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Floodwater Harvesting to Manage Irrigation Water and Mesquite Encroachment in a Data‐Sparse River Basin: An Eco‐Hydrological Approach

  • This investigation attempts to understand the eco‐hydrology of, and accordingly suggest an option to manage floodwater for agriculture in, the understudied and data‐sparse ephemeral Baraka River Basin within the hyper‐arid region of Sudan. Reference is made to the major feature of the basin, that is, the Toker Delta spate irrigation scheme. A point‐to‐pixel comparison of gridded and ground‐based data sets is performed to enhance the estimates of rainfall. Analysis of remotely sensed land use/cover data is performed. The results show a significant reduction of the grassland and barren areas explained by a significant expansion of the cropland and open shrubland (invasive mesquite trees) areas in the delta. The cotton sown area is highly dependent on the flooded area and the discharge volume in the delta. However, the area of this major crop has declined since the early 1990s in favour of cultivation of more profitable food crops. Expansion of mesquite in the delta is problematic, taking hold under increased floodwater, and can only be manged by clearance to provide crop cultivation area. There is a great potential for floodwater harvesting during the rainfall season (June to September). A total seasonal runoff volume of around 4.6 and 10.8 billion cubic metres is estimated at 90 and 50% probabilities of exceedance (reliabilities), respectively. Rather than leaving the runoff generated from rainfall events to pass to the Red Sea or be consumed by mesquite trees, a location for runoff harvesting structure in a highly suitable area is proposed. Such a structure will support any policy shifts towards planning and managing the basin water resources for use in irrigating the agricultural scheme.

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Verfasserangaben:Zryab Babker, Nadir Ahmed Elagib, Islam Sabry Al Zayed, Rayyan Sulieman
Titel des übergeordneten Werkes (Englisch):River Research and Applications
Verlag:John Wiley & Sons, Ltd.
Verlagsort:Chichester, UK
Dokumentart:Wissenschaftlicher Artikel
Datum des Hochladens:04.10.2021
Freies Schlagwort / Tag:Baraka River Basin; Mesquite; Toker Delta; eco‐hydrology; floodwater harvesting; land‐cover classification
Ausgabe / Heft:9
Fakultäten und Zentrale Einrichtungen:Fakultät für Raumentwicklung und Infrastruktursysteme (F12) / Fakultät 12 / Institut für Technologie und Ressourcenmanagement in den Tropen und Subtropen
Lizenz (Deutsch):License LogoCreative Commons - CC BY - Namensnennung 4.0 International