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1 Mailhol, J. C.; Gonzalez, J. M.. 1993. Furrow irrigation model for real-time applications on cracking soils. Journal of Irrigation and Drainage Engineering, 119(5):768-783.
Furrow irrigation ; Soil properties ; Infiltration ; Models ; Calibrations ; Field tests ; Statistical analysis ; Water use efficiency / France
(Location: IWMI-HQ Call no: PER Record No: H013359)
Clay soils frequently develop large cracks after irrigation. Infiltration equations therefore need to be modified to take cracking soil properties into account when modeling and optimizing furrow irrigation. In this article, we propose an infiltration equation for cracked soils, based on two parameters. Other parameters of the global model are assumed to be known (furrow length, shape, slope, and estimated roughness). One parameter is linked to the type of soil and is calibrated separately for the entire irrigation process. The second parameter takes soils' cracks into account and is calibrated in real time during the advance phase (before the water front overruns the middle of the plot). This global furrow irrigation model for cracked soils is derived from a conceptual approach and can be used either to predict in real time, water-use efficiency during irrigation (infiltrated volume, runoff water losses, uniformity) or to optimize irrigation parameters (head flow, irrigation duration). The model was tested and validated on three irrigation applications on 60 furrows in a corn field in Tarascon in southeastern France. This conceptual model can be easily adapted to the statistical approach, which is based on the variability of water advance between the furrows.
2 Gonzalez, J. M.; De Leon, B.; Rendon, L.; Robles, B.; Lomeli, R. 1996. Systeme d'information pour la gestion de la maintenance des perimetres irrigues du Mexique (SIMA) [Information system for maintenance control of Mexican irrigation districts (SIMA)]. In ICID, 16th Congress on Irrigation and Drainage, Cairo, Egypt, 1996: Sustainability of Irrigated Agriculture - Transactions, Vol.1E, Special session: The future of irrigation under increased demand from competitive uses of water and greater needs for food supply; Symposium - R.2: Management Information Systems in irrigation and drainage. New Delhi, India: ICID. pp.15-21.
(Location: IWMI-HQ Call no: ICID 631.7.1 G000 ICI Record No: H019586)
3 Gonzalez, J. M.; Matrosov, E. S.; Obuobie, E.; Mul, M.; Pettinotti, L.; Gebrechorkos, S. H.; Sheffield, J.; Bottacin-Busolin, A.; Dalton, J.; Smith, D. Mark; Harou, J. J. 2021. Quantifying cooperation benefits for new dams in transboundary water systems without formal operating rules. Frontiers in Environmental Science, 9:596612. [doi: https://doi.org/10.3389/fenvs.2021.596612]
Dams ; International waters ; Water systems ; International cooperation ; Infrastructure ; River basins ; Reservoir operation ; Water policies ; Hydropower ; Ecosystem services ; Environmental flows ; Irrigation ; Simulation models / Ghana / Volta River Basin / Pwalugu Multipurpose Dam
(Location: IWMI HQ Call no: e-copy only Record No: H050729)
https://www.frontiersin.org/articles/10.3389/fenvs.2021.596612/pdf
https://vlibrary.iwmi.org/pdf/H050729.pdf
https://vlibrary.iwmi.org/pdf/H050729.pdf
(9.16 MB) (9.16 MB)
New dams impact downstream ecosystems and water infrastructure; without cooperative and adaptive management, negative impacts can manifest. In large complex transboundary river basins without well codified operating rules and extensive historical data, it can be difficult to assess the benefits of cooperating, in particular in relation to new dams. This constitutes a barrier to harmonious development of river basins and could contribute to water conflict. This study proposes a generalised framework to assess the benefits of cooperation on the management of new dams in water resource systems that do not have formal sharing arrangements. Benefits are estimated via multi-criteria comparison of historical reservoir operations (usually relatively uncooperative) vs. adopting new cooperative rules which would achieve the best results for riparian countries as evaluated by a water resources simulator and its performance metrics. The approach is applied to the Pwalugu Multipurpose Dam (PMD), which is being built in Ghana in the Volta river basin. The PMD could impact downstream ecosystems and infrastructure in Ghana and could itself be impacted by how the existing upstream Bagre Dam is managed in Burkina Faso. Results show that with cooperation Ghana and Burkina Faso could both increase energy production although some ecosystem services loss would need to be mitigated. The study confirms that cooperative rules achieve higher overall benefits compared to seeking benefits only for individual dams or countries.
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