Root Zone Salinity Management Using Fractional Skimming Wells with Pressurized Irrigation: Inception Report

IWMI, 2001 - 37 Seiten
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In the short water supply environment of Pakistan, farmers try to minimize the gap between demand and supply of canal water extracting groundwater for irrigation purposes. However, saline groundwater upconing may occur in response to fresh groundwater withdrawals from unconfined aquifer underlain by salty groundwater. Skimming well technology can help in controlling this upconing phenomenon. However, in most cases, the small discharges of such wells cannot be efficiently applied on surface irrigated croplands. Pressurized irrigation application systems use small discharge effectively, but the cost and availability of equipment in the local market is a significant constraint. Root zone salinity is also expected to increase if this skimmed groundwater is used for irrigation purposes, particularly in the absence of proper salinity management practices. To address these issues, International Water Management Institute (IWMI), Water Resource Research Institute (WRRI) of National Agricultural Research Centre (NARC), and Mona Reclamation Experimental Project (MREP) of Water and Power Development Authority (WAPDA) are collaborating to undertake an applied research Project on Root Zone Salinity Management Using Fractional Skimming Wells with Pressurized Irrigation. This project is funded by the World Bank through WAPDA under the Research Sub-Component of the National Drainage Program (NDP). The duration of the project is three years March 1999-February 2002.

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