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琅琊山抽水蓄能电站利用已建的城西水库作为下水库,以日调节方式承担安徽电网调峰、填谷任务,同时还具备事故备用、调相等功能.为协调城西水库向抽水蓄能电站和城市供水矛盾,本文阐述琅琊山抽水蓄能电站及下水库的调度运行方式,为保证本站安全运行提出意见和建议. 相似文献
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一般抽水蓄能电站的水库规模和坝址集雨面积相对较小,装机容量相对较大,抽水、发电水量占天然洪量的比重较大,在洪水调节计算时,不仅要考虑天然洪水过程,还要考虑抽水、发电流量,两者进行不利组合,使设计建筑物能适应抽水蓄能电站的运行要求.抽水蓄能电站的水库调洪与常规水库最大的区别就在于需考虑抽水、发电流量,为此提出几种在调洪计算时如何考虑抽水、发电流量的方法,供参考. 相似文献
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吴蓂高 《水利水电科技进展》2003,(1)
20 0 0年 3月 ,我国广州抽水蓄能电站建成 ,装机 8台 ,共 2 4 0万kW ,超过了美国装机 6台共 2 10万kW的巴斯康蒂抽水蓄能电站 ,成为当前世界上最大的抽水蓄能电站 .可是这一记录 ,数年后将被日本另一巨型抽水蓄能电站打破 .在建中的神流川抽水蓄能电站位于日本的群马县和长野县境内 ,上水库在长野县 ,为粘土心墙堆石坝 ,坝高 136m ,下水库在群马县 ,为碾压混凝土重力坝 ,坝高 12 0m .地下厂房在群马县 ,共有 2座厂房 ,1号厂房内装机 4台 ,单机容量 4 5万kW ,共 180万kW ,2号厂房内装机 2台 ,单机容量也是 4 5万kW ,共 90万kW … 相似文献
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抽水蓄能电站洪水调节计算与常规水电站差异较大,通常发电流量对抽水蓄能电站下水库洪水调节成果影响明显.根据黑麋峰抽水蓄能电站的特点,提出了电站下水库洪水调度规则,并进行了电站满发流量与天然洪水不同组合的洪水调节计算.对电站下水库洪水调度规则及洪水调节成果的分析探讨,可为类似抽水蓄能电站调洪计算提供借鉴. 相似文献
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1 电站概况 白山抽水蓄能电站是在已建白山一、二期电站的条件上,利用已有白山水库为上库、下游红石水库为下库而修建的常蓄结合抽水蓄能电站.原设计为抽水蓄能泵站,工程开工后增加了发电功能. 相似文献
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对嘉兴地区主要给水厂近年来应用立体弹性填料、LT型悬浮球填料、YS型悬浮填料、卵石填料等的生物预处理工艺从填料及配套设施、工艺运行参数、运行效果、成本等方面进行了比较.认为弹性填料生物预处理更适用于低浊(50 NTU以下)、低氨氮(1.5 mg/L以下)原水,LT型悬浮球填料生物预处理适用于低中浊(100 NTU以下)、低中氨氮(2.5 mg/L以下)原水,YS型悬浮填料生物预处理及"SAF"滤池对低浊、中高氨氮(2.5 mg/L以上)原水有较好的适应性.最后探讨了弹性填料存在的短流、积泥,悬浮填料存在的部分填料流化不均匀,富氧的生物工艺单元内水生动物泛滥等问题. 相似文献
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Changes in nutrient levels in some Eastern European rivers in response to large-scale changes in agriculture. 总被引:3,自引:0,他引:3
P St?lnacke S M Vandsemb A Vassiljev A Grimvall G Jolankai 《Water science and technology》2004,49(3):29-36
Since the late 1980s, the use of commercial fertilisers in most Eastern European countries has decreased at an unprecedented rate. We examined the impact of this dramatic reduction in agricultural inputs on concentrations of nutrients in four rivers in Eastern Europe: the Emajogi and Ohnejogi (Estonia), the Daugava (Latvia), and the Tisza (Hungary). Time series of nitrate (NO3-N) and phosphate (PO4-P) concentrations and data on runoff were selected to represent catchments with substantial areas of agricultural land and available time series of sufficient length and frequency. The study period was 1987-1998. We detected downward trends in nitrate-N and phosphate-P in only two of the four rivers. Our results imply that the response to the extensive decrease in agricultural intensity since the late 1980s has been slow and limited in many rivers. Corresponding results in the literature are inconclusive and comprise several examples of both decreasing and non-decreasing nutrient concentrations. Our findings, along with similar data from other studies, indicate that large cuts in nutrient inputs do not necessarily induce an immediate response, particularly in medium-sized and large catchment areas. Moreover, the difference we noted between nitrogen and phosphorus suggests that factors other than reduced fertiliser application influenced the inertia of the water quality response. 相似文献
