Your search found 4 records
1 Roost, N.; Molden, D.; Zhu, Z.; Loeve, R. 2003. Identifying water saving opportunities: examples from three irrigation districts in China’s Yellow River and Yangtze basins. In Yellow River Conservancy Commission. Proceedings, 1st International Yellow River Forum on River Basin Management - Volume II. Zhengzhou, China: The Yellow River Conservancy Publishing House. pp.139-148.
River basins ; Water resource management ; Water conservation / China / Yellow River / Yangtze basins
(Location: IWMI-HQ Call no: 333.91 G592 YEL Record No: H033853)
(0.73 MB)
2 Roost, N.. 2003. Improving irrigation water use efficiency, productivity and equity: Simulation experiments in the downstream Yellow River Basin. In Yellow River Conservancy Commission. Proceedings, 1st International Yellow River Forum on River Basin Management - Volume II. Zhengzhou, China: The Yellow River Conservancy Publishing House. pp.166-174.
River basin development ; Irrigated farming ; Water use efficiency ; Irrigation efficiency ; Simulation models / China / Yellow River Basin
(Location: IWMI-HQ Call no: 333.91 G592 YEL Record No: H033855)
(0.64 MB)
3 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)
Flow discharge ; Irrigation systems ; Irrigation water ; Tanks ; Waterfalls ; Case studies ; Water balance ; Models ; Calibration ; GIS ; Remote sensing / China / Zhanghe Irrigation System
(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.
4 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)
Tanks ; Waterfalls ; Models ; Irrigation systems ; Canals ; GIS ; Remote sensing ; Satellite surveys ; Water balance ; Water reuse ; Monitoring / China / Zhanghe Irrigation System
(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.
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