Your search found 7 records
1 Wickremaratne, D. 2004. Sri Lankan waterfalls – Volume1. Sri Jayawardenapura, Sri Lanka: Lanka Council on Waterfalls (LCWF) 1 CD.
(Location: IWMI-HQ Call no: CD Col Record No: H037091)
2 Cai, Xueliang; Cui, Y.; Roost, N. 2011. Modelling water flows in irrigated areas - a case study in Zhanghe Irrigation System, China. In Abesser, C.; Nutzmann, G.; Hill, M. C.; Bloschl, G.; Lakshmanan, E. (Eds.). Conceptual and modelling studies of integrated groundwater, surface water, and ecological systems: proceedings of the Symposium HS01 held during the IUGG GA, Melbourne, Australia, 28 June - 7 July 2011. Wallingford, UK: International Association of Hydrological Sciences (IAHS). pp.265-268. (IAHS Publication 345)
(Location: IWMI HQ Call no: e-copy only Record No: H044568)
(0.08 MB) (80.26KB)
Hydrological modelling faces great difficulties in irrigated areas due to the highly dynamic water cycling processes caused by irrigation and drainage practices. This paper describes a study on process-based water balance modelling integrated with remote sensing/GIS spatial analysis in the Zhanghe Irrigation System, southern China. Irrigation water re-use through local water storage was analysed based on remote sensing interpretations and GIS spatial modelling. Time series evapotranspiration is estimated using a Simplified Surface Energy Balance (SSEB) algorithm with Landsat ETM+ imagery. The results are then fed into an irrigation diagnosis and planning tool OASIS to assess the water balance in the irrigated areas and the impacts on irrigation performance. The results revealed that the intensive canal system and local storage with irrigation management practices have significantly altered the hydrological processes of the region. Local storage, including farm ponds, contributed significantly to improve water productivity and sustain high yields at times of main canal failure. The study suggests that, to better model water flows in irrigated systems, a balanced modelling approach is required between simulating the complex hydrological processes and accounting water budget components.
3 Cai, Xueliang; Cui, Y.; Roost, N. 2011. Modelling water re-uses of a tank cascade irrigation system based on satellite and field observations. In Hafeez, M.; Van De Giesen, N.; Bardsley, E.; Seyler, F.; Pail, R.; Taniguchi, M. (Eds.). GRACE, remote sensing and ground-based methods in multi-scale hydrology: proceedings of the Symposium JHS01 held during the IUGG GA in Melbourne, Australia, 28 June - 7 July 2011. Wallingford, UK: International Association of Hydrological Sciences (IAHS). pp.125-130. (IAHS Publication 343)
(Location: IWMI HQ Call no: e-copy only Record No: H044569)
(0.65 MB) (661.26KB)
Many canal irrigation systems in southern China are supplemented by numerous surface storages, which are often connected to one another, leading to improved flexibility in managing water. This study aims to examine the role of storage cascades in capturing and re-using return flows through water balance modelling based on satellite and field observations. The weather data, irrigation application, and pond water level have been monitored in two selected cascades, and a water balance model is developed to account for the dynamic water balance with inputs from remote sensing and GIS analysis. The results showed that, on average, each storage structure is connected to 4.8 others, facilitating intense water re-use in the region. The return flows captured by cascades account for up to 20% of irrigation diversions. However, there are significant losses during the redistribution processes. Remote sensing and GIS-based analysis have proved powerful techniques in parameterizing complex hydrological processes.
4 Aheeyar, M. M. M. 2005. Renovation of minor tanks: problems and prospects. Economic Review, 30(11-12):17-20.
(Location: IWMI HQ Call no: P 8099 Record No: H044755)
(0.53 MB)
5 Jyothi, V.; Panabokke, C. R. 2010. Evolution of the indigenous village irrigation systems of Sri Lanka. Economic Review, April-May:3-9.
(Location: IWMI HQ Call no: e-copy only Record No: H045936)
(1.33 MB)
6 Aheeyar, M. M. M. 2013. Alternative approaches to small tank/cascade rehabilitation: socio-economic and institutional perspective. Colombo, Sri Lanka: Hector Kobbekaduwa Agrarian Research and Training Institute (HARTI). 55p. (HARTI Research Report 162)
(Location: IWMI HQ Call no: 631.7 G744 AHE Record No: H046418)
(0.40 MB)
7 Jayawardena, I. 2015. Sustainable hydro-ecosystem management as echoed in ancient cascade system of Sri Lanka. Soba Parisara Prakashanaya, 24(1):22-24.
(Location: IWMI HQ Call no: P 8159 Record No: H047164)
(0.86 MB)
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