南水北调中线工程几点思考

本文从四个方面对南水北调中线工程进行了思考:①进行费用效益分析可以使决策更加科学化;②将水资源本身价值纳入经济分析之中实属必要;③需水区节水与调水投资效益比较十分重要;④选择合适的调水时间.对南水北调中线工程决策具有参考价值.     

新型无机高分子混凝剂聚硅硫酸铝的混凝性能

作者对新型无机高分子混凝剂聚硅硫酸铝(PASS)制备的工艺条件进行了研究，制备出性能稳定，效果良好的产品。用该产品对不同水质进行混凝试验，结果表明PASS有良好的混凝效果和广泛的适用范围。     

Inter-basin water transfers under uncertainty: Storage capacity and optimal guaranteed deliveries

This paper deals with water transfers between jurisdictions not claiming riparian rights to the same water source, and taking place through straightforward sales. Taking into account the uncertain nature of water surpluses, we investigate, within a partial equilibrium framework, the implications of a third party's provision of storing facilities upon the potential supplier's decision whether, and to what extent, it is worthwhile to guarantee a constant amount of water exports. The analysis suggests that there exists a minimum storage capacity below which the potential supplier will never find it profitable to divert a constant amount of water outside his boundaries; the greater the uncertainty about future surpluses and/or internal costs due to even occasional water shortages resulting from the water export commitment, the higher the required minimum storage capacity will be. Above this minimum, an increase in the capacity would be better for the surplus agent, but in a situation in which water surplus is expected to decrease over time, increases in storage capacity would make him willing to guarantee a smaller amount of water deliveries.This work has been carried out under the auspices of the European Science Foundation's research program Sharing fresh water resources in the Mediterranean region: An economic perspective. Previous versions have been presented at ESF workshops held at the Universities of Haifa, Padova and Crete. Financial support from MURST (funds 40% — 1992) is gratefully acknowledged. We wish to thank Nunzio Cappuccio, Haluk Akdogan, Karl Mäler, Mordechai Shechter, Naomi Zeitouni, and two anonimous referees for helpful comments. The usual disclaimer applies.     

间歇式自动冲洗水箱的原理和应用

现有公用卫生间的冲洗水箱种类虽多 ,但都存在共同的缺陷 ,结构复杂 ,易损坏 ,使用成本高 ,一旦损坏 ,随即影响到公用卫生间的环境卫生。为此设计出一种利用虹吸原理的间歇式自动冲洗水箱 ,不需人为控制 ,不需动力 ,能达到自动冲洗便坑的效果。整个结构中没有活动零件 ,也就没有易损件 ,最大的特点是不易损坏 ,从某种意义上讲 ,可以说永不损坏。安装方法、使用效果和其他形式一样 ,只有几个零件组成 ,结构比其他类型的自动冲洗水箱简单 ,应用虹吸原理可靠 ,可全为塑料制品 ,生产成本低于同类产品 ,宜于推广应用     

以招标优选电厂水处理系统方案的方法

以山东滨化集团热力公司二期项目锅炉补给水二期2x100t／h反渗透扩建工程为背景,结合锅炉补给水处理的主要工艺方案特征,基于招标博弈为前提,分析了电厂水处理系统方案优化的新途径。     

新形势下加强水利工程项目管理

针对目前水利工程项目的特点和管理状况，探讨了如何通过发展项目管理公司实现水利工程项目的专业管理，加强水利工程项目管理信息化和项目风险管理，来确保新形势下水利工程项目目标的实现。     

磁防垢除垢技术研究与应用新进展

回顾了磁防垢除垢技术的发展历程，介绍了磁防垢除垢技术的作用效果和应用情况，分析了磁防垢除垢技术研究现状和存在的问题，跟踪报道了磁防垢除垢技术研究的新进展。     

Communicating risk for issues that involve ‘uncertainty bias’: what can the Israeli case of water fluoridation teach us?

Water fluoridation is a controversial issue in public health. Despite the uncertainty regarding its efficacy and safety, health officials continue to communicate it as ‘unequivocally’ safe and effective. Our focus is on how health officials and policy-makers in Israel frame the issue of water fluoridation in terms of certainty while promoting a mandatory fluoridation policy. According to van Asselt and Vos, the uncertainty paradox describes situations in which uncertainty is acknowledged, but the role of science is framed as providing certainty. Our study is an analysis of documents and media articles emphasizing the paradoxical language used by official representatives on the controversial topic of fluoridation. A central contribution of this study is that we coin the term ‘uncertainty bias,’ in which policy-makers do exactly what they accuse laypeople of doing, framing uncertainty in biased terms. We found that in order to establish mandatory regulation, health ministry officials expressed information in an unbalanced format, promoting the topic of fluoridation by framing it in exclusively positive terms. This study does not focus on the practice of water fluoridation per se, and is not intended to decide for or against it, but rather, to explore how the debate regarding it is communicated. Understanding this particular case can shed light on how other controversial topics are transformed into health policy that is characterized in equivocal terms.     

基于主成分分析的关中—天水经济区水资源承载力评价

[目的]通过探讨关中—天水经济区水资源状况,可为经济区水资源的合理配置与经济社会的协调、可持续发展提供决策参考。[方法]根据关中—天水经济区2007~2016年相关统计资料,采用主成分分析法和构建指标体系对经济区水资源承载力从时间和空间两个角度进行综合评价。[结果](1)经济区水资源承载力得分由2007年的-0.067增加至2016年的1.877,水资源承载力与开发利用潜力呈现由大到小的变化,而水资源开发利用强度则呈逐渐增大趋势。(2)经济区各地市间水资源承载力存在显著差异,西安、咸阳两地的水资源承载力得分最高,均超过1.300,但水资源承载力和开发利用潜力最小;而杨凌、铜川两地的水资源承载力得分最低,均小于-2.250,但水资源承载力和开发利用潜力则最大。(3)经济发展水平、人口数量、水资源供需量、工农业生产用水是影响经济区水资源承载力大小的主要因素;其中,经济发展水平的贡献最大。[结论]经济区水资源承载力与开发利用潜力变小,开发利用强度增大;各地市间水资源承载力差异显著,将在一定程度上对经济区人口、经济、环境可持续发展起着明显的制约作用。为了促进经济区经济社会的健康可持续发展,应加强对水资源的管理与废水处理,合理控制经济区人口容量,提高社会节水意识,转变经济发展模式,大力推行节水型与节约型经济发展道路。     

基于熵权Topsis的淮河生态经济带水资源承载力评价

[目的]评价发展规划驱动下的水资源承载力特征,为区域发展提供科学依据。[方法]以淮河生态经济带为对象,采用熵权重的Topsis评价方法,分析淮河生态经济带水资源承载力的区域差异及其影响因素。[结果] 2015年不同市县水资源承载力综合得分介于0. 305 8～0. 698 8之间,其中盐城市最高,桐柏县最低;境内江苏、安徽、河南3省的水资源承载力分别为0. 585 2、0. 478 2、0. 524 9。[结论](1)淮河生态经济带水资源承载力具有在淮河干流上、下游承载力高,但中游偏低的空间分布特征。(2)水资源系统层面,水资源总量是承载力高低的供给侧决定性因素,是水资源承载力高低的重要基础。(3)社会系统中,用水量与用水结构是提升和优化水资源承载力的调控性因素。(4)城镇化发展与人口增加是水资源承载力高低的胁迫性因素,而经济发展水平是水资源承载力调控的重要保证。