The main two tributaries of the Nile, Atbara and the Blue Nile, when in flood carry along, solid matter which has been washed by the rains off the catchment area, and transported by the Nile water. Since 1964, the year of the Nile diversion, and due to the formation of the huge Artificial Lake upstream the dam, the majority of the transported sediments was trapped in the reservoir (Nasser Lake). Nasser Lake, southern Egypt, one of the largest man-made reservoirs in the world, extends over about 350 km in the Egyptian territory and about 150 km inside Sudan. Max. water depth in the dam site area is about 100 m. The total capacity of the lake (162 milliard m~3), is divided into 3 capacities, the dead capacity (31 milliard m~3), the live capacity (90 milliard m~3), and the flood control capacity (41 milliard m~3). Therefore the dead capacity that designed for sedimentation represents a ratio of 1/5 from the total lake capacity and a ratio of 1/3 from the total live storage capacity. The High Dam Lake is a good example as an artificial lake can receipt, average annually 135 million tons of sediments. The average annual rates of sedimentation in the Egyptian borders partly less than that in the Sudanese borders and represents about (15―20%) from the total ratio of the sediments in the lake per year. So, High and Aswan Dams Public Authority (HADA) sent many annual surveying missions starting from 1973 to the sedimentation area for researches and investigations related to that phenomena. Selected stations were fixed. The form of the collected data are on, velocity measurements, suspended sediment samples, hydro-graphical survey, freshly deposited sedimentation samples, and chemical analysis of water samples. It's noticed that the majority of sediment deposition occurs at the tail zone of the reservoir, and movement of sediment deposition will be along the lakebed in the downstream direction towards the Egyptian borders (North). So, HADA begins to establish the pre-feasibility studies about extraction of the sediments, transportation and utilization, with research institutes that belongs to the Ministry of Water Resources and Irrigation in Egypt. Two extraction methods have been suggested and studied to use in the highly sedimentation sectors in the lake inside Egyptian borders. The first method by using mobile dredges. The second one by sacking the sediments using sack pumps.
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机译：尼罗河的主要两个支流，Atbara和蓝尼罗河，当洪水携带时，通过从集水区的降雨冲下来并被尼罗河运输的固体物质。自1964年以来，尼罗分子的年份，由于大坝上游的巨大人造湖的形成，大部分运输沉积物被困在水库（纳斯湖）。南埃及南部是世界上最大的人造水库之一，埃及领土延伸约350公里，苏丹约有150公里延伸。最大限度。坝址区的水深约为100米。湖的总容量（162毫毫米M〜3）分为3个容量，死亡容量（31毫米M〜3），现场容量（90毫米M〜3），以及防洪容量（41毫米m〜3）。因此，设计用于沉降的死亡能力代表了总湖泊容量的1/5的比例，比例从总现场储存能力的比例为1/3。高坝湖是一个很好的例子，作为人工湖可以收到，平均每年1.15亿吨沉积物。埃及边界的平均年龄沉积沉降率部分少于苏丹边界，占每年湖泊沉积物总比例的约（15-20％）。因此，高和Aswan Dams Public Authow（Hada）从1973年开始向与该现象有关的研究和调查开始的沉降区域。选择的车站是固定的。收集数据的形式在于，速度测量，悬浮沉积物样本，水力图表调查，新沉积的沉降样本以及水样的化学分析。注意到，大部分沉积物沉积在储层的尾部发生，沉积物沉积的运动将沿着下游方向的湖边朝向埃及边界（北）。因此，哈达开始建立关于提取沉积物，运输和利用的可行性研究，其中属于水资源和埃及灌溉部的研究机构。已经提出了两种提取方法，并研究了在埃及边界内湖中的高度沉淀部门使用。使用移动疏浚的第一种方法。通过麻袋泵解雇沉积物的第二个。
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