect Gravity
➧ It comprises components of various stages:-
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=⤵
❱ Transporting Rainwater through pipes or drains.
❱ Filtration.
❱ storage in tanks for reuse or recharge.
➧ How is the Rainwater Harvesting Done:-
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=⤵
❱ By taking rooftop rainwater directly into the ground by drain pipes, dug well or Sunk for water pump.
❱ By taking rain water directly into pond & tanks.
❱ By making percolation tanks, well, deep pits or trenches in the path of rainwater.
➧ Advantages of Rainwater Harvesting are:-
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=⤵
❱ It reduces run of loss of rainwater.
❱ It maintains supply of water during dry month.
❱ It recharges underground water.
❱ It checks soil erosion.
_________
Thanks...✊