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Q: There are numerous benefits of irrigation like increase in food production, development of the area and social upliftment of the people. One of the harmful effects of irrigation is _____________.
  • A. Control of floods
  • B. mosquito breading and incidence of malaria
  • C. protection from famine
  • D. ruralisation
Correct Answer: Option B - Ill-effects of Irrigation– Due to excess application of water, seepage and leakage from canal, marshy land may be formed leading to breeding place of mosquitoes. • In unlined irrigation canal, excessive seepage of water through bed and sides takes places which raises the water table of the surrounding areas. Soil in the root zone of the crop is saturated and becomes alkaline which is harmful to the crops and plants. Thus the nearby area may be waterlogged • Temperature of the command area of an irrigation projects may be lowered and damp climate, prevails, which adversely affect the health of the community living in this area.
B. Ill-effects of Irrigation– Due to excess application of water, seepage and leakage from canal, marshy land may be formed leading to breeding place of mosquitoes. • In unlined irrigation canal, excessive seepage of water through bed and sides takes places which raises the water table of the surrounding areas. Soil in the root zone of the crop is saturated and becomes alkaline which is harmful to the crops and plants. Thus the nearby area may be waterlogged • Temperature of the command area of an irrigation projects may be lowered and damp climate, prevails, which adversely affect the health of the community living in this area.

Explanations:

Ill-effects of Irrigation– Due to excess application of water, seepage and leakage from canal, marshy land may be formed leading to breeding place of mosquitoes. • In unlined irrigation canal, excessive seepage of water through bed and sides takes places which raises the water table of the surrounding areas. Soil in the root zone of the crop is saturated and becomes alkaline which is harmful to the crops and plants. Thus the nearby area may be waterlogged • Temperature of the command area of an irrigation projects may be lowered and damp climate, prevails, which adversely affect the health of the community living in this area.