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2017-01～2018-04高崖水准的观测结果出现异常,为研究该异常的机理,本文基于对二维不规则载荷模型的定量模拟和库容、降水量、地下水位等影响因子的定性、定量分析,得到如下认识：1）高崖水库库容载荷变化对高崖水准的影响微弱,基本可忽略不计;2）高崖水准异常变化的主要原因是地下水位变化通过水-岩作用造成水准两端岩体的不一致变形。通过跟踪观测资料的后续变化,验证了水准异常变化机理的合理性。 相似文献
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兴城市地处辽西走廊中部,素有"渤海明珠"之美誉,具有旅游疗养的优越条件。本文从地下拦水坝工程;地表拦水坝和引渗工程;地下水开采工程及管理监测系统等方面论述了地下水库设计方案。对地下水库建成后的库容量进行了计算。 相似文献
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岩溶区修建地下水库，其库容在修建前是难以确定的，本文利用仁怀县长岗山水洞地下河资料，以地下河蓄水空间几何形态概化法和水箱模拟法对拟建地下水库不同水头高度的水库库容进行了计算，其蓄水空间几何形态概化法和水箱模拟法计算结果分别是：坝前水头３０ｍ时，库容量为１９．５７万ｍ＾３和１９．６８万ｍ＾３；坝前水头２０ｍ时，库容量为９．１９万ｍ３和９．３５万ｍ＾３；坝前水头１０ｍ时，库容量为２．４３万ｍ＾３和２． 相似文献
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提到水库发生地震, 人们凭想象往往会认为: 水库容量越大、坝体越高、坝址在地震活动频繁地区, 水库引发地震的可能性越大. 然而, 事实正好相反. 科学家统计分析发现, 水库地震与水库容量和坝体高度均没有明显关系. 世界上迄今为止发生的水库地震, 绝大部分处在地质构造相对稳定的区域内, 而地震频发区域内的水库地震却很少. 这是中国地震台网中心首席预报员、高级工程师孙士鋐的统计结果. 相似文献
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JueyiSUI ChengLIU DaxianFANG JunWANG 《国际泥沙研究》2005,20(2):89-101
Based on long-term measurements at three gauging stations, Toudaoguai, Fugu and Hequ, and one meteorological station, this article discusses the features of discharge (Q) and sediment concentration (Cs) of a river reach of the Yellow River with a reservoir located in the Loess Plateau. The impacts of the local sub-watershed between Toudaoguai and Fugu gauging stations on sediment budget to the Yellow River have been analyzed. In addition, the deposition processes in the Tianqiao Reservoir have been investigated. Results show over 80% of the precipitation that falls in the local subwatershed is unable to contribute to the Yellow River runoff process. It is found that the annualmaximum sediment concentration is usually less than 30 kg/m^3 during flood seasons at Toudaoguai Gauging Station, but the sediment concentration varies dramatically at Fugu Gauging Station. About 35% of the sediment eroded in the sub-watersheds between Toudaoguai and Fugu gauging stationswas produced from the Huangfuchuan sub-watershed which has a drainage area accounting only for 10% of the drainage area between Toudaoguai and Fugu gauging stations. The Tianqiao Reservoir generally has deposition during the summer flood season, and scouring during the non-flood season.On average, over 85% of deposited sediment in the reservoir occurs in the 12 km long lower reservoir reach. The volume of annual deposition in the reservoir mainly depends on the volume of water from the local region between Hequ and Fugu gauging stations. 相似文献
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鹤地水库位于21°37’N、110°18′E，座落在雷州半岛北部的廉江市境内，于60年代初建成使用。最大库容量达11．07亿方，其中有效库容7．67亿方，水库集雨面积1495km’，五大主干渠总长27Ibm，总灌溉面积9．33万公顷、属国家级大型水库之一（见表1）。表1鹤地水库概况随着城乡经济的发展和“三高农业”的兴起，鹤地水库的水资源利用问题越来越受重视。鹤地水库水资源量究竟有多大，供水特点如何，有无潜力可挖。本文从气象水文角度作如下分析。1＄地水库区域降雨特点水库的水源主要靠降雨和地下泉水。降雨量的多少，基本能反映水库水量的… 相似文献