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对长江、珠江等河口及其近海水域缺氧现象与影响因素进行研究,结果表明,主要分布于长江与珠江河口及其邻近海域的缺氧现象,夏季(6—8月)达到最盛,秋冬季消失;长江口的缺氧区域主要位于30.75°N~32°N,122.5°E~123.25°E附近海域,具有南北2个缺氧中心;珠江口缺氧程度相对较轻,缺氧区域主要在广州黄埔区河段至虎门水域和伶仃洋;辽河、钱塘江、海河等河口区域也时而出现零星的缺氧现象;水体缺氧受控于多项环境要素,物理层化作用是缺氧产生的最初诱因之一,陆源污染物的分解则是重要的耗氧负荷;各河口区特征各异,潮汐、洋流、营养盐、叶绿素a等要素对缺氧区的范围、程度和持续时间影响程度不一。 相似文献
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深圳河支流新洲河属雨源型河流,因污染而采取全线截排污水整治.在上游河道内利用生物飘带技术处理低浓度污水,处理达标后,作为河流生态水源.在中游将截排污水引入自然循环方式污水处理系统,处理达标后作为河道补水.下游利用射流清淤配合利用天文大潮进行水体交换,达到消除黑臭水体,维持河道水景观的目的.介绍新洲河水环境综合整治采用的几项关键技术的设计原理及应用效果. 相似文献
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北京某学校雨水利用设计 总被引:3,自引:0,他引:3
以北京市某中学为例,介绍一种学校雨水利用的方法。根据校区水量平衡计算结果,对利用校园内汇集的雨水作为冲厕、绿化和景观用水等进行设计;采取相应的技术措施,对雨水径流的污染进行控制,保障所利用雨水的水质达到要求,并采用生态净化的方式,使学校景观水体循环起来。虽然雨水利用工程投资较高,但其社会和环境效益显著。 相似文献
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Ecological river engineering can be defined as the design and implementation of river works and river restoration works for the benefit of human society. It also guarantees the sustainable ecological functions of a river, such as its habitats and self-purification of its water. It is currently in the beginning stages in Korea, utilizing scientific knowledge on the processes of aquatic ecosystem degeneration and a methodology for solving the ecological problems in artificially altered rivers currently under development. The changes in river management and work practices in Korea may be best explained with a chronologically progressing sequence of ‘Natural’, ‘Disaster-prevention’, ‘Occupied’, ‘Park’, and ‘Close-to-nature’ rivers. Since the 1960s, the focus on river management and work has shifted from flood control only, to both flood control and riverine habitat conservation and restoration. Five research topics have been selected for this article, and the progress of each research area is briefly described with a representative picture in each topic. They are as follows: (1) flow resistance due to vegetation, (2) environmental flow, (3) floodplain vegetation modeling, (4) small dam removal, and (5) river restoration. For the future prospects of research on ecological river engineering in Korea, a necessity of further research on floodplain vegetation recruitment and succession, which can explain the so-called ‘white river’ and ‘green river’, is underlined, among others. Finally, two ongoing large research programs on river ecosystem restoration, of which are sponsored by the Government of Korea, are briefly introduced, followed by the introduction of a near-prototype experiment facility recently completed mainly for research on ecological river engineering. 相似文献
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李广杰 《水科学与工程技术》2001,(5):7-8
洋河水库是我省重点病险库之一,1998年12月实施除险加固工程。工程建设过程中在科研、设计、施工及管理等方面取得了可喜的成果。通过研究分析,因地制宜地选择了天然建筑材料,合理确定了施工方案,有效保证了施工质量,节约了工程投资。 相似文献