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Impact of scavenger wells on crops and groundwater table




Kumbhar, Rasheed Ahmed, author
Ansari, Abdul Khalique, author
U.S. Committee on Irrigation and Drainage, publisher

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Scavenger well extracts fresh and saline water through dual pumping, resulting in lowering the water table and maintaining the equilibrium between both aquifers. This study was undertaken to analyze the impact of scavenger wells on extent of water table control, cropping pattern, crop yield and land utilization in Irrigation subdivision Khadro Sanghar Sindh, Pakistan. The results show that the water table has decreased at least 132 cm below the surface in most of the study area. Field survey results show that crop yield has increased 50% for cotton. Abandoned land has dropped from 78% to 28% of Culture able Command Area (CCA), which are under trenches, uneven topography and saline drains. As a result the land value has increased by six to ten times at many places.


Presented at the 2002 USCID/EWRI conference, Energy, climate, environment and water - issues and opportunities for irrigation and drainage on July 9-12 in San Luis Obispo, California.

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