浅谈住宅小区地下车库建设的利弊

我国以密集型多层或高层为主的住宅小区,随着私家车的日益增多,解决问题的办法大多是建地下车库。随之而来的问题是地下可能被“掏空”,而且地下建筑造价高、技术难度大,只为多建有限面积的地下空间,付出的代价可谓太多,地下工程的不可逆性又会给将来改造和土地再次利用带来困难。其他的选择是建机械式立体车库,政府主管部门制定相关政策限制小区内车位数量,鼓励兴建公共停车场,发展公共交通,更符合“以人为本”的指导思想。     

Stormwater runoff quality and quantity from asphalt, paver, and crushed stone driveways in Connecticut

This study compared the quality and quantity of stormwater runoff from replicated asphalt, permeable paver, and crushed-stone driveways. Rainfall was measured on-site and runoff was recorded using tipping buckets. Flow-weighted composite runoff samples were analyzed weekly for total suspended solids, total Kjeldahl nitrogen, nitrate-nitrogen, ammonia-nitrogen, total phosphorus (TP), zinc, lead, and copper. Infiltration rate was determined on each driveway annually. Repeated measures analysis of variance indicated that stormwater runoff was significantly different among each driveway type; the order of decreasing runoff was asphalt> paver> stone. Average infiltration rates were 0, 11.2 and 9.0 cm/h for asphalt, paver, and crushed stone driveways, respectively. Both paver and crushed stone driveways reduced stormwater runoff as compared to asphalt driveways. Runoff from paver driveways contained significantly lower concentrations of all pollutants measured than runoff from asphalt driveways. However, runoff from crushed stone driveways was similar in concentrations to runoff from asphalt driveways, except for TP concentrations, which were lower in runoff from crushed stone driveways than runoff from asphalt driveways. The mass export of measured pollutants followed the relative differences in stormwater runoff, rather than differences in concentrations.     

武汉市汉阳区的暴雨径流污染特征

为研究合流制城区的暴雨径流污染特征，在武汉市汉阳区的4个合流制集水区布置了监测断面，对暴雨径流过程中的水质、水量进行了连续监测。结果表明：污染物浓度的峰值一般提前或同步于径流量的峰值，初期径流污染较重；采用污染物浓度变异指数可以反映不同集水区暴雨径流污染的差异性；汉阳城区暴雨径流的SS、COD、TP和TN平均浓度分别为601．1、299．2、0．88和12．26mg／L，同珠海市相比，其暴雨径流污染水平明显要高。     

关于控制性详细规划整合的思考

以重庆市江北区中心地块控制性详细规划整合为例,提出控制性详细规划整合问题出现的诱因,控制性详细规划整合的基础、依据,并总结出控制性详细规划整合工作的研究重点,说明控制性详细规划整合在城市建设中起到的作用。     

Learning from the extreme River Tyne flood in January 2005

Extreme floods often demonstrate unanticipated characteristics that pose problems for management and response. The floods on the Tyne and Eden in January 2005 provided numerous examples of such unexpected response. This paper describes characteristics of storm rainfall and runoff generation on the River Tyne catchment, flood effects and damage. Unusual aspects of hydrological behaviour are highlighted as a basis for assessing what lessons can be learned for flood risk management. These include problems associated with coincidence of extreme wind speeds and rainfall, the retarding influence of floodplain storage on flood wave travel time in extreme flows, the influence of critical storm duration on the severity of the resulting flood on headwaters and main river, and the variety of mechanisms of flood occurrence. The occurrence of such an extreme flood provides the opportunity to validate and enhance the review process of the Environment Agency's flood zone maps.     

复合潜流人工湿地处理城市地表径流研究

以武汉市桃花岛塘和复合潜流人工湿地组合生态处理系统为研究对象，考察了对城市地表径流的处理效果。结果表明，塘和复合潜流人工湿地组合生态系统可以有效净化城市地表径流，对各污染物的去除率：COD为84．0％～85．4％、TP为89．6％～91．8％、TN为92．2％～94．4％、SS为95．8％-97．1％，其中复合潜流人工湿地对COD、TP、TN、SS的去除率分别为69、0％～73．1％、82．6％～86．6％、89．0％～90．4％、64．7％～69．2％，除氮效果独特。在无雨期该生态系统可用于净化湖水，实现了削减污染和保持系统稳定的双重功能，同时还可补给养鱼塘用水。     

低洼小区雨水排水的探讨

随着城市建设的大规模开展,大型低洼小区排水成为经常遇到的难题。该文通过工程实例,分析如何利用挡水设施、地面径流控制措施、现场外径流控制措施等方法,解决大型低洼小区雨水排水问题,以期用最低的投资来获取最大的排水安全性。     

城市雨水径流模型研究

根据城市雨水径流的特点，把径流分为地表径流和管内汇流两个阶段。介绍了降雨，扣损，净雨过程线，雨水口流量过程线和管网汇流的计算方法，为雨水管网的设计，模拟和工况分析提供了有效的工具。     

当代大学校园建筑容量的合理调控

针对生师比逐年提高和教工住宅社会化转变等现实状况,将教工住宅用地从校园建设总用地中扣除,重新计算和分析了校园建筑容积率,建设性地提出在大学校园建设中应适当提高校园建筑的容积率,并以0.55作为定额上限的参考值。     

文博大厦空调设计

简要介绍了文博大厦工程概况以及对空调方案的比选,并对文博大厦采用可变冷媒流量空调系统进行了介绍.结合本工程实际,对以后变冷媒流量空调系统设计应注意的问题提出了建议和看法.