Study the given diagram and answer the questions that follow:
(18.1) Which sectors accounts for most of the groundwater utilisation? Give one reason.
(18.2) Why is the share of water utilisation in domestic sector lower in groundwater as compared to surface water?
(18.1) Agriculture sectors accounts for most of the groundwater utilisation.
In agriculture, water is mainly used for irrigation. Irrigation is needed because of spatio-temporal variability in rainfall in the country. The large tracts of the country are deficient in rainfall and are drought prone.
(18.2) However, due to topographical, hydrological and other constraints, only about 690 cubic km (32 per cent) of the available surface water can be utilised.
Analyse the economic and social values of rainwater harvesting.
The economic and social values of rainwater harvesting:
(i) It is a low cost and eco-friendly technique for preserving every drop of water by guiding the rain water to bore well, pits and wells.
(ii) Rainwater harvesting increases water availability and checks the declining ground water table.
(iii) Improves the quality of groundwater through dilution of contaminants like fluoride and nitrates.
Mention any two sources of water pollutants created by humans.
Sources of water pollutants created by humans :
(ii)Toxic effluents from industries
“ ‘Erratic monsoon’ and ‘Indebtedness’ are the major problems of Indian agriculture.” Suggest and explain the measures to overcome these problems.
Suggestions for solving the problem of Erratic Monsoon:
(i) Expansion of irrigation facilities.
(ii) Efficient use of water for irrigation.
(iii) Improvement in the methods of irrigation e.g. use of drip irrigation & sprinklers.
(iv) Rainwater harvesting
(v) Maintenance of existing lakes, ponds, tanks etc.
(vi) Any other relevant point
Suggestions for Solving the problem of Rural Indebtedness:
(i) Minimum support price
(ii) Provision of subsidies (seeds, fertilisers etc.)
(iii) Storage facilities
(iv) Provision of loan at low-interest rates
“Scarcity of water on account of its increased demand, possess possibility the greatest demand in India.” Analyse the statement.