厂矿道路设计需要注意的问题

文章主要对厂矿道路设计存在的问题进行简要的分析,希望对同行今后的工作有所启示和帮助。     

基于WSR的区域排水权分配影响因素研究

为了进一步减少防洪损失、解决区域排水纠纷问题,在界定排水权内涵的基础上,研究得出排水权具有强制性、排他性、可交易性、可变性和紧迫性。利用WSR系统方法论构建了排水权分配的WSR分析框架,认为排水权的分配受物理因素、事理因素和人理因素的影响,并分析了多种因素在分配过程中的角色,进一步构建了排水权分配影响因素的指标体系。研究有利于实现排水权有效配置驱动因素的系统化、层次化梳理,为实现排水权的合理分配与防洪决策的进一步优化提供有效依据,对于保障防洪安全、实现社会公平与区域均衡发展具有重要的支撑作用。     

流域生态补偿标准的实证研究——基于九龙江流域的研究

文章就九龙江流域生态补偿的一般情况和存在的问题,基于社会公平原则、上游供给成本、水资源市场价格的三种补偿模型,测算出九龙江流域上下游之间的补偿金额,比较分析了三种补偿方法的特点。最后提出了健全流域生态补偿政策法规,完善生态补偿的财政支持机制,发挥市场在水资源生态补偿中的作用,创新生态补偿管理体制等政策建议。     

矿井采空区瓦斯抽放

Mine gas is the concomitant during the process of coal formation. Its main composition is methane, methane is colorless, odorless, tasteless, lighter than air, and relative density is 0.554. In order to reduce and eliminate threat to safety coal mine production, we use the mechanical equipment and pipelines cause negative pressure, pump the gas existing or release in the coal seam and transport it to the earth or other safe places, which is called gas drainage.     

特殊单立管(AD-jet)排水系统的应用

简要介绍了特殊单立管(AD-jet)排水系统的基本结构,探讨如何计算特殊单立管(AD-jet)排水系统的最大排水量,着重分析特殊单立管(AD-jet)排水系统的具体设计。     

公路路基设计中常见问题分析

鉴于公路路基修建中,常常会出现一些问题。为了更好的解决这些问题,文章对公路路基设计中的常见问题进行了分析,并提出了相应的处理办法。     

浅析城市雨水管网优化措施

结合笔者对珠海市雨水管网现状,对其在使用过程中存在的问题进行分析,并得出优化雨水管网的若干措施,谨供大家作参考之用。     

井下中央泵房排水系统设计

以PLC S7-300为控制核心的井下泵房排水系统,可自动启停水泵根据水位和其他参数的变化.为了更好地达到节能和水泵均匀使用,分别设计了避峰就谷、自动轮换等优化措施,具有故障检测和保护功能.利用组态软件WinCC远程监控,实时显示泵站的运行状况,进一步提高了生产效率,达到降本减耗.     

杏花煤矿各煤层抽放有效范围的探索

通过对仰角钻孔抽放有效段的观测,总结出不同煤层采后裂隙带的高度,为以后同一煤层回采的顶板高抽巷、仰角钻孔高度确定提供可靠依据。     

Estimating the economic benefits of acidic rock drainage clean up using cost shares

This paper reports the results of a stated preference study that estimates the economic value for cleaning up acid rock drainage in Colorado's Snake River watershed. In contrast to much of the existing literature, the present study emphasizes benefit estimation for three implementing projects rather than benefit estimation for general changes in water quality or large scale water quality policy. The focus on implementing projects delivers information that is specifically relevant to current decisions being faced in the watershed. While valuation questions in most stated preference studies present costs that have no relation to actual project costs, this study presents a new cost share approach. Project costs are estimated and then valuation questions present different local cost shares to subjects. This approach facilitates stated cost variation necessary for estimating the mean of the distribution of project values without resorting to experimentally designed, fictitious stated costs. In addition to estimating the mean value, which facilitates benefit cost analysis, the study also provides median value estimates, which provide insights into the political feasibility of these projects. Study results suggest that local cost shares on the order of 20%-40%, depending on the project, are politically feasible.