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首页> 外文会议>International Congress on Conservation and Rehabilitation of Dams, Nov 11-13, 2002, Madrid, Spain >Improving flood control capacity of High Aswan Dam and elevation of flooding
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Improving flood control capacity of High Aswan Dam and elevation of flooding

机译：提高高阿斯旺水坝的防洪能力和洪水高度

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High floods brought considerable damages with them. Sometimes not only the fields but erosion occurred in the riverbanks and beds. The important navigation on the Nile was seriously hampered. Various schemes for flood protection have been proposed from time to time, but it was limited, because the water passing down the river to the sea exceeded the safe margin. Reached to 162-milliard m~3, of which 41-milliard m~3 specified as flood control capacity, between elev. 175, 182 m U.S. the Dam. If several high floods occur in sequence, the reservoir water level becomes comparatively high. According to instruction of operation for. The High Dam, the flood control capacity must be emptied down to level 175m, before the arrival of the following. Flood, this will result in releasing high discharges, that may reach 350-400 million-m~3/day. In this case, further degradation is expected. This may affect the riverbed, downstream the control structures existing on the river; the canal intakes and water pumping station. To avoid this, it was decided to make use of one of the western valleys (khor Toshka), connecting a huge depression (Toshka Depression) on the western desert to the reservoir, to act as additional spillway named as Toshka Spillway. When the live storage of the lake reached to the max. level (175 m). In spite of this case, the High Dam had been controlled by passing discharges through Toshka Spillway (total 12.60 billion m~3) beside, additional limited discharges D.S. Also the next flood (1999/2000) was high. Max. lake water level reached to (181.60m), which is less than the designed level by only 0.40m. This high flood was also been controlled by passing (14.1 milliard m~3) through Toshka Spillway. Flood of years (2000/2001) and (2001/2002) were above average and high, they had been controlled by passing (8.3, 5.7 milliard m~3) through the spillway. It would cause significant damages. So, Toshka Spillway improved flood control capacity and in conjunction with High Aswan Dam had played an important part in controlling and floods.
机译：高洪水给他们带来了相当大的损失。有时不仅是田地，而且侵蚀发生在河岸和河床中。尼罗河上的重要航行受到严重阻碍。曾不时提出各种防洪计划，但由于受到限制，因为从河流流到大海的水量超过了安全范围。海拔达到162密耳m〜3，其中41密耳m〜3指定为防洪能力。美国大坝175、182 m。如果连续发生几次高洪灾，则水库水位将变得相对较高。根据操作说明进行。高坝，在以下项目到达之前，必须排空防洪能力至175m。洪水将导致释放高流量，可能达到每天350-400百万立方米〜3。在这种情况下，预计会进一步退化。这可能会影响河床，河上现有控制结构的下游；渠口和水泵站。为避免这种情况，决定利用西部山谷之一（khor Toshka），将西部沙漠上的一个巨大洼地（Toshka洼地）连接到水库，作为名为Toshka溢洪道的附加溢洪道。当湖的生活存储达到最大。高度（175 m）。尽管有这种情况，但高坝还是通过将排放物通过Toshka溢洪道（总计126亿立方米3）进行控制的，另外还有有限的排放量D.S.而且下一次洪水（1999/2000）也很高。最高湖泊水位达到（181.60m），仅比设计水位低0.40m。通过（14.1毫米m〜3）通过Toshka溢洪道来控制这一高洪水。年份（2000/2001）和（2001/2002）的洪水高于平均水平和较高水平，通过溢洪道的控制（8.3、5.7毫米3）进行了控制。否则会造成重大损失。因此，Toshka溢洪道提高了防洪能力，并与High Aswan大坝一起在防洪和洪水中发挥了重要作用。

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