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首页> 外文期刊>River Research and Applications >Floodwater harvesting to manage irrigation water and mesquite encroachment in a data-sparse river basin: an eco-hydrological approach
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Floodwater harvesting to manage irrigation water and mesquite encroachment in a data-sparse river basin: an eco-hydrological approach

机译：在数据稀疏的河流河流域中管理灌溉水和玉米侵蚀的洪水 - 一种生态水文方法

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摘要

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.
机译：该调查试图了解生态水文，因此建议管理苏丹超干旱地区内部的农业洪水，包括洪水的洪水。参考盆地的主要特征，即TOKER DELTA灌溉方案。执行网格和基于基于地基数据集的点对像素比较，以增强降雨的估计。进行远程感应的土地使用/覆盖数据的分析。结果表明，草地和贫瘠地区的显着减少了由Delta中的农作物和开放灌木（侵入性豆科泥树）区域的显着扩张解释。棉花播种区域高度依赖于洪水区域和三角洲的放电体积。然而，自20世纪90年代初以来，这一主要作物的地区有利于培养更有利可图的粮食作物。在三角洲扩张乳房的扩张是有问题的，在洪水的增加下持有，并且只能通过许可来提供作物培养区域。降雨季节（6月至9月）洪水收获有巨大潜力。大约4.6和108亿立方米的总季节性径流量分别估计了90％和50％的超标（可靠性）。提出了提出了提出了在高度合适的区域中通过摩登树消耗的降雨事件生成的径流或者被萌芽的树木消耗。这种结构将支持任何政策转向规划和管理盆地水资源，以供灌溉农业计划。

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