共查询到20条相似文献,搜索用时 187 毫秒
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为解决新泰市水资源短缺、时空分布不均、用水粗放、地表水开发利用率低、水资源调配设施不完善、水网数字化智慧化水平低等问题;以节水挖潜、优化水资源配置格局、健全流域防洪减灾体系、打造生态水网为主线,以数字化、网络化、智能化调控为手段,延续并优化“一环五库、一河多支”的水网布局和结构,形成“两轴双环、三湖四库”的水网架构,实现新泰市水资源供给、防洪减灾、水系生态、智慧水利“四网融合”,充分发挥现代水网的网络化组合效益和整体效能,强化现代水网对新泰市支柱产业、重要城镇、大中型灌区、重点生态功能区、重大战略和经济社会高质量发展的支撑保障作用,引导新泰市产业结构调整、发展方式转变和经济布局优化。 相似文献
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现代水网是立足于现有水利工程架构,以全域水网为依托,以河道渠系为输水载体,运用现代治水理念,“多库串联、库河串联、水系联网,优化调度配置水资源”的水网建设思路,采用工程技术和管理手段,对现有水系进行整合与提升,使之形成集防洪、供水、生态等多功能于一体,可统筹解决水资源短缺、洪水灾害威胁以及水生态退化等问题的综合型水利工程网络体系. 相似文献
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有“贺兰山下第一村”之名的龙泉村,是宁夏石嘴山市重点打造的乡村旅游示范点。在石嘴山市、大武口区两级党委政府推动下,龙泉村近年成为远近闻名的旅游村,每年接待来自五湖四海游客17万人次,实现人均年收入4.5万元。如今,在新型电网、全电景区、绿色出行、智能民宿、煤改电取暖等电力服务工程“加持”下,龙泉村变得又美又“智慧”。 相似文献
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随着我国经济社会的不断发展,全社会用电量不断上升,对电网的可靠性、安全性和电能质量也提出越来越高的要求。由于历史原因,配网建设欠账较多,总体基础薄弱,发展落后于主网,区域、城乡之间发展不均衡,水平差异大,存在明显短板。随着电动汽车、分布式电源、微电网、储能装置的快速发展,对配电网的安全性、经济性、互动性、适应性提出越来越高的要求。在国家电网公司建设“大运行”体系、推进地调县调一体化进程背景下,建设安全智能的配网自动化系统成为当务之急,但现有配网线路大多存在着技术、设备落后等问题,自动化水平不高,难以直接建成大规模的配网自动化系统。 相似文献
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城市水网的防洪功能是城市社会经济发展的重要保障,同时,现代城市普遍面临水资源短缺问题,其防洪需求应与水资源利用相结合,提高雨洪资源利用效益。固城湖是高淳区最重要的水源地,若无闸门和泵站调控,在丰水年易受洪水威胁。通过闸门和泵站调控后,可将固城湖水位控制在13 m(50年一遇防洪标准)以内;通过水网的雨洪资源利用,在保障防洪安全的前提下,固城湖丰水年可新增供水量约4400万m^3。研究建议在未来的城市建设中进一步加强雨洪资源利用的研究,兼顾水网的防洪效益和水资源利用效益。 相似文献
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现代城市多面临水质型缺水问题,城市水系多因污染物超标排放、水系不流通导致水质较差,无法达到相应水功能区水质目标。城市水网的构建是解决区域水资源调配不均、水环境不达标的重要手段之一。以南京市高淳区固城湖、水碧桥河、石固河、官溪河为研究对象,通过构建一维、二维水动力水质耦合模型,选取COD、NH3-N作为水质指标,模拟不同水资源利用情况下研究区域内水体水质分布情况,评估河湖水网连接对水体水质的改善效果。研究表明,河湖水网健康连通及科学调度可显著改善水体水质。 相似文献
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随着经济与科技的持续发展,电力输出作为人们生活中重要的能源资源,与人们的生产生活息息相关。传统配电网规划符合当时的时代发展需求,但是在时代不断发展的过程中传统配网规划已经落后、脱节与现阶段的供电需要不相适应。在时代的发展下电力企业需要积极推动智能配电网的发展,将智能配电网技术快速融入电网规划之中满足新时代下人们的需求。因此笔者从智能配电网和智能自动化等方面出发,总结了智能配电网技术在现阶段的运用,在深入研究与探析的过程中推动电网规划的高效发展。 相似文献
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流域综合治理是当前环境可持续发展的热点问题。近年来,我国经济的快速发展带动了农村各项产业的发展,但同时也带来一系列的流域面源污染问题。探索中国流域水污染治理新模式,找到解决流域农业面源污染新路径迫在眉睫。国家在2012年底提出了“美丽乡村”建设战略,给乡村建设带来了新的机遇,也对乡村自然环境的改善带来积极的推动作用。以福建省厦门市海沧区过芸溪流域为研究案例,基于该流域的水质监测数据进行分析,讨论该流域“美丽乡村”建设对水质改善,尤其是改善流域农业面源污染状况方面所起的积极作用,分析“美丽乡村”建设与流域综合治理有效整合的关系,探讨其结合的可行性与保障措施。研究认为,“美丽乡村”建设可以“百姓富,生态美”为总体原则,变流域周边的生态环境资源为发展之本,在保护流域自然生态环境可持续发展的同时,推进流域综合治理、村民生活生产水平的提高。 相似文献
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《Agricultural Water Management》2001,49(2):131-151
