Applied Mechanics and Materials Vols. 409-410

Abstract: The redevelopment of brownfield sites requires the involvement of the skills and resources of the private operator for the technical risks associated with the transformation and the high financial commitments. In the current scarcity of public resources, among the most widely used schemes there is one that provides development rights of equivalent value to locate on the areas to recover in order to compensate the amounts incurred by the private investor. The model developed and tested in this paper deals with this theme. It produces a wide range of possible urban parameters to attribute to the regenerated areas, upon which it is possible to develop the negotiation between the public and private sectors in order to define the solution to be implemented. The experimental results of the model highlight the usefulness of activating regeneration initiatives, and in particular of contaminated sites.

Abstract: The Paper discusses the experiences of Singapore in city image building under the guidance of urban planning. By making use of such methods as documentary study and on-the-sport survey and starting from an angle of city image association, three elements for city image building are established and, based on those, the strategies of Singapore in city image building are touched on, mainly reflecting in following aspects: 1) with regard to city image mind identity, Singapore has undergone a transition from ‘Instant Asia’ to ‘Your Singapore’; 2) with respect to city image behavior identity, citizens, enterprises and government are encouraged to jointly participate in marketing city image and 3) as for city image visual identity, it has strengthened heritage protection, built the brand of cultural entertainment, planned and modeled city image by taking culture as guidance.

Abstract: Chinese urbanization issues were analyzed from two aspects. On the one hand, segregation migrants were studied in labor market and housing conditions as invisible urbanization issue. On the other hand, over-afford housing price and urban sprawl were analyzed as prominent urbanization issue. The results show that urbanization issues arise is due to the breaking of harmonious relationship between subsystems of city.

Abstract: The urban flood control should be regulated according to the topography, rivers and the regional economics of the city. The regulating reservoirs will be built or rebuilt in the mountain area upstream; the flood would be drawn downstream through the diversion channel. The flood in city would be reduced. The program would to control the rivers in urban area, reduce the elevation of rivers downstream by the non-engineering measure in order to decrease the effect of the backwater. In this paper, we suggested that the program of artificial damaged embankment and the flood compensation foundation as the main measures for flood control in urban area. The safety of the urban area will be ensured by both engineering measures and non-engineering measures from the flood of the rivers.

Abstract: The main objective of this paper is to propose an alternative for the stormwater management in low-income communities, settled in urban vertical slums, located in areas with insufficient infrastructure and degraded environment. A case study located in Rio de Janeiro City, Brazil, is presented. The high slopes of the studied area are used to favor the superficial flows, generating alternatives for the traditional stormdrains used to collect the runoff of the upstream reaches. A small reservoir is proposed for each house, reducing flood volumes by allowing rainwater harvesting, and a greater retention reservoir is introduced as a storage measure for connecting the microdrainage coming from the informal city to the formal city. The different scenarios were simulated with the aid of a mathematical model called MODCEL and the results showed that it is possible to apply an effective drainage system solution in informal areas, without affecting the already implemented downstream formal drainage network. The retention reservoir proposed also introduces the possibility to act in improving the water quality to downstream areas, although this complementary aspect is not developed in this study.

Abstract: The performance index system weighting of urban water supply was determined by using analytic hierarchy process. Firstly, the water supply performance index system class hierarchy was established, and then the expert scoring was conducted, the judgment matrix established, and the qualitative index quantified. Secondly, the eigenvector analytic hierarchy was sorted, and then, the indicators weights were determined. Therefore, the weight coefficient of index system by analytic hierarchy process is objective and applicable, and lay a good foundation for the performance evaluation.

Abstract: The paper established the BP neural network to predict the annual water consumption. The consumption of Tianjin urban annual water from 1991 to 2007 and its related factors including the urban population, per capita income levels, industrial output value, the city GDP, per capita daily water consumption, industrial water recycling rate are analyzed. The results show that the average deviations are 1.03%, 1.61%, and 1.26% for the hidden layer neuron number 10, 15 and 20 respectively for BP prediction. The R² value reached to 0.9587, 0.8058, and 0.8851 for the hidden layer neuron number 10, 15 and 20 respectively for BP prediction. This confirms high efficiency for the hidden layer neuron number 10 in BP prediction.

Abstract: Urban drainage system involves urban surface runoff, drainage pipeline system and rivers and its dynamic behavior is driven both by natural and artificial forces. There is a lack of appropriate and progressive hydraulic dynamic models for whole urban drainage system, together with much difficulty in collecting operation data, and backwardness of operation control techniques, thereby causing the frequent occurrence of urban flooding, sewage overflow and high energy-consumption of the pump stations. Therefore, it is hard to guarantee the security, reliability and high-efficiency of the operation of the urban drainage networks. To solve these problems, this paper proposed a large closed-loop control system model to achieve multi-objective and comprehensive operation optimization of urban drainage networks, based on the design of a new control model of a progressive system of city runoffs, drainage pipeline network and river tunnels.

Abstract: Baotou is an important industrial city developing during the modern times. Because of the effect of industrial layout, turban spatial structure has a different evolvement track and some special morphology characteristics from other cities. This paper analyses the evolvement of urban spatial structure in Baotou, and summarizes the city spatial structure characteristics, show that is the continuation of "Shuangcheng structure" model, extended along the traffic line, space structure based on industrial layout.

Abstract: Describes implication of urban space morphology, and analyzes the positive influences of the High-rise Buildings to Chongqing Urban Space Morphology from the aspects of Saving land, Reflecting the characteristics of mountainous city, Making the city has a sense of identity, Making people contacts and exchanges more convenient, Relieving the psychological pressure of people properly, and Analyzes The Negative Influences from the aspects of Physical, Social and Psychological Influences, particularly, the Light Pollution, Wind environment Pollution, acoustic Environment Pollution and Thermal environment influence of physical aspects, and The Influences on urban transport, urban space and the safety of social aspects.