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“数字黄河”工程规划概要 总被引:3,自引:0,他引:3
《中国水利》2003,(3):20-23
“数字黄河”工程是一项复杂的、巨大的、长期的系统工程。“数字黄河”工程规划的主要内容包括建设必要性、需求分析、规划目标、业务应用系统、基础设施、应用服务平台等。业务应用系统主要包括防汛减灾、水量调度、水资源保护、水土保持、工程建设与管理、电子政务等,基础设施主要包括数据采集、数据传输、数据存储与管理等系统,应用服务平台包括应用服务和资源管理。 相似文献
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水利部黄河水利委员会 《中国水利》2003,(5):20-23
“数字黄河”工程是一项复杂的、巨大的、长期的系统工程。“数字黄河”工程规划的主要内容包括建设必要性、需求分析、规划目标、业务应用系统、基础设施、应用服务平台等。业务应用系统主要包括防汛减灾、水量调度、水资源保护、水土保持、工程建设与管理、电子政务等,基础设施主要包括数据采集、数据传输、数据存储与管理等系统,应用服务平台包括应用服务和资源管理。 相似文献
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"数字黄河"工程建设实践与效果 总被引:2,自引:1,他引:1
“数字黄河”旨在集成利用信息技术,构建面向黄河流域及其相关区域的自然、经济、社会等的数字集成平台,并在此基础上通过建立业务应用系统及数学模型系统形成模拟分析和研究黄河问题的虚拟环境。目前,“数字黄河”一期工程已经建成.并开始发挥效益。 相似文献
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为方便广大读者了解全国水利信息化工作,了解信息技术在水利系统中应用的相关知识,我们特对水利信息化专家、河海大学计算机及信息工程学院艾萍博士进行了专访。2000年以来,艾萍博士一直从事水利信息化及其相关技术方面的研究,曾参加了《江苏省水利信息化规划纲要》编制、《浙江省水利信息化规划》编制、《“数字黄河”工程规划》编制、《全国水利信息化规划》编制、国家水文信息服务系统设计、《国家水利数据中心项目建议书》编制、《“数字黄河”工程实施计划》编制、“数字黄河”工程应用服务平台总体设计、《水利信息化标准指南(一)》编制等项工作。目前,他正在参加国家防汛抗旱指挥系统一期工程初步设计、“数字黄河”工程应用服务平台实验系统研发、《国家电子政务工程——“金水工程”项目建议书》编制,负责《水利电子地图产品模式标准》的编制,并在软件工程和智能信息处理等专业领域从事教学与研究工作。 相似文献
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建设“数字黄河”工程 总被引:5,自引:3,他引:2
“数字黄河”工程是借助全数字摄影测量,遥测,遥感(RS)、地理信息系统(GIS),全球定位系统(GPS)等现代化手段及传统手段采集基础数据,通过微波,超短波,光缆,卫星等快捷传输方式,对黄河流域及其相关地区的自然,经济,社会等要素构建一体化的数字集成平台和虚拟环境。在这一平台和环境中,以功能强大的系统软件与数学模型对黄河治理开发和管理的各种方案进行模拟,分析和研究,并在可视化的条件下提供决策支持,增强决策的科学性和预见性。建设“数字黄河”工程,是实现黄河治理开发和管理现代化的关键途径,包括数据采集,数据传输,数据存储及处理,数学模拟和决策支持5个环节,以及防汛减灾,水量调度,水质监控,水土流失治理与监测,水利工程运行与管理,电子政务,黄河网等7方面的内容。“数字黄河”工程的基础平台包括通信网络,计算机网络和基础数据库。要保证“数字黄河”工程的顺利实施,必须统一组织,做好规划,确保投入,应用牵引。 相似文献
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“数字黄河”是“原型黄河”的虚拟对照体,是借助信息技术等现代化手段采集基础数据,对全流域及相关地区的自然、经济、社会等要素构建一体化的数字集成平台和虚拟环境。“数字黄河”工程从2001年开始建设,2003年4月水利部正式批复了“数字黄河”规划。在总体规划下,黄委明确了“数字黄河”工程的近期目标,并对各个组成部分进行科学全面的总体设计,明确了工程建设方法与步骤。目前,“数字黄河”工程蓝图绘就,框架体系基本建成,六大业务应用系统建设取得可喜的进展,在黄河治理开发中已初见成效。 相似文献
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根据冗各电站地下厂房开挖支护的施工顺序,以隐式杆单元模拟锚杆,以壳单元模拟混凝土喷层,采用三维非线性有限元技术,对洞室群的开挖支护动态过程进行了模拟计算。通过三维非线性有限元计算分析得到:洞室群动态开挖过程中围岩应力变形的分布规律,围岩塑性区的发展规律,锚杆受力变化情况。计算结果表明:整个开挖过程中,洞周围岩位移变化规律正常,量值较小,塑性区主要分布在洞室周边,围岩稳定性较好;但在洞室交叉口处围岩的变形较大,出现较大范围的塑性区,在此基础上提出了支护措施优化方案,并对优化方案的效果进行了评价。 相似文献
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The relocation of unionacean mussels is commonly used as a conservation and management tool in large rivers and streams. Relocation has been used to recolonize areas where mussel populations have been eliminated by prior pollution events, to remove mussels from construction zones and to re-establish populations of endangered species. More recently, relocation has been used to protect native freshwater mussels from colonization by the exotic zebra mussel Dreissena polymorpha. We conducted a literature review of mussel relocations and evaluated their relative success as a conservation and management strategy. We found that 43% of all relocations were conducted because of construction projects that were forced to comply with the Endangered Species Act 1973 and that only 16% were monitored for five or more consecutive years. Most (43%) relocation projects were conducted from July to September, presumably a period when reproductive stress is relatively low for most species and the metabolic rate is sufficient for reburrowing in the substrate. The mortality of relocated mussels was unreported in 27% of projects; reported mortality varied widely among projects and species and was difficult to assess. The mean mortality of relocated mussels was 49% based on an average recovery rate of 43%. There is little guidance on the methods for relocation or for monitoring the subsequent long-term status of relocated mussels. Based on this evaluation, research is needed to develop criteria for selecting a suitable relocation site and to establish appropriate methods and guidelines for conducting relocation projects. 相似文献
