A quantitative method to detect the ventilation paths in a mountainous urban city for urban planning: A case study in Guizhou, China

2016 ◽  
Vol 26 (3) ◽  
pp. 422-437 ◽  
Author(s):  
Shi Ling Chen ◽  
Jun Lu ◽  
Wei Wei Yu
Keyword(s):  
Land Use ◽  
Urban Land Use ◽  
Frontal Area ◽  
High Mountain ◽  
Least Cost Path ◽  
Area Index ◽  
Mapping Procedure ◽  
Urban City ◽  
Local Topography ◽  
The Government

In this paper, a new frontal area index (FAI) mapping method is presented to describe the surface roughness of Renhuai, as an example of typical medium high mountain gorge type Karst city. Comparing with the traditional calculating method of FAI, a local