西江干流泥沙冲淤变化分析

应用控制水文站站年的实测水沙资源及插补，延长所得站年资料，采用输沙平衡法，河流横断面历史演变法、上下游沙量相关法进行了河床演变分析和河流泥沙冲淤变化研究，其主要结果是，珠江干流天峨－梧州4个区段中，各区段差异较大，年际之间，时段之间有冲有淤，但总体上均有淤积，其中天峨－迁江区段淤积最多，主要淤于大北，岩滩库区，未受拦河工程影响的干流河道并无明显淤积，基本保持水沙平衡。     

防洪工程系统风险分析方法探讨

 从风险分析的角度研究流域防洪体系的组成、影响因素及其风险分析方法，包括系统破坏概率和洪灾损失的估算、非工程措施对减小系统风险的影响等,并结合长江中游防洪工程的特点，探讨防洪系统的组成。研究表明：通过系统风险分析，可以将防洪工程的安全性、经济性和社会性相互结合，为防洪决策支持系统的建立服务。     

晚明无锡愚公谷考

无锡愚公谷,是晚明江南盛极一时的一座名园,却在园主去世后不久,未及入清,即为他人占据,析作多个祠堂。该园现存史料相当丰富,而现有研究的广度和深度尚难以与之匹配。本文将澄清已有研究中与园主邹迪光生平及园林文献《愚公谷乘》相关的一些误会,随后通过检阅园林、祠堂相关文献记载,对照园址现存遗迹,展开晚明时期的愚公谷布局推测复原。     

Systems dynamic model to forecast salinity load to the Colorado River due to urbanization within the Las Vegas Valley

This study evaluates the impact of urban growth in the Las Vegas Valley (LVV), Nevada, USA on salinity of the Colorado River. In the past thirty eight years the LVV population has grown from 273,288 (1970) to 1,986,146 (2008). The wastewater effluents and runoff from the valley are diverted back to the Colorado River through the Las Vegas Wash (LVW). With the growth of the valley, the salinity released from urban areas has increased the level of TDS in the wastewater effluents, ultimately increasing the TDS in the Colorado River. The increased usage of water softeners in residential and commercial locations is a major contributor of TDS in the wastewater effluents.Controlling TDS release to the Colorado River is important because of the 1944 Treaty signed between the USA and Mexico. In addition, the agriculture salinity damage cost for the Colorado River has been estimated to be more than $306 a million per year using 2004 salinity levels. With the expected growth of LVV in coming years the TDS release into Lake Mead will increase over time. For this purpose, it is important to investigate future TDS release into the Colorado in anticipation of potential TDS reducing measures to be adopted. In this research, a dynamic simulation model was developed using system dynamics modeling to carry out water and TDS mass balances over the entire LVV. The dynamic model output agreed with historic data with an average error of 2%. Forecasts revealed that conservation efforts can reduce TDS load by 16% in the year 2035 when compared to the current trend. If total population using water softeners can be limited to 10% in the year 2035, from the current 30% usage, TDS load in the LVW can be reduced by 7%.     

Evaluating the effects of climate change on the water resources for the city of Birmingham,UK

Climate change is expected to affect precipitation patterns and may therefore impact upon water resource availability. The city of Birmingham in central England receives its public water supply from a catchment in the Elan Valley, mid‐Wales. Baseline and future climate projections generated from a stochastic weather generator within the United Kingdom Climate Projections 2009 and a daily soil water balance model (WaSim) were used to determine the potential impacts of climate change on hydrologically effective rainfall (HER). Annual HER is likely to decrease from baseline conditions (> 90% likelihood that HER will be reduced), with more frequent and persistent very dry spells and increasing seasonality. It is concluded that climate change will put additional stress on water resources for the city of Birmingham so that, coupled with expected increases in demand, adaptation measures to increase supply and/or reduce demand are likely to be needed.     

Evaluation of ground energy storage assisted electric vehicle DC fast charger for demand charge reduction and providing demand response

In 2012 there was approximately 2400 electric vehicle DC Fast Charging stations sold globally. According to Pike Research (Jerram and Gartner, 2012), it is anticipated that by 2020 there will be approximately 460,000 of them installed worldwide. A typical public DC fast charger delivers a maximum power output of 50 kW which allows a typical passenger vehicle to be 80% charged in 10–15 min, compared with 6–8 h for a 6.6 kW AC level 2 charging unit. While DC fast chargers offer users the convenience of being able to rapidly charge their vehicle, the unit's high power demand has the potential to put sudden strain on the electricity network, and incur significant demand charges.Depending on the utility rate structure, a DC fast charger can experience annual demand charges of several thousand dollars. Therefore in these cases there is an opportunity to mitigate or even avoid the demand charges incurred by coupling the unit with an appropriately sized energy storage system and coordinating the way in which it integrates. This paper explores the technical and economical suitability of coupling a ground energy storage system with a DC fast charge unit for mitigation or avoidance of demand charges and lessening the impact on the local electricity network. This paper also discusses the concept of having the system participate in demand response programs in order to provide grid support and to further improve the economic suitability of an energy storage system.     

沪渝跨界遥相携手、长江首尾心声联动

长江流域港口云集,是太平洋西岸中国繁荣经济带向中西部地区延伸的经济动脉。沪渝-长江首尾两大都市区的跨界整合,不仅契合上海国际航运中心的战略定位,同时也为成渝大都市区发展带来新的机遇。本文通过从美国密西西比河流域开发理念得来的启示,阐释长江黄金水道与流域城市发展的机遇与问题。通过对成渝经济发展内生动力的思考,提出成渝区域发展规划控制的关键所在。     

浅析消费社会中消费空间的场所精神——以武汉市光谷步行街一期项目为例

该文依据"消费社会中的个体精神——新时代的社会行为特征——消费空间构成形式——消费空间场所精神"这条逻辑线索,以武汉市光谷步行街已经建成并投入使用的一期项目为例,通过实地调研与问卷等方法,研究了步行街的建筑形态、商业氛围和社会功能,分析了其在消费社会中表现出的场所精神。     

主成分分析方法在县域城镇体系空间布局规划中的应用—以广东省龙川县为例

主成分分析方法作为一种城镇体系规划手段、在合理规划城镇空间结构中发挥着积极的作用,是实现决策支持系统高效率运转的有效途径。运用主成分分析方法,可确定龙川县县域城镇体系规划中的区域主次中心,城镇经济片区、发展主轴和发轴,还可为行政区划的调整提供依据。     

That Old Thing Called Flexibility: An Interview with Robert Venturi and Denise Scott Brown

Robert Venturi and Denise Scott Brown hold an unrivalled position within architecture. Now written several decades ago, their classic books Learning from Las Vegas and Complexity and Contradiction remain unsurpassed for their ability to shock and overturn current architectural thought. Francesco Proto talks to Venturi and Scott Brown on their present thinking about iconography, transparency, spectacularisation, architectural pornography and the contemporary architectural avant-garde. Copyright © 2009 John Wiley & Sons, Ltd.