Use of inert C&D materials for seawall foundation: A field-scale pilot test

The generation rate of construction and demolition (C&D) materials in Hong Kong has well exceeded the demand rate. An innovative solution has been developed by the Hong Kong Special Administrative Region Government to use the inert portion of C&D materials, denoted as public fill, for seawall foundation construction. A field-scale pilot test has been conducted to evaluate the constructability and engineering performance of the foundation so as to establish the viability of the solution. Details of the pilot test and results of the performance evaluation are presented in this paper. More importantly, the viability of an innovation solution to achieve effective allocation of sand fill resources, and conservation and recycling of inert C&D materials has been established.     

淮北市旅游资源特征、功能分区及线路布局

发展旅游业有利于优化煤炭资源面临枯竭的淮北市的经济结构,广开就业门路,美化城市环境,塑造城市新形象.通过对淮北市旅游资源总体特征的评价分析,设计出该市旅游发展的功能分区以及旅游线路布局,为淮北市旅游业的深度开发和合理利用提供科学依据.     

中小城市(城镇)垃圾转运系统优化设计研究

我国城镇垃圾处理与处置技术的发展，不仅为垃圾转运技术的研究提供了机遇，而且提出了更高的要求。合理有效的资源配置在很大程度上决定了垃圾转运的效率，本文结合典型城镇垃圾转运系统的需求及特点，将系统工程的理论与方法具体化，运用模块化设计理念与方法进行了城镇垃圾转运系统及转运站的优化设计研究。     

Smart and eco-cities in India and China

ABSTRACT

Smart and eco-cities have become important notions for thinking about urban futures. This article contributes to these ongoing debates about smart and eco-urbanism by focussing on recent urbanisation initiatives in Asia. Our study of India’s Smart Cities Mission launched under the administration of Narendra Modi and China’s All-In-One eco-cities project initiated by Xi Jinpin unfolds in two corresponding narratives. Roy and Ong’s [2011. Worlding Cities: Asian Experiments and the Art of Being Global. Oxford: Wiley-Blackwell] “worlding cities” serves as the theoretical backdrop of our analysis. Based on a careful review of a diverse set of academic literature, policy and other sources we identify five process-dimensions for analysing the respective urban approaches. We show how the specific features of China’s and India’s urban focus, organisation, implementation, governance and embedding manifest both nations’ approaches to smart and eco-urbanism. We argue that India’s Smart City Mission and China’s All-in-One project are firmly anchored in broader agendas of change that are set out to transform the nation and extend into time. The Indian Smart City Mission is part of a broader ambition to transform the nation enabling her “smart incarnation” in modernity. Smart technologies are seen as the key drivers of change. In China the framework of ecological civilisation continues a 5000-year historical tradition of civilisation excellence. By explicitly linking eco-urbanism to the framework, eco-cities become a means to enact ecological civilisation on the (urban) ground.     

我国城镇可持续发展实验区建设的理论与实践

可持续发展综合实验区是我国实施可持续发展战略的重要行动。本文在分析、总结我国城镇可持续发展实验区实践的基础上,提出了建设城镇可持续发展实验区的基本思路     

Promoting community economic development: an assessment of an experimental scheme in cleveland

Traditional economic planning policies do not, largely, benefit residents of run‐down inner city neighbourhoods. Planners have therefore begun to look at other ways to improve the economic well‐being of unemployed people in such areas. One such initiative has been the location of Community Employment Development Officers in economically depressed areas by Cleveland County Council — one of Britain's unemployment blackspots. Their remit is to encourage and initiate action to create jobs and this paper looks at the experiment, drawing out some of the lessons.     

RECLAIMED WASTE WATER FOR GROUNDWATER RECHARGE1

ABSTRACT. The Orange County Water District has conducted studies in waste water reclamation and groundwater recharge since 1965. The work has been done in three phases: (1) Study in both laboratory and pilot-scale units on the feasibility of reclaiming trickling filter effluent for injection through wells into confined aquifers; (2) long-term injection study to determine the fate of injected reclaimed water and to observe the performance of a multi-casing injection well; (3) testing alternative treatment methods in a 25,000 gpd pilot plant to solve the water quality problems which developed during the injection study. The reclaimed trickling filter effluent was found to be injectable and did not cause excessive well clogging. The multi-casing injection wells performed very satisfactorily. The reclaimed water would be acceptable for domestic use after travel through 500 feet of a confined aquifer in that bacteria, virus and toxic material were consistently absent. However, the odor and taste which persisted in the injected reclaimed water and the high concentration of dissolved inorganics are undesirable characteristics. Methods to eliminate the odor are being tested at the present time. A cooperative project with the Office of Saline Water is under way to develop a source of desalted seawater to blend with reclaimed waste water.     

煤炭城市大气污染特征与防治对策

以煤炭城市平顶山市为例，分析大气污染的来源，阐明大气污染的特征，提出煤炭城市大气污染防治对策，促进煤炭城市大气环境质量的改善。     

Evaluating the influence of air pollution on solar radiation observations over the coastal region of Alicante (Southeastern Spain)

The present study evaluates ground-based downward surface shortwave radiation (R_s) over the coastal region of Alicante (Southeastern Spain). Hourly measurements collected over the eleven-year period 2010-2020 are used. Two weather stations located over the region capital, Alicante, have been selected as representative of urban and suburban typologies. Two additional weather stations far from the city have been selected representing rural typologies. R_s is significantly reduced over the urban station during the morning hours within the winter season compared to the observations recorded over the suburban and rural stations, with a global mean difference of -81 and -120 W/m² at 10 LT, respectively. However, no significant differences are obtained during the midday sun, with a global mean difference of -20 W/m² between the urban and rural stations. With the aim of explaining these differences, the current paper investigates the relationship between R_s and different air pollutants: NO_x, SO₂, and fine particulate matter (PM_2.5 and PM₁₀) as well as the wind field measured at the urban and suburban stations. The results found in this work point towards a close relationship between R_s and NO_x concentrations annual cycles, which are also influenced by the prevailing wind circulations observed over the study area. A global mean NO_x concentration of 107 µg/m³ is observed over the urban station at 10 LT during the winter season. In contrast, these high concentrations are significantly reduced over the suburban station, with global mean value of 40 µg/m³ at 10 LT, for this period of the year.     

两段活性污泥法处理味精废水的中试研究

采用两段活性污泥法处理味精废水 ,试验规模 0 5m3/h ,当进水CODCr浓度 16 80～ 70 30mg/L,NH3 N浓度 2 0 6～ 1999mg/L时 ,经石灰中和 ,空气吹脱对离交废水的预处理后 ,出水CODCr<10 0 0mg/L。试验中 ,兼氧池和一段好氧池污泥浓度保持在 6 0 0 0～ 80 0 0mg/L之间 ,二段好氧池保持在 40 0 0～ 6 0 0 0mg/L之间。生物处理总停留时间 5 0h。在离交废水预处理中 ,pH中和至 9 5～ 10 ,鼓气量在 10 0m3/h左右 ,水温加至 5 5℃左右 ,经 8h ,可将原水NH3 N从12 0 0 0mg/L左右 ,脱除 6 5 %以上 ,出水氨氮可达 40 0 0mg/L左右。