Question

Environmental impact of indira gandhi canal in rajasthan

Answer 1

1. After the construction of the Indira Gandhi Canal, irrigation facilities were available over an area of 6,770 km2 in Jaisalmer district and 37 km2 in Barmer district.
2. The canal has transformed the barren deserts of this district into fertile and good fields.
3. Crops of mustard, cotton, and wheat now grow in this semi-arid north-western region replacing the soil there previously.
4. Besides providing water for agriculture, the canal will supply drinking water to hundreds of people in far-flung areas.
5. There is a planting programme for greening the desert in areas near the Indira Gandhi Canal which was started in 1965. This consists of the planting of shelter belts along roads and canals, blocks of plantations and sand dune stabilization.

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Answer 2

In Rawatsar tehsil of Hanumangarh district, seepage from the Indira Gandhi canal system, excessive use of water in cultivated fields and accumulation of water in depressions have brought more than perceptible change in the environment through sub-soil water level rise, waterlogging and soil salinity. The field data and spectral characteristics of IRS-IB LISS II FCCs reveal that nearly 165 sq. km (34.25%) of the total command area is under waterlogging and soil salinity. The problems of the affected area have been categorised as slight (67.95 sq. km), moderate (3.37 sq. km), severe (93.67 sq. km) and very severe (36.76 sq. km). The areal extent of waterlogging and soil salinity is increasing every year. However, there is scope to arrest these problems using improved technologies of land and water resources management.