Print Email Facebook Twitter The impact of conjunctive use of canal and tube well water in Lagar irrigated area, Pakistan Title The impact of conjunctive use of canal and tube well water in Lagar irrigated area, Pakistan Author Kazmi, S.I.H.S. Ertsen, M.W. Asi, M.R. Faculty Civil Engineering and Geosciences Department Water Management Date 2012-01-01 Abstract Introduction of the large gravity irrigation system in the Indus Basin in the late nineteenth century without a drainage system resulted in a rising water table, which resulted in water logging and salinity problems over large areas. In order to cope with the salinity and water logging problem, the Pakistan government initiated installation of 10,000 tube wells in different areas. This not only resulted in the lowering of water table, but also supplemented irrigation. Resulting benefits from the irrigation opportunities motivated framers to install private tube wells. The Punjab area meets 40% of its irrigation needs from groundwater abstraction. Today, farmers apply both surface water flows and groundwater from tube wells, creating a pattern of private and public water control. Sustainable use of groundwater needs proper quantification of the resource and information on processes involved in its recharge and discharge. The field work in the Lagar irrigated area, discussed in this paper, show that within the general picture of conjunctive use of canal water and groundwater, there is a clear spatial pattern between upstream and downstream areas, with upstream areas depending much less on groundwater than downstream areas. The irrigation context in the study area proves to be highly complex, with water users having differential access to canal and tube well water, resulting in different responses of farmers with their irrigation strategies, which in turn affect the salinity and water balances on the fields. To reference this document use: http://resolver.tudelft.nl/uuid:bccfc1ff-eb94-45ae-9f36-e80860599780 DOI https://doi.org/10.1016/j.pce.2012.01.001 Publisher Elsevier Access restriction Campus only ISSN 1474-7065 Source Physics and Chemistry of the Earth, 47-48, 2012; authors version Part of collection Institutional Repository Document type journal article Rights (c) 2012 Elsevier Files PDF 281603.pdf 914.12 KB Close viewer /islandora/object/uuid:bccfc1ff-eb94-45ae-9f36-e80860599780/datastream/OBJ/view