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In the lower River Murray, Australia, populations of gastropods have declined markedly over the past 40 years. Of the native fauna of about 18 species, only the ancylid Ferrissia petterdi remains common (but in patches), and another five species feature in sporadic local resurgences. Until recently the viviparid Notopala was thought to be extinct. The introduced physid Physa acuta is widespread, but in low numbers. The decline probably is associated with flow regulation, high turbidity and the introduction of common carp. Snail populations have persisted, however, in irrigation pipelines fed from the river, where they periodically cause blockages. This paper reports the discovery of the only known populaion of Notopala hanleyi in a pipeline where the inner wall accumulates microbial and other organic matter, providing high quality food for snails. In the Murray before regulation most of the periphytic biomass was probably microbial, as fluctuating water levels would have maintained littoral communities in a highly productive, early state of succession his postulated that, by stabilizing seasonal water levels, regulation has promoted the production of filamentous green algae, an inferior food source, and so displaced snail populations from the open aquatic environment. 相似文献
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V. K. Konovalov O. V. Yashkin V. V. Ermakov 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2008,42(2):105-109
A system for removal and pneumatic transport of fly ash is examined, in which air pulses act on batches (pistons) of ash formed
in a duct. Studies are made of the effect of several physical parameters on the force required to displace a piston of ash
and these serve as a basis for choosing a system for removal and pneumatic transport of ash simultaneously from several hoppers
of an electric precipitator. This makes it possible to separate the ash particles according to size without introducing additional
components. Formulas are given for calculating the structural and dynamic parameters of this system and measurements of indirect
dynamic parameters are used to calculate the input-output characteristics of the system. In order to optimize the system,
configurations for summing several ducts into a single transport duct for pneumatic ash transport are proposed. Some variants
of dry ash utilization and the advantages of producing of size-separated particles are considered.
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Translated from élektricheskie Stantsii, No. 2, pp. 26–30 (2008). 相似文献
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Peter B. Bayley 《河流研究与利用》1991,6(2):75-86
The ‘flood pulse advantage’ is the amount by which fish yield per unit mean water area is increased by a natural, predictable flood pulse. Evidence for this increase is presented from tropical and temperate fisheries. It is argued that increasing multispecies fish yield by restoring the natural hydrological regime is consistent with increasing production of other trophic levels and with restoration from ecological and aesthetic viewpoints. When applied to a river-floodplain system, this restoration would provide a large, self-sustaining potential for recreation, commercial exploitation, and flood control. An interim ‘natural flood pulse’ restoration approach is proposed for systems modified for navigation. This approach approximates the natural hydrological regime in a river reach and is intended as a first step in the long process of restoring the watershed. 相似文献
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简述天湖水电站投运以来各种故障的表现形式,分析其原因,提出了相应的处理方法及措施,并对合理利用国内外设备提出建议。 相似文献