共查询到20条相似文献,搜索用时 31 毫秒
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李利蓉 《河南水利与南水北调》2019,48(1)
该水库位于贵州省务川县境内的洪渡河下游,经初步勘察显示,水库具备较好的成库条件,水库区两岸山体雄厚,库盆的地层岩性以灰岩为主,碎屑岩主要分布于库尾,但其与邻谷之间有相对隔水的碎屑岩分布,因此,不存在向邻谷永久渗漏问题。但由于库首有较大范围的可溶岩分布,岩溶发育且岩溶水文地质条件复杂,存在一定范围的岩溶渗漏问题,可结合绕坝渗漏进行防渗处理。 相似文献
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通过在坝址区投入较少而必要的勘探工作量,而区域及库区仅作地表和岩溶地质调查的基础上,对测区岩溶的分布及发育规律,地下水的补给、径流、排泄等的研究,分析论证了近坝库段右岸向邻谷渗漏的不可能性这一关键环节,从而探讨解决水库渗漏问题。 相似文献
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吴家庄水库坝址区岩洛渗漏是最主要的工程地质问题,直接影响建库规模和工程的可行性。通过对库区岩溶发育规律、特征及库区岩溶渗漏条件进行分析、计算、评价,认为水库正常高水位825m为宜。 相似文献
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朱昌河水库位于分水岭地带,其间碳酸盐岩广布,岩溶发育,岩溶水文地质条件复杂,库区灰岩与南面邻谷索桥河灰岩相连,从地形地貌看,水库存在向南部低邻谷产生岩溶渗漏的条件。经过野外大量的勘探物探及试验工作,证实了在朱昌河与索桥河之间存在地下分水岭,水库蓄水到正常蓄水位时,库水不会向低邻谷产生岩溶渗漏,但存在绕坝渗漏的可能性。 相似文献
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吴家庄水库坝址区岩溶渗漏是主要的工程地质问题,直接影响建库规模和工程的可地性。通过对库区岩溶发育规律、特征及库区岩溶渗漏条件进行分析、计算和评价,得出水库正常高水位应以825mm为宜。 相似文献
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《水力发电》1995,(12)
华能四川分公司组建于1990年6月,5年来已合资开工建设了太平驿(26万kW)、东西关(18万kW)、铜头(8万kW)、雨城(6万kW)4座水电站,总装机58万kW,于1994年起陆续投产发电。计划第二批建设的有5座水电站,汁92.5万kW,1996年~1998年全部开工。规划2000年华能四川水电将超过100万kW。华能办水电完全是一种新的机制在运作。经过5年来的探索与实践,其主要做法是:实行项目业主责任制.投资、建设、生产管理一体化;引进竞争机制,提倡“四位一体”的合作精神;以“项目高起点、建设高速度、管理高水平、经营高效益”为目标,赶超世界先进水平;实现规模经营,流域梯级滚动综合开发;发挥合作伙伴优势,创造良好的外部环境,加快发展水电事业。 相似文献
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Asit K. Biswas 《国际水资源开发杂志》2004,20(1):3-14
The current debate on dams has become dogmatic, emotional, and somewhat counterproductive. There is no one single solution that would be valid for a heterogeneous world, with differing climatic, physical, social, economic and environmental conditions; varying institutional, technical and management capacities; dissimilar institutional and legal frameworks for managing water; and divergent levels of development and available technology. No single paradigm can be equally valid for all these differing conditions, and this includes dams. What is needed is a systematic approach, where the main objectives of water developments are first identified, i.e., poverty alleviation, regional income redistribution, economic efficiency and environmental conservation. The best alternative available to achieve these objectives for the area in question should then be sought. The best solution may or may not include dams. In the field of water development, small is not always beautiful and big is not always magnificent. Solutions must be case-specific, and they could vary from one location to another, and even at the same location over time. Solutions may include construction of dams, large, medium or small, and/or other alternatives such as rainwater harvesting and groundwater recharge. There cannot be one, single, dogmatic, a priori answer of dams or no dams, in terms of optimal water resources development, which will suit all the different conditions of all the countries of this world, either at present, or for decades to come. 相似文献
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小浪底水利枢纽工程是黄河干流三门峡以下唯一能够取得较大库容的控制性工程,建成后将在防洪、防凌和减淤,以及供水、灌溉、发电等方面发挥巨大的作用。该工程地理位置特殊、规模宏大、结构复杂、被认为是世界上最具挑战性的工程之一,其深覆盖层防渗墙的施工,大规模复杂洞室群的布置与施工,大体积、高强度的主坝填筑工程等都具有相当的难度和很高的水平。为加快小浪底工程的建设,采取国际招标方式确定了承包商,在建设过程中实行业主负责制、建设监理制和合同管理制;在设计、施工中采取了大量的新技术、新工艺及先进的设备。工程将于1997年截流,2000年首台机组投产发电,2001年竣工。 相似文献
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《Water science and technology》1998,37(8):119-127
Bioleaching can be one of few techniques applicable for the removal of toxic metals from polluted soils or sediments. Its principle is a microbial production of sulphuric acid and leaching of metals with it. The use of bioleaching can benefit from the use of low-cost substrates and from a possible coupling to other processes of microbial sulphur cycle, like sulphate reduction to treat spent bioleaching liquor, or partial sulphide oxidation to recycle sulphur. For the evaluation of bioleaching, the existence of different leaching strategies is considered, i.e. intensive or extensive extraction. The intensive extraction uses high concentrations of acid at short extraction times, whereas low acid additions and long treatment times are used in extensive processes. On a reference study with wetland sediment receiving mine drainage we demonstrated that the hioleaching is a typical extensive process. The bioleaching experiments involved the use of the different sulphur substrates, i.e. orthorhombic sulphur flower and microbially produced, recycled sulphur from partial sulphide oxidation process. The latter type of sulphur substrate performed considerably better. 相似文献
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龙滩水电站的枢纽布置 总被引:1,自引:1,他引:0
1990年初步设计审查会议基本同意设计提出的枢纽布置方案。之后,根据审查会议明确的碾压混凝土重力坝坝型和枢纽布置优化的要求,结合考虑左坝头岩体处理,改善泄洪和后期导流条件,扩大坝体采用碾压混凝土范围,设计人员重点研究了“4+5”方案和“0+9”方案,最后推荐0+9”方案。 相似文献