In the short water supply environment of Pakistan, fanners try to minimize the gap between demand and supply of canal water by 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 control1ing this upconing phenomenon. However, in most cases, the small discharges of such wells cannot be efficiently applied on surface irrigated croplands. Pressurized irrigation systems use smal1 discharge effectively, but the cost and availability of equipment in the local market are the constraints. 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 (lWMI), Water Resource Research Institute (WRRI) and Mona Reclamation Experimental Project (MREP) collaborated to undertake an applied research project on Root Zone Salinity Management Using Fractional Skimming Wells with Pressurized Irrigation. This project was started in March 1999 and concluded in June 2003. The National Drainage Program (NDP), Research Component -WAPDA funded this projectWhen the reasons of cracks in the strainers were discussed, they were of the view that large pumping unit (high suction) ... (ii) the joints in strainers and blind pipes become loose as a result of water hammer, (iii) small cracks in PVC pipes which ... The non-functional strainers are repaired, replaced or plugged permanently.
|Title||:||Root zone salinity management using fractional skimming wells with pressurized Irrigation: proceedings of the Year-End Seminar 2001|
|Author||:||Muhammad Siddique Shafique, Muhammad Yasin, Muhammad Mehboob Alam|