共查询到19条相似文献,搜索用时 406 毫秒
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河道堤防工程管理现代化不仅是适应经济社会现代化和河道堤防现代化的客观要求,也是建立和完善现代水利工程管理体系、实现水利现代化的重要组成部分。基于河道堤防工程管理现代化的内涵和特征,依据先进性、系统性、可比性、代表性、可操作性、导向性等原则,构建了河道堤防工程管理现代化评价指标体系,包括9个一级指标和34个二级指标,并将层次分析法和熵权法组合来确定各层指标权重,以避免和消除主观赋权法和客观赋权法的缺陷,进而采用物元分析法构建河道堤防工程管理现代化评价模型。对常熟市江堤工程管理现代化的评价结果表明,此评价模型结构简单,可靠性、实用性强,评价结果符合客观情况。 相似文献
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针对城市河道水质监测技术现状,建立了一种面向智慧水务的城市河道水质实时监测系统,以自主研发的SFM600WS浮标水质分析仪自动、连续、准确地监测所研究河道水体水质多参数,以专门的无线数据传输模块实现所采集数据的稳定、远程自动传输,在所建立的流式大数据平台上实现高效率的水质数据查询和特征提取。同时,构建了通用的水动力水质耦合模型接口,用来模拟所研究河道整体的污染物分布状况。实际应用结果表明,该系统可达到实时、全面监测整个河道水质的目的,实现了智慧水务中水务事件的智慧感知。 相似文献
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城区河道产流特性分析 总被引:1,自引:1,他引:0
以昆明城区及邻近山区河流为例,分析了天然、城区河道的降雨径流关系.结果表明,同暴雨条件下城区河道径流系数较天然河道平均增大58.8%,且同为城区河流,径流深与不透水面所占比重有关.该分析可供城市河道洪水研究借鉴参考. 相似文献
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Cascade hydropower exploitation (CHE) has become an inevitable trend of global hydropower development in the future, and also China’s basic policy on hydropower exploitation. Most of works so far focus on the accumulated effects caused by CHE, but the systematic assessment of the security scale of CHE as well as section management according to different rivers and different sections of one same river is seriously lacking. This article selectively analyses the process, section management linkage, section control scale of CHE based on existing literatures review and cases experiment in Southwestern China. Remarked conclusions include: (1) The river health is the central issue for sustainable exploitation of the river and integrated management of the river basin, instream flow requirements in different sections of the river should be met first; it is the key scientific basis for CHE to determine the maximum scale and reference standard of hydropower exploitation in each river section according to the minimum ecological flow. (2) Three management issues of CHE should be emphasized: to integrate special cascade hydropower planning with river section planning, under integrated planning of river basin; to regulate the existing management system for CHE; to balance stakeholder’s interest and benefit in exploitation decision-making. (3) The security scale of CHE on different rivers and different sections of one same river should be measured by three reference scales, i.e., the critical scale of CHE based on the minimum ecological flow, the critical scale of CHE based on per unit river fall and per unit flow, and by combinations of the three reference scales. 相似文献
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针对基于地形图高程点生成DEM法提取的模拟河网同实际河网存在着差异甚至错误的问题,分析了TIN数据范围、高程点密度及DEM采样精度三个影响因素对水系提取精度的影响、影响程度大小、原因及修正方法。以深圳坪山河为例,通过设置不同的情景提取模拟河网,并同实际水系进行对比,定性评价各因素的影响、误差来源及修正方法。结果表明,TIN数据范围影响着整体河流的准确性,高程点密度及DEM采样精度影响着局部河流的准确性;TIN数据范围的影响来源于DEM插值高程的异常,可通过裁剪数据边界加以消除;高程点密度和DEM采样精度的影响来源于高程的局部高估,部分高估区域可通过对比不同情景下的模拟河网不一致区域得出,其他部分高估区域则需借助额外的水系信息加以判别。 相似文献
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数字流域技术与流域水环境综合管理 总被引:1,自引:1,他引:0
概括性地叙述了数字流域技术在流域水环境综合管理中的应用前景;介绍了数字流域技术在水环境监测、水环境评价及流域梯级开发决策支持系统的应用。 相似文献
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