Your search found 7 records
1 O'Mara, G. T.. 1984. Issues in the efficient use of surface and groundwater in irrigation. Washington, DC, USA: World Bank. [20], 93 p. (World Bank staff working paper no. 707)
(Location: IWMI-India Call no: 631.7.6.3 G000 OMA Record No: H0493)
The efficient use of water resources where groundwater and surface water are used conjunctively may require special policies to rationalize the interaction among pumping by farmers, canal diversions by irrigation system managers, and the physical response of the stream aquifer system. The problem is acute in the great alluvial basins of Asia--the Indus, Gangetic, and North China plains--where surface water irrigation has long been practiced and modern tubewell technology has been diffused extensively in recent decades. These alluvial basins account for a large proportion of total irrigated land in developing countries and the countries involved account for about half of the world's population. Significant gains in output are possible from more efficient conjunctive use in such regions (for example, an increase of 20% is estimated for Pakistan). However, these potential gains are not costless because their realization requires changes in irrigation institutions, methods of irrigation management, and often accompanying investments in drainage facilities. Three broad approaches to the problem of efficient resource use under externalities (that is, physical interdependence among individual producers) have been defined by economists: (1) assignment of well- defined, transferrable property rights; (2) imposition of corrective taxes or subsidies; and (3) centralized control over the entire resource. The feasibility and institutional implications of these approaches are discussed and several case histories of actual policy responses to the social costs incurred by inefficient conjunctive use are reviewed. The use of more sophisticated analytical methods in coping with the difficult informational and managerial requirements of efficient conjunctive use will require much better information systems, more skilled and responsive irrigation managers, and institutional reform that involves water-using farmers more actively.
2 Cheung, A.; O'Mara, G. T.. 1980. A review of the irrigation evaluation survey of the Water Planning Division of the Water and Power Development Authority of Pakistan. Washington, DC, USA: World Bank. Development Resources Center. 39p.
(Location: IWMI-HQ Call no: P 884 Record No: H0596)
3 Duloy, J. H.; O'Mara, G. T.. 1984. Issues in efficiency and interdependence in water resources investments: Lessons from the Indus Basin of Pakistan. Washington, DC, USA: World Bank. xi, 129 p. (World Bank staff working paper no. 665)
Investment planning ; Water resources development ; Irrigation ; Investment policy ; Mathematical models / Pakistan / Indus River
(Location: IWMI-India Call no: 631.7.4 G730 DUL Record No: H0590)
The paper examines alternative policies for achieving more efficient resource utilization in the Indus Basin. Using a simulation model which links the hydrology of a conjunctive stream aquifer system to an economic model of agricultural production for each of 53 regions of the basin together with a network model of the flows in river reaches, link canals and irrigation canals throughout the basin, the authors have studied the joint effect of various canal water allocation and associated private tubewell pumping control policies on overall system efficiency. The results suggest that large gains in agricultural production are possible given more efficient policies. However, there are significant adjustment costs in the form of large required drainage investments. The model was then adapted to assess sequentially a proposed investment program of the Water and Power Development Authority of Pakistan. The program components were aggregated into homogenous sets and evaluated. The report concludes with a discussion of the results of this exercise.
4 Bisschop, J.; Candler, W.; Duloy, J. H.; O'Mara, G. T.. 1982. The Indus basin model: A special application of two-level linear programming. Mathematical Programming Study, 20:30-38. (World Bank reprint series no. 232)
(Location: IWMI-HQ Call no: P 4002 Record No: H01379)
5 Duloy, J. H.; O'Mara, G. T.. 1982. Lessons from the Indus basin study. [4], 135p.
Income distribution ; Irrigated farming ; Irrigation management ; Farm income ; Agricultural production ; Investment / Pakistan
(Location: IWMI-HQ Call no: P 811 Record No: H01311)
6 O'Mara, G. T.. 1989. Efficiency in irrigation: The conjunctive use of surface and groundwater resources. Washington, DC, USA: World Bank. xi, 196p.
Irrigation efficiency ; Water resources ; Groundwater ; Surface water ; Conjunctive use ; Economic aspects ; Case studies
(Location: IWMI-HQ Call no: 631.7.6.3 G000 OMA Record No: H06018)
7 O'Mara, G. T.; Duloy, J. H. 1989. Modeling efficient conjunctive use of water in the Indus Basin. In O'Mara, G. (Ed.) Efficiency in irrigation: The conjunctive use of surface and groundwater resources. Washington DC, USA: World Bank. pp.128-138.
(Location: IWMI-HQ Call no: 631.7.6.3 G000 OMA Record No: H06029)
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