FLUSHING CHARACTERISTICS OF A MISSISSIPPI DEAD-END CANAL SYSTEM1

ABSTRACT: A study of residential canal system on the Mississippi Gulf Coast and adjacent natural water bodies was conducted to determine the relationship in flushing characteristics between man-made and natural systems. The comparison was based on measurements of temperature, salinity, conductivity, coliform, pH, transparency, biological oxidation demand, dissolved oxygen, bathymetry, tides, water velocity, and Rhodamine dye concentrations. The results indicate that coliform bacteria increase with increasing distance of stations from St. Louis Bay and dissolved oxygen decreases in a similar manner. Biological oxidation demand was low at all stations; showing no differences between natural and man-made systems. The canal system Studied was shallower than adjacent water bodies and water velocities in the canal system are a function of tidal amplitude while velocities in the river are affected by both tides and runoff. The other parameters measured show little or no differences between natural and man-made systems, but reflect overall seasonal changes. Flushing rates between the residential canal systems and an adjacent natural system are equivalent on the basis of decline in dye concentrations measured over a five-day period.     

Smart city data architecture for energy prosumption in municipalities: concepts,requirements, and future directions

ABSTRACT

Big data is gaining visibility and importance, and its use is attaining higher levels of influence within municipalities. Due to this proliferation smart cities are posed to deploy architectures toward managing energy for Electric Vehicles (EV) and orchestrate the production, consumption, and distributing of energy from renewable sources such as solar, wind etc. in communities also known as prosumption. In smart city domain, Enterprise Architecture (EA) can be employed to facilitate alignment between municipality goals and the direction of the city in relation to Information Technology (IT) that supports stakeholders within the city. Hence, the alignment between IT and goals of the city is a critical process to support the continued growth and improvement of city services and energy sustainability. However, despite several research effort focused on data architecture in smart city, there have been few studies aimed at exploring how EA can be applied in smart cities to support residential buildings and EV for energy prosumption in municipalities. Therefore, this study conducts an extensive review and develops an architecture that can be employed in smart city domain based on big data management for energy prosumption in residential buildings and EV. Furthermore, secondary data was employed to present a case study to show the applications of the developed architecture in promoting energy prosumption. Findings suggest that the architecture provides interoperable open real-time, online, and historical data in facilitating energy prosumption. Respectively, this study offers exchange of data for sharing energy resources and provides insights to improve energy prosumption services.     

RESIDENTIAL WATER DEMAND IN METRO MANILA1

ABSTRACT: An econometric demand function is estimated for residential water use in Metropolitan Manila. Regression results using annual time series data from 1970 to 1981 show that residential water consumption responds to changes in economic variables. Residential demand showed an income (household) elasticity of 0.542 and a combined price elasticity of -0.287. Implications for planning and management are discussed.     

SYSTEMS FOR RAINFALL AND RUNOFF USE,TUCSON, ARIZONA1

Rainfall and runoff in the Tucson, Arizona, urban area can be used to augment residential and municipal water supplies. Residential rainfall-harvesting systems include a catchment surface, collection and concentration components, separation and treatment units, storage capacity and distribution capability. A system to control runoff can divert water from urban washes for use in parks or other landscaped areas or can be used to enhance recharge to groundwater reservoirs. A reduction in flood hazards or peaks is a concurrent benefit of controlling and diverting runoff.     

再生资源回收企业在社区的营销策略

社区是再生资源回收企业开展回收业务的重要场所,回收企业在社区的宣传推广对于提升企业知名度、树立企业品牌、提高业务量具有重要作用。对再生资源回收企业在社区进行营销宣传的必要性进行了分析,提出了几种适于回收企业执行的营销策略,以期对再生资源回收企业有所帮助。     

住宅小区环境影响评价中社会环境影响评价内容和方法的探讨

以贵阳市青海住宅小区环境影响评价为例,论述住宅区建设项目环境影响评价中社会环境影响评价应包括的内容,评价中应采取的方法,以及应得出的结论及其分析。强调社会环境影响评价内容和方法在住宅区环境影响评价中的重要性和必要性。     

三峡库区小城镇垃圾处理模式评价指标体系研究

简要介绍了三峡库区小城镇垃圾处理现状,并在分析库区小城镇垃圾处理模式选择的各种影响因素的基础上,提出库区小城镇垃圾处理模式评价指标的选取原则,筛选并建立了库区小城镇垃圾处理模式综合评价指标体系,确定出四大类评价指标,即经济性指标、技术性指标、环境效益指标和社会环境指标,在四大类指标内又分出各自具有可操作性的亚指标。利用这个指标体系对三峡库区的可能采用的四种处理模式进行综合评价,结果表明在适宜的运输距离范围内,采用区域性联合集中处理——堆肥＋卫生填埋的处理模式,能够较好解决库区小城镇的生活垃圾处理和管理问题。     

汉中市人居环境与满意度评价研究

文章从对城市人居环境概念的剖析入手,制订了其评价指标体系。并以此通过问卷调查的形式,运用数学统计分析的方法,定量地研究了汉中市人居环境满意度,其结果表明居民一般满意汉中市的人居环境。最后为汉中市人居环境的发展提出了4点优化措施。     

商住综合开发项目环境影响评价分析

本文从商住综合开发项目环境影响评价的实践性出发,重点分析了商住综合开发项目产生的废水、废气、噪声、固体废物等对环境造成的不利影响。并针对这些影响提出了相应的防治措施。同时阐述了在进行商住综合开发项目环境影响评价过程中需要注意的问题。     

基于多主体行为决策的城市居住用地利用效用情景分析

构建包含智能主体和环境主体的城市居住空间演化情景模型,旨在探讨土地利用主体的行为决策与居住空间演化形态和土地利用效用之间的关系。调整城市政府主体的土地利用政策设定紧凑型、松散型和适度型三种居住空间演化情景类型,通过综合分析城市居民、住宅开发商和城市政府三类微观主体的相互作用求取每种情景下住宅用地开发的综合优先级函数。在VC和ArcGIS的实验环境下,以武汉市洪山和武昌区为实验区模拟了三种规定情景下实验区在1998年至2008年期间的居住空间演化情况,并与实际演化情况进行扩张形态和土地利用社会效用的概略对比,对比结果表明,多主体模型能有效比对不同主体空间决策情景下土地利用的效用,在表现土地利用主体的意愿方面更有优势,更能反映城市土地利用结构演变的内在规律。