Research On The Model And Method Of Urban Comprehensive Developmemt Project Appraisal With The Consideration Of Urban Carrying Capacity

The accelerated urbanization and urban population increases asks for a higherUrban Comprehensive Carrying Capacity level. Raising the level of Urban CarryingCapacity is achieved through urban construction projects and Urban ComprehensiveDevelopment Project is a typical urban construction projects, through which the city’sCarrying Capacity is improved. However, the Urban Comprehensive DevelopmentProjects(UCDP) met a number of issues in the process of construction and operation,mainly as blind investment, damage on the natural and historical environment, theinfrastructure not comparable with construction scale and some social problems in theprocess of demolition. These problems are caused by ignoring two-way relationshipbetween UCDP and the Urban Carrying Capacity in the decision-making assessmentof the project. UCDP and Urban Carrying Capacity have a close relationshipbetween each other. The development and construction of the UCDP is usually tocompensate for some of the "gap" or improve urban functions, that is, to raise theurban Comprehensive Carrying Capacity. Meanwhile, the success of the UCDP isinfluenced and constrained by city’s natural environment Carrying Capacity, existinginfrastructure Carrying Capacity, economic and social Carrying Capacity. Based onthis, UCDP’s assessment models and methods is studied with the consideration ofcity’s comprehensive carrying capacity. Literature survey, case study and survey arelaunched to reach a assessment model and indicator on the relationship betweenUCDP and urban carrying capacity.This dissertation has carried out innovative research in the following areas whichare discussed below.1. Build the UCDP’s evaluation model with the consideration of urban carryingcapacityUCDP and Urban Capacity is inseparable, UCDP is a direct way to improve thecity’s carrying capacity. At the same time, UCDP’s construction and operation needthe support of the city’s carrying capacity. Neglecting the relationship betweenUCDP and urban carrying capacity is not conducive to improve the city’s comprehensive carrying capacity, it will also bring a lot problems in UCDP’sconstruction and operation. Based on the new perspective, an evaluation model withconsideration of carrying capacity is built. The model proposes that in the UCDP’sstart-up phase, the UCDP’s contribution to urban carrying capacity and itsdependence on the carrying capacity should be evaluated. First, UCDP’scontribution to the carrying capacity should be assessed, only the project that canmake up for the carrying capacity gap is initiated, that is the basic criteria and meansof solving the coexistence of ‘carrying capacity shortage’ and ‘carrying capacitysurplus’. Meanwhile, it is necessary to evaluate UCDP’s dependence on urbancarrying capacity. Whether city’s natural carrying capacity, economic carryingcapacity, infrastructure carrying capacity and social carrying capacity supportUCDP’s construction and operation should also be assessed in order to avoid anumber of issues happened to a lot of UCDPs.2. Build a new UCDP’s influential evaluation indicatorThe success of UCDP is influenced and constrained by city’s carrying capacity.Literature study and case study are applied on the impact and constraint factors ofUCDP’ success, and urban natural environment, urban infrastructure, urban economicand urban social---four carrying capacity elements are identified and verified, and theevaluation indicator of UCDP influenced by carrying capacity is built. The articleuses questionnaire to score these indicators by the professionals, to make sure thescientificity and effectiveness of index system.3. Promotion method of UCDP’s inadequate carrying capacity is proposedA normative method is used to analyze the basic connotation of carryingcapacity to get a promotion method when UCDP’s carrying capacity is not enough.The basic connotation of the carrying capacity has two aspects, one is the source ofpressure and the other is the bearing pressure systems. Whether it is on the range ofthe carrying capacity not only depends on ability of the bearing pressure system, italso depends on the strength of the pressure source. Now, the method to improvethe carrying capacity is usually through enhancement of the bearing pressure system,while in some cases, reduce the strength of the pressure source is the only way toinprove the inadequate carrying capacity. The city’s infrastructure inadequate carrying capacity can sometimes be made up by self-built by UCDP, while naturalenvironment, economic and social carrying capacity can not easily be changed, so theUCDP’s size and construction programs must be adapted to the level of the currentcarrying capacity.