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Strategies for managing reservoir sedimentation 总被引：2，自引：1，他引：1
Zhao-yin WANG Chunhong HU Prof. State Key Lab of Hydroscience Engineering Tsinghua University Beijing China. Prof. Secretary General of International Research Training Center on Erosion Sedimentation Beijing China Vice President of China Institute of Water Resources Hydropower Research No. A- Fuxing Rd Beijing China. 《国际泥沙研究》2009,24(4):369-384
Sediment deposition in reservoirs has caused the loss of 66% of the reservoir capacity in China. The main sedimentation control strategies are： 1） storing the clear water and releasing the turbid water; 2） releasing turbidity currents; 3） Draw-down flushing and empty flushing; and 4） dredging, The paper summarizes these strategies with examples. Sediment transport in many Chinese rivers occurs mostly during the 2-4 month flood season, that is, 80-90% of the annual sediment load is transported with 50-60% of the annual runoff. By storing the clear water after the flood season and releasing the turbid water during the flood season, less sediment deposits in the reservoir while the reservoir is still able to store enough water for power generation in the low flow season. The Three Gorges and Sanmenxia reservoirs apply this strategy and control sedimentation effectively. Turbidity currents have become the main sedimentation control strategy for the Xiaolangdi Reservoir. Empty flushing involves reservoir draw-down to temporarily establish riverine flow along the impound reach, flushing the eroded sediment through the outlets. Case studies with the Hengshan Reservoir and Zhuwo Reservoir are presented. Jet dredgers have been used to agitate the reservoir deposit so that the deposit is released from the reservoir with currents. The sediment releasing efficiency is 30-100% for storing the clear and releasing the turbid; 6-40 % for turbidity current; and 2,400-5,500% for empty flushing. Empty flushing causes high ecological stress on the ecosystem to the downstream reaches. Storing the clear and releasing the turbid is the best strategy to control reservoir sedimentation while achieving hydro-power benefit and maintain ecological stability. 相似文献
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城市化过程中土地利用变化对区域滞洪库容量的影响研究——以南京市河西地区为例 总被引：2，自引：2，他引：0
通过对两期LandsatTM遥感影像进行监督分类,提取近20年南京市河西地区土地利用变化状况,用转移矩阵、迁移概率和迁移量比重模型来说明河西地区的土地利用变化,并根据地表状况和土壤的压实程度提出了不同土地利用类型的区域滞洪库容量计算模型,从而估计土地利用变化对水分调节功能的影响。研究发现:①河西地区土地利用变化的主要特征为以其他土地利用类型向建筑用地的转移为主,旱地内部的转移和水田向旱地(主要是菜地)的转移也占有一定的比重;②由于地表封闭和种植结构的改变导致区域滞洪库容量大量损失,1986年到2003年总滞洪库容量减少了550.40万m3其中因建筑用地面积的增加使地表封闭而减少的滞洪库容量高达482.15万m3,相当于整个研究区域86mm水深;③局部范围的土壤压实只对局部的滞洪库容量产生影响而对区域的总的滞洪库容量的影响不大,1986年到2003年因土壤压实而减少的滞洪库容量只有3.12万m3,只占总滞洪库容减少量的0.54%。研究表明减少地表封闭是防止城市瞬时洪涝灾害的重要方面。 相似文献
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今年以来,河南省地矿局第一地质矿产调查院在洛阳大力开展尾矿库调查工作。目前,436座尾矿库全部完成野外地质调查,转入报告编写阶段。据了解,洛阳地区现存尾矿库436座,以山谷型尾矿库的湿式堆存为主,总库容量达3.53亿立方米。 相似文献