What are the problems faced by using groundwater for agriculture??
Answers
Explanation:
Overexploitation of groundwater and intensive irrigation in major canal commands has posed serious problems for groundwater managers in India.
Depletion of water tables, saltwater encroachment, drying of aquifers, groundwater pollution, water logging and salinity, etc. are major consequences of overexploitation and intensive irrigation.
It has been reported that in many parts of the country the water table is declining at the rate of 1-2 m/year. At the same time in some canal commands, the water table rise is as high as 1 m/year.
Deterioration in groundwater quality by various causes is another serious issue. Increased arsenic content in shallow aquifers of West Bengal reported recently has created panic among the groundwater users. Summed together, all these issues are expected to reduce the fresh water availability for irrigation, domestic and industrial uses. If this trend continues unchecked, India is going to face a major water crisis in the near future.
Realizing this, the Government of India has initiated several protective and legislative measures to overcome the groundwater management-related problems but, due to the lack of awareness and political and administrative will, none of the measures has made any significant impact. This paper highlights the critical issues and examines the various schemes related to groundwater development and management....
Intensive use of groundwater for irrigation leads to the lowering of water tables, reducing its potential for future use. It also generates multiple negative externalities, including salinity, stream depletion, or land subsidence that directly affect agricultural productivity, water users and the environment.