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首页> 外文会议>2nd International Conference on Silting Problems in Hydropower Plants Sep 26-28, 2001 Bangkok, Thailand >SILTATION OF RESERVOIRS ― KOYNA HYDROELECTRIC PROJECT ― A CASE STUDY
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SILTATION OF RESERVOIRS ― KOYNA HYDROELECTRIC PROJECT ― A CASE STUDY

机译：储层的分离― KOYNA水电项目―案例研究

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摘要

Sediment is a major problem in the control and utilisation of the surface water on the earth. Phenomenon of deposition is complex one and governed by number of parameters. As such it is very difficult to simulate the deposition phenomenon in the model having limited dimensions and inadequate data. Sediment deposition pattern can be worked out / predicted by various methods. This Institute has carried out sedimentation study of Koyna hydroelectric project which is the largest hydroelectric project in Maharashtra generating 960 MW of power. The outcome of this study is discussed in this paper. It is found that siltation rate at the end of 1986 survey (1961 to 1986) works out to be 8.10 ha-m/ 100 sq km/year. It is about 1.25 times that of designed rate. Out of total silt 19% is deposited in dead storage and 81% is deposited in live storage zone. Sediments deposited mainly consists of silt and clay and has smaller percentage of particles coarser than 0.075 mm. Finer particles are deposited near the dam and coarser particles deposited away from the dam. Though sediment deposition has occurred in the reservoir, it has not caused any serious erosion or damage to the impellers of turbines of the power house since last 25 years.
机译：泥沙是控制和利用地球上地表水的主要问题。沉积现象是一种复杂的现象，受参数数量控制。因此，很难在尺寸有限且数据不足的模型中模拟沉积现象。沉积物沉积模式可以通过各种方法来计算/预测。该研究所已经进行了科伊纳水电项目的沉降研究，该项目是马哈拉施特拉邦最大的水电项目，发电量为960兆瓦。本文讨论了这项研究的结果。结果发现，在1986年调查结束时（1961年至1986年），淤积速率为8.10公顷/百平方公里/年。是设计速度的1.25倍左右。在全部淤泥中，有19％沉积在死区中，而81％沉积在活区中。沉积的沉积物主要由淤泥和粘土组成，且大于0.075 mm的颗粒所占的百分比较小。较细的颗粒沉积在坝附近，较粗的颗粒沉积在坝附近。尽管在水库中发生了沉积物沉积，但自最近25年以来，它并未对电站的涡轮机叶轮造成任何严重的侵蚀或破坏。

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