Drainable surplus assessment in irrigated agriculture: field application of the groundwater approach
- 39 Downloads
To assess the drainable surplus of an irrigated area, a methodologybased on a groundwater-balance approach was developed and appliedin Schedule I-B of the Fourth Drainage Project near Faisalabad inPakistan. To determine the seasonal net recharge in this area, anumerical groundwater model was run in inverse mode. The data inputfor the model consisted of the geometry of the aquifer system, theaquifer parameters, and historical watertable elevations. The seasonalnet recharge values, calculated from the individual recharge anddischarge components, were “tuned” with the results of the inversemodelling. The advantage of such an integrated approach is that allthese components are linked. The design net recharge was estimatedfrom the historical net recharge of the wettest monsoon in the studyperiod. Its rainfall recharge values were then substituted for those of adesign monsoon. In this substitution procedure, the rainfall rechargemethodology and parameters were adopted from the tuning procedure.From this design net recharge, estimates could be made of the requireddrainable surplus, with and without drainage simulation.
KeywordsAquifer System Field Application Integrate Approach Irrigate Area Irrigate Agriculture
Unable to display preview. Download preview PDF.
- Boonstra J. & de Ridder N.A. 1990. NumericalModelling of Groundwater Basins, 2nd edition. ILRI Publication 29, Wageningen, The Netherlands, 226 pp.Google Scholar
- Boonstra J., Moghal M.A. Syed Hamid Ali & Vlotman W.F. 1991. Collection, Processing and Screening of Data for the S-I-B Area of the Fourth Drainage Project. NRAP Report 30, Lahore, Pakistan, Dec. 1991, 104 pp.Google Scholar
- Boonstra J., Rizvi Sultan A., Moghal M.A., Ilyas M. & Bhutta M.N. 1994. Assessment of Drainable Surplus for the S-I-B Area of the Fourth Drainage Project. IWASRI Publication 142, Lahore, Pakistan, Aug. 1994, 159 pp.Google Scholar
- Boonstra J. & Bhutta M.N. 1996. Groundwater recharge in irrigated agriculture: the theory and practice of inverse modelling. J. Hydrol. 174: 357–374.Google Scholar
- Drury 1969. Drainable Surplus Problems in Irrigated Areas, Pakistan Engineering Congress, Lahore. Symposium on Water Resources Development, Proceedings, Vol. 11, Paper No. 91, pp. 41–56.Google Scholar
- Maasland M., Priest J.E. & Malik M.S. 1963. Development of Groundwater in the Indus Plains. Pakistan Engineering Congress, Lahore. Symposium on Waterlogging and Salinity, Proceedings, Vol. 7, Paper 56, pp. 123–161.Google Scholar
- Moghal M.A., Syed Hamid Ali & Boonstra J. 1992. Seasonal Net Recharge to the Aquifer Underlying the Schedule I-B Area, June 85–June 90, Fourth Drainage Project. NRAP Report 33, Lahore, Pakistan, Mar. 1992, 127 pp.Google Scholar
- Rizvi Sultan A. 1993. Prediction of Drainable Surplus for Fourth Drainage Project Faisalabad. A thesis for the degree of Master of Philosophy in Water Resources Management. CEWRE, University of Eng. & Technology, Lahore, 127 pp.Google Scholar
- USBR. 1989. Design Memorandum Subsurface Drainage Fourth Drainage Project (LRRP), Faisalabad, Pakistan. Prepared by the United States Department of the Interior, Bureau of Reclamation, Denver, Colorado, USA.Google Scholar
- WAPDA. 1978. Project Report Upper Rechna Remaining (SCARP-IV). Project Planning Organization (N.Z). December, 1978. 27-E/I, Gulberg III, Lahore, Pakistan. pp. 31–37.Google Scholar
- WAPDA. 1984. PC-I Proforma Command Area Development Project Drainage Component Chashma Right Bank Canal Stage-I, May 1984, pp. 55–76.Google Scholar