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1 Shortt, R.; Boelee, E.; Matsuno, Y.; Faubert, G.; Madramootoo, C.; van der Hoek, W. 2003. Evaluation of thermotolerant coliforms and salinity in the four available water sources of an irrigated region of Southern Sri Lanka. Irrigation and Drainage, 52:133-146.
Domestic water ; Irrigation water ; Water quality ; Wells ; Water pollution ; Seepage ; Salinity ; Tube wells ; Filtration ; Statistical analysis ; Water scarcity / Sri Lanka / Uda Walawe Irrigation System
(Location: IWMI-HQ Call no: IWMI 631.7.5 G744 SHO, PER Record No: H031435)
In many developing countries a close linkage exists between drinking and irrigation water; however, the effects of irrigation management on drinking water availability and quality, and what drinking water supplies are best suited to irrigated areas, have been little studied. Bacterial contamination and salinity of drinking water sources in a community within the Uda Walawe irrigation system of southern Sri Lanka were monitored from August to December 2000. Water with the lowest combination of faecal contamination and salt content (highest quality) was found in shallow wells, recharged with seepage water from the irrigation system. Of these wells, those surrounded by a protective wall had the lowest levels of thermotolerant coliforms (median of 244 ThCU 100 ml-1) as compared to shallow wells without protective walls (549 ThCU 100 ml-1). Furthermore, tube well waters were highly saline (average of 0.67 mS cm-1), while canal and reservoir waters had high thermotolerant coliform levels (3940 and 950 ThCU 100 ml-1). Interseasonal canal closures eliminate the canals as a water source, lowering water levels in shallow wells, and thus reducing regional water availability. Concrete lining of canals may exacerbate the drying up of shallow wells during canal closure, therefore eliminating the primary source of water in the region that can be used for drinking after only simple treatment.
2 Floch, P. 2005. Water user associations as means of preventing and dealing with conflict: A perspective on irrigation-induced conflicts. M.Sc. Thesis submitted to the University of Natural Resources and Applied Life Sciences, Vienna, in partial fulfillment of the requirements for the degree of ‘Diplomingenieur’ ix, 103p.
Water user associations ; Farmers’ associations ; Conflict ; Irrigation programs ; Irrigation canals ; Organizations ; Water requirements ; Water demand ; Water delivery ; Water availability ; Domestic water / Sri Lanka / Walawe River Basin / Uda Walawe Irrigation System / Manamperigama Branch Canal / Kachchigala Subsystem
(Location: IWMI-HQ Call no: D 631.7.3 G744 FLO Record No: H036912)
3 Boelee, Eline; van der Hoek, Wim. 2005. Groundwater levels related to irrigation water management in Suriyawewa. [Abstract only]. In Sri Lanka Association for the Advancement of Science (SLAAS), Proceedings of the 57th Annual Session, Part 1 - Abstracts, 26 November – 1 December 2001. pp.132 (C131)
Irrigation management ; Groundwater ; Seepage ; Rehabilitation ; Irrigation canals ; Wells / Sri Lanka / Suriyawewa / Uda Walawe Irrigation System
(Location: IWMI-HQ Call no: IWMI 631.7.6.3 G744 BOE Record No: H038161)
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