Your search found 13 records
1 Nandalal, K. D. W.; Bogardi, J. J. 1993. Optimal management of stratified reservoirs. In Tingsanchali, T. (Ed.), Proceedings of the International Conference on Environmentally Sound Water Resources Utilization, Bangkok, Thailand, 8-11 November 1993. Vol.1. Bangkok, Thailand: AIT. pp.II-266-279.
(Location: IWMI-HQ Call no: 333.91 G000 TIN Record No: H015807)
2 Milutin, D.; Bogardi, J. J.; Nandalal, K. D. W.. 1995. An approach to long-term operational assessment of multiple-reservoir systems. In Oman. Ministry of Water Resources, The Sultanate of Oman International Conference on Water Resources Management in Arid Countries, Muscat, Oman, 12-16 March 1995. Volume 2: Nizwa/Bahla Sessions, display papers. Muscat, Oman: The Ministry. pp.707-710.
(Location: IWMI-HQ Call no: 333.91 G728 OMA Record No: H016747)
3 Nandalal, K. D. W.. 2000. The use of optimization techniques in planning and management of complex water resources systems. In Samad, M.; Wijesekera, N. T. S.; Birch, A. (Eds.). Status and future direction of water research in Sri Lanka: proceedings of the National Conference held at the BMICH, Colombo, Sri Lanka, 4-6 November, 1998. Colombo, Sri Lanka: International Water Management Institute (IWMI). pp.119-129.
Reservoir operation ; Optimization ; Planning ; Simulation models ; Design / Sri Lanka / Mahaweli Project / Bowatenna Reservoir / Moragahakanda Reservoir
(Location: IWMI HQ Call no: IWMI 333.91 G744 SAM Record No: H023491)
(0.53 MB)
4 Nandalal, K. D. W.; Ratnayake, U. R. 1998. Optimum water allocation in a diversion type irrigation scheme: Gampolawela Rajaela Diversion Scheme. Paper 10a of Session 24. In International Irrigation Management Institute (IIMI). National Water Conference on Status and Future Directions of Water Research in Sri Lanka, BMICH, Colombo, Sri Lanka, 4-6 November 1998. Session 22: Groundwater II; Session 23: Water management research needs; Session 24: Water allocation. Research papers presented. 8p.
Water allocation ; Optimization ; Models ; Irrigation programs ; Irrigation canals ; Flow control / Sri Lanka / Kandy / Ulapone / Gampolawela Rajaela Diversion Scheme
(Location: IWMI-HQ Call no: IWMI 333.91 G744 INT Record No: H023565)
(0.15 MB)
5 Nandalal, K. D. W. 2001. A study on the impact of water resources development works along Walawe River on lagoons in the basin. Unpublished report, funded by IWMI, and carried out at the University of Peradeniya, Department of Civil Engineering. iv, 15p.
River basins ; Water resources development ; Lagoons ; Water quality ; Salinity ; Drainage / Sri Lanka / Walawe River / Kalametiya Lagoon / Lunama Lagoon
(Location: IWMI-HQ Call no: IWMI 333.91 G744 NAN Record No: H031406)
6 Rajasekaram, V.; Simonovic, S. P.; Nandalal, K. D. W.. 2003. Computer support for implementation of a systemic approach to water conflict resolution. Water International, 28(4):454-466.
Water management ; Conflict ; Water allocation ; River basins ; Reservoir operation ; Models ; Flood control
(Location: IWMI-HQ Call no: PER Record No: H033535)
7 Nandalal, K. D. W.; Sakthivadivel, R. 2003. Availability, use and productivity of water in Walawe River Basin. Engineer, 36(3):30-38.
River basins ; Catchment areas ; Water availability ; Water use ; Productivity ; Water balance / Sri Lanka / Walawe River Basin
(Location: IWMI-HQ Call no: PER Record No: H033962)
(0.61 MB)
8 Nandalal, K. D. W.; Sakthivadivel, R. 2002. Planning and management of a complex water resource system: Case of Samanalawewa and Udawalawe Reservoirs in the Walawe River, Sri Lanka. Agricultural Water Management, 57(3):207-221.
Irrigation programs ; Reservoir operation ; Operating policies ; Optimization ; Simulation models ; Stochastic process ; Irrigation water ; Water demand / Sri Lanka / Walawe River / Samanalawewa / Udawalawe
(Location: IWMI-HQ Call no: PER, IWMI 631.7.1 G744 NAN Record No: H030768)
9 Rajasekaram, V.; Nandalal, K. D. W.. 2004. System dynamics-based decision model for water management in Walawe Basin, Sri Lanka. In Herath, S.; Pathirana, A.; Weerakoon, S. B. (Eds.). Proceedings of the International Conference on Sustainable Water Resources Management in the Changing Environment of the Monsoon Region. Bandaranaika Memorial International Conference Hall, Colombo, Sri Lanka, 17-19 November 2004. Vol.II. Colombo, Sri Lanka: National Water Resources Secretariat. pp.575-582.
River basin development ; Water management ; Decision support tools ; Models ; Irrigation programs ; Reservoir storage / Sri Lanka / Uda Walawe Irrigation Scheme / Kaltota Irrigation Scheme
(Location: IWMI-HQ Call no: 333.91 G000 HER Record No: H039546)
10 Nandalal, K. D. W.; Semasinghe, S. B. A. D. 2006. A system dynamics simulation model for the assessment of water resources in Sri Lanka. In Water, Engineering and Development Centre (WEDC). Sustainable development of water resources, water supply and environmental sanitation: 32nd WEDC International Conference, Bandaranaike Memorial International Conference Hall, Colombo, Sri Lanka, 13th - 17th November 2006. Preprints. Leicestershire, UK: Water, Engineering and Development Centre (WEDC) pp.243-246.