The term ‘virtual water’ has been used previously to describe the volume of water embodied in food crops that are traded internationally. This paper describes the economic dimension of the ‘virtual water’ concept as an application of comparative advantage, with particular emphasis on water as the key factor of production. The paper also extends the discussion of ‘virtual water’ by describing a nation’s goals regarding food security within a broader framework that includes other objectives such as providing national security, promoting economic growth, and improving the quality of life for citizens. The analysis suggests that land, labor, and capital must also be considered when evaluating a nation’s production and trade opportunities. In countries where one or more of those resources is limiting, focus on ‘virtual water’ alone will not be sufficient to determine optimal policies for maximizing the social net benefits from limited water resources. In countries where labor is relatively abundant, public policies that promote labor-intensive crop production and processing activities may be desirable. The role of ‘virtual water’ within a broader policy framework is demonstrated using crop production and international trade data from Egypt, where substantial amounts of ‘virtual water’ and ‘virtual land’ are embodied in wheat and maize imports. Policies that promote increased exports of labor-intensive crops will improve rural incomes and enhance food security. 相似文献
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“海绵校园”既是海绵城市在校园尺度的示范,又是海绵城市的有机组成部分。江苏城乡建设职业学院基于绿色校园建设基础,对校园海绵基底现状进行分析,采用雨水管理“四步”方案,通过“渗”、“滞”、“蓄”、“净”、“用”、“排”等技术措施,实现年径流总量控制率75%的目标。项目具有显著的环境效益、经济效益和社会效益,为运用低影响开发技术打造海绵校园提供借鉴和指导。 相似文献
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【目的】探讨宁夏地区2008—2017年作物生产水足迹及其变化趋势为调整宁夏地区农业用水结构以改善水资源短缺问题提供理论依据。【方法】基于水足迹理论,本文利用气象和农业有关数据,对宁夏回族自治区2008—2017年主要农作物的生产水足迹进行了量化处理,并结合气象因素与作物产量,对其进行了时空分布及变化趋势分析。【结果】①宁夏地区10年研究期间各作物的生产水足迹总体上呈减小趋势,在5种主要农作物中,大豆的平均综合生产水足迹最大,为4.51 m^3/kg,玉米的平均综合生产水足迹最小,为0.91 m3/kg;②各作物蓝绿水足迹比例最高的是稻谷,为5∶1,最低的是大豆,为1.4∶1;③10年研究期各地区综合作物生产水足迹大小排序为:吴忠市(15.58m^3/kg)>中卫市(13.71m^3/kg)>石嘴山市(12.77m^3/kg)>银川市(9.46m^3/kg)>固原市(8.21m^3/kg);④各地区蓝绿水足迹比例从南到北依次递增,固原市最小为1.2∶1,石嘴山市最大为5∶1。【结论】在水资源十分缺乏的宁夏地区,需根据各作物耗水规律适当调整种植结构、灌溉模式等减少农业用水量以缓解水资源短缺问题。 相似文献
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《Agricultural Water Management》2004,69(2):135-153
The case study describes large-scale environmental change related to, and recent responses associated with, growing water scarcity in the Usangu Plains, a catchment of the Great Ruaha River in south-west Tanzania. The analysis uses outputs from two recent projects to critically examine various theories of environmental change and the ‘fit’ of new river basin management strategies to the problems found, arguing that various perspectives are worryingly at odds with each other. We find that the investigators of the two projects presented a reasonable and sufficient case of the causes of water scarcity. Yet despite efforts to disseminate scientific findings, different stakeholder groups did not agree with this case. This, we believe, was due to three combined factors; firstly highly entrenched views existed