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采用三峡水库汛期分期方案,将蓄水时间提前至汛末期,综合考虑上下游防洪、发电、通航和蓄满率等要求,建立了多目标蓄水调度模型,构建了"优化-模拟-检验"的算法流程,采用遗传算法进行求解。结果表明,最优方案在满足上下游防洪安全要求的前提下,蓄水期可增发电量17%,减少弃水44%,蓄满率和通航保证率显著提高。通过对汛末期防洪库容进行科学划分和对蓄水调度图进行优化,既确保防洪安全又最大限度挖掘兴利效益,为研究水库汛末蓄水调度问题提供了一种新的思路和方法。 相似文献
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The Yudonghe landslide is located in a upcoming reservoir region of a 233-m-high Shuibuya rockfill dam, 2,300 m away from
the dam site. It consists of a massive landslide with upper and lower segments and two secondary slides, i.e. an eastern secondary
slide and a western secondary slide. In this paper, values of factor of safety (FS) for various masses were calculated in
a scenario of reservoir impounding-induced increase in groundwater levels, using a method of three-dimensional (3D) limit
equilibrium. Results showed that the smallest value of FS for the massive landslide is 1.12 computed on the presupposition
of reactivating along a bottom slide zone in case of an earthquake. The smallest FS value of the lower slide mass is 1.12
in a possible direction, given earthquake occurrence and a groundwater level of 225 m above the sea level. This FS value shows
that the lower slide mass is stable in case of groundwater increasing. In addition, by the calculation of the 3D limit equilibrium
method, the FS value of the east secondary slide is approximately 1.0 in different groundwater levels under consideration
of earthquake occurrence, which reflects that this mass is prone to reactivate when external factors are taken into effect. 相似文献
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澜沧江漫湾电站水库诱发地震分析 总被引:5,自引:0,他引:5
全面分析了漫湾电站水库蓄水前后,库坝区周围地震活动时空强分布,水库蓄水的水位与库坝区地震活动的动态变化关系,结果表明,漫湾水库诱发地震的时间集中于蓄水后5年内,库水位升降之后1个月左右,库坝区发生高频度的3~4级地震,最大月频次为蓄水前的6倍,最大地震震级为4.6级,空间分布集中于大坝约10km范围内,为快速响应、震群型的诱发地震。 相似文献
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香港水资源特征和供需水量平衡研究 总被引:2,自引:2,他引:2
论述香港水资源特点与水量供需平衡问题,内容包括:(1)香港自然地理和水资源特点;(2)香港目前的供水来源;(3)香港目前总需水量及各行业、各地区需水量情况;(4)东深工程对香港的供水情况;(5)对未来香港供需水量的预估;(6)香港未来供水存在问题和建议。 相似文献
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Evidence for induced seismicity in the vicinity of Fierza reservoir,Northern Albania 总被引:1,自引:0,他引:1
Betim Muço 《Pure and Applied Geophysics》1991,136(2-3):265-279
The reservoir of Fierza on the Drini River, Northern Albania, is Albania's largest reservoir and it is one of the world's largest reservoirs of high dams (reservoir volume at maximum water level, 2.8 * 109 m3; dam height, 167 m and dam capacity 8 * 106 m3). We compare pre-and postimpounding seismicity of the area surrounding the Fierza reservoir. An increase of seismic microactivity was observed after the impounding of the reservoir. More than 300 microearthquakes, occurred in the immediate vicinity of the main body of the reservoir, with local magnitude ranging between 1.3 and 3.6. A significant change of theb value in the magnitude-frequency relationship was observed. One swarm of microtremors occurred in the northern part of the reservoir on April 4–5, 1981, where an alteration of the tensor of natural tectonic stresses is revealed. The theoretical additional stress and displacement induced by water-load in the bank of the reservoir were estimated for four cross-profiles of the reservoir area and the maximum values resulted near the location of the above swarm. 相似文献
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紫坪铺水库蓄水前天然地震活动 总被引:8,自引:0,他引:8
紫坪铺水库位于龙门山断裂带。了解和掌握水库蓄水前库坝区及其周围天然地震活动背景水平,可对水库诱发地震的危险性进行前期评价,可为蓄水后的诱发地震活动监测提供可靠的鉴别依据。紫坪铺水库地震台网在水库蓄水前运行逾1年,本文用这批资料提供表征库区及附近和库坝区蓄水前天然地震活动水平确切实用的各项指标。用全国和四川台网地震资料,给出含库区的较大区域地震活动背景和对库区的影响。 相似文献
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水库蓄水对库岸滑坡的影响研究 总被引:6,自引:1,他引:5
水库蓄水将显著改变库岸的水文地质条件,进而影响滑坡的稳定状态。以鄂西南某水库为例,阐述了库水位对滑坡稳定性影响的一般规律,并采用剩余推力法计算分析了滑带土抗剪参数、库水位变化和地下水疏干系数对库岸滑坡的影响。在此基础上,对蓄水后库岸滑坡的变形模式进行了模拟分析。研究表明,水库蓄水不仅使滑坡稳定性发生变化,滑坡的变形模式也将由推移式转变为牵引式。 相似文献