Water resources ; Water management ; Water availability ; Assessment ; Forecasting ; Simulation models ; Calibration / Sri Lanka
(Location: IWMI HQ Call no: 333.91 G000 WAT Record No: H041037)
11 Nandalal, K. D. W.; Simonovic, S. P. (Ed.) 2003. State-of-the-art report on systems analysis methods for resolution of conflicts in water resources management: a report prepared for Division of Water Sciences UNESCO. Paris, France: UNESCO, IHP; Paris, France: World Water Assessment Programme. 127p. (Technical Documents in Hydrology PCCP Series 4)
Water resource management ; Conflict ; Network analysis ; Systems analysis ; Decision support systems ; Simulation models ; Case studies
(Location: IWMI HQ Call no: e-copy only Record No: H043302)
(3.01 MB) (3.01 MB)
12 Seenithamby, M.; Nandalal, K. D. W.. 2021. Water resource development planning around village cascades: piloting of a scientific methodology in Yan Oya River Basin of Sri Lanka. Water Policy, 23(4):946-969. [doi: https://doi.org/10.2166/wp.2021.098]
Water resources development ; Planning ; Tanks ; River basins ; Villages ; Irrigation systems ; Water management ; Arid zones ; Water balance ; Water demand ; Water storage ; Groundwater ; Rainfall-runoff relationships ; Land use ; Land cover ; Hydrology ; Modelling / Sri Lanka / Anuradhapura / Yan Oya River Rasin
(Location: IWMI HQ Call no: e-copy only Record No: H050584)
https://iwaponline.com/wp/article-pdf/23/4/946/924926/023040946.pdf
https://vlibrary.iwmi.org/pdf/H050584.pdf
https://vlibrary.iwmi.org/pdf/H050584.pdf
(1.17 MB) (1.17 MB)
In the dry zone of Sri Lanka experiencing hydrological and weather extremes, non-availability of validated scientific data on stream-flows and groundwater stocks for sufficient time periods, and the presence of large numbers of small and large tanks that divert the water from the streams, make water resource planning a very complex challenge. An integrated modelling exercise was carried out: first using a hydrological simulation model to assess the annual and seasonal water flows of Yan Oya basin of Anuradhapura district and its seven sub-watersheds for 30 years and their dependability; then using a water balance model to analyze the extent to which the current water demands of five selected cascades are being met from the supplies available; and assessing the scope for augmenting the existing storage capacity of the tanks to reduce the irrigation deficits. This article presents the results of the study with regard to: the basin flows and their variability; and water balance scenarios for five selected cascades, with and without modifications in tank storage capacity. The article also discusses how the results from such integrated modelling studies should be used by irrigation planners for taking water management decisions for the basin with decentralized storages like tanks.
13 Madushanka, G. A. T.; Nandalal, K. D. W.; Muthuwatta, Lal P. 2022. Hydrological modelling for reservoir operation: application of SWAT model for Kalu Ganga Catchment, Sri Lanka. Engineer: Journal of the Institution of Engineers, Sri Lanka, 55(3):29-41. [doi: http://doi.org/10.4038/engineer.v55i3.7519]
Reservoir operation ; Hydrological modelling ; Catchment areas ; Rivers ; Water availability ; Stream flow ; Rain ; Land use ; Soil types ; Parameters / Sri Lanka / Mahaweli System / Kalu Ganga Catchment
(Location: IWMI HQ Call no: e-copy only Record No: H051558)
https://engineer.sljol.info/articles/10.4038/engineer.v55i3.7519/galley/6133/download/
https://vlibrary.iwmi.org/pdf/H051558.pdf
https://vlibrary.iwmi.org/pdf/H051558.pdf
(0.64 MB) (654 KB)
Kalu Ganga, a major tributary of Amban Ganga, is one of the perennial rivers of Sri Lanka. Also, Amban Ganga is a major tributary of Mahaweli Ganga. The Kalu Ganga starts from Knuckles mountains, and about 90% of the catchment is covered with forests. The Government of Sri Lanka constructed Kalu Ganga and Moragahakanda Reservoirs in 2014 to increase the water availability in Mahaweli Basin to improve the agricultural and drinking water benefits in several provinces. This study used the Soil Water Assessment Tool (SWAT) to simulate the hydrology of the Kalu Ganga catchment and estimate the daily streamflow series of the Kalu Ganga. The long-term mean annual flow of the Kalu Ganga at the dam site would be 196 MCM (equivalent to 6.24 m3/s) with a standard deviation of 57.5 MCM and coefficient of variation of 0.29. The mean annual catchment rainfall is 2763 mm, streamflow is 59%, and evapotranspiration is 33% of the rainfall. The Kalu Ganga catchment hydrology is dominated by the wet season rainfall, which governs the Kalu Ganga flow, where 89% of the annual flow volume is produced. Further, 67% of the flow volume is produced from November to January. The model results show that 89% of the annual average of streamflow is generated as baseflow, a feature of a perennial river. The high baseflow fraction is hydrologically favourable for the water availability of the catchment as this shows the utilizable quantity of water is high.
Powered by DB/Text WebPublisher, from
