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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 >DESANDING FOR SMALL HYDRO ― AN INNOVATIVE APPROACH
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DESANDING FOR SMALL HYDRO ― AN INNOVATIVE APPROACH

机译：小型水力喷射的创新方法

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摘要

Practically all hydroelectric projects (except with storage dams or those on canal falls) in the Himalayan region have incorporated preventive and/or curative methods of desanding the inflow diverted for power generation. However, most of these projects have reported extensive to considerable damage due to high concentration of suspended sediment in river waters during monsoon. Desanding approach on some of the constructed and ongoing projects indicates a conscious effort for removal of a limiting particle size, which normally tends to be larger than 0.15 mm onwards. However, concentration of sediment receives indirect attention only. Paradoxically, a recent research has reported quartz particles in the range of 0.05 mm size to be potentially harmful, and abrasion intensity to be a linear function of mean sediment content in the flow. Given the above background, an innovative approach to deal with sediment concentration and removal of sediment including fine sediment, developed by the author while working on two small hydroelectric projects namely the 22.5 MW-Ganwi and the 3 MW-Gumma (both in Himachal Pradesh, India), has been adopted on the two projects, which have since been commissioned in the year 2000. The paper presents the adopted desanding arrangements and brings out the 'three distinct features' of the approach namely Easier, Efficient and Economical (termed as 'E-3').
机译：实际上，喜马拉雅地区的所有水力发电项目（带有蓄水坝或落在运河上的水坝除外）都采用了预防和/或治疗方法，对流向发电的水流进行除砂。但是，由于季风期间河水中悬浮泥沙的高度集中，这些项目中的大多数已报告了严重破坏。在一些已建设和进行中的项目上进行的除砂方法表明，有意识地努力去除了极限粒径，该粒径通常趋于大于0.15毫米。但是，沉淀物的浓度仅受到间接关注。矛盾的是，最近的一项研究报告称，直径在0.05毫米范围内的石英颗粒可能有害，而磨蚀强度则是流中平均沉积物含量的线性函数。鉴于上述背景，作者在两个22.5 MW-Ganwi和3 MW-Gumma（均在喜马al尔邦，印度）已在这两个项目中得到采用，这两个项目已于2000年投入使用。该文件介绍了已采用的除砂安排，并提出了该方法的“三个鲜明特征”，即更简便，高效和经济（称为“ E-3'）。

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