that were also based on quasi-scientific reasoning; secondly, the projects’ deliberations to date, in acknowledging their own uncertainty, were not assertive enough in ascribing causation to the various processes of change; thirdly, policy-uptake was not sufficiently managed by the scientists involved. We conclude that this complexity of the science–policy interface is a feature of integrated water resources management (IWRM) and that the norms of scientific uncertainty in the face of competing theories (held by their protagonists with greater certainty) obliges scientists to take a more active role in sensitively managing the advice-to-policy process in order to improve management of water within river basins. Thus, the paper argues, the nature of integrated water resources management is one of ‘action research’ to move towards an improved understanding of change, and of ‘action policy-advising’ to draw policy-makers into a cycle of considered decision-making. 相似文献
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甬优9号是新一代籼粳三系杂交稻品种,在福建省永安市种植表现为株型适中、群体整齐、结实率高、适应性好及抗病抗倒伏性强等特点。总结了2014年甬优9号在永安的种植表现及高产栽培技术,为今后进一步推广该品种打下基础。 相似文献
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农村土地利用数据库更新是国土资源“一张图”建设的一项重要内容,也是实现国土资源动态管理的主要方法。该文以MAPGIS农村土地调查管理系统为平台,以承德市双滦区为例,着重探讨了农村土地利用数据库更新的流程和方法,并对数据库更新过程中应重点注意的问题和解决方法进行了阐述。 相似文献
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随着全球水资源的不断匮乏,节水形势越来越严峻。传统的灌溉技术缺乏对水资源的合理分配,导致水资源利用率十分低下,浪费现象较为严重,且不合理的灌溉模式对农作物生长也产生了一定的影响。为提高水资源利用率,保证农作物时刻具有所需的水分,基于SQL数据库技术,完成了智能灌溉专家系统的优化设计。通过分析专家系统的基本结构,建立了SQL数据库的E-R模型,并对智能灌溉专家系统的典型数据表(用户信息表、机具信息表、灌溉标准信息表和水泵信息表)进行优化设计。最后,对灌溉系统的实际灌溉情况进行试验,结果表明:基于SQL的智能灌溉专家系统可以根据农作物的生长所需合理分配水资源,使农作物具有适宜的水分环境,对大幅提高农作物产量和质量具有一定的实践意义。 相似文献
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《Agricultural Systems》1998,56(2):185-207
An expert system was developed with the aim of improving decision-making by grape growers in their management of Botrytis cinerea. Knowledge was obtained from the refereed literature on B. cinerea and also from the more general literature on plant pathology and viticulture. The decision to apply a fungicide was based on estimated disease risk, economic threshold, and duration of protective cover provided by fungicides. Up to six factors were used to estimate disease risk. These were ‘Growth Stage’, ‘Conidial Infection’, ‘Mycelial Infection’, ‘Injury’, ‘Symptoms’ and ‘Cultivar Susceptibility’. The economic threshold depended on whether grapes were destined for premium or bulk wine, and length of protective cover of a fungicide was estimated from use patterns advocated on product labels. The knowledge was structured into a dependency network of objects, with the object determining the need to apply a fungicide at the apex of the network. The knowledge was then represented in the knowledge base of the expert system in a series of IF-THEN rules. 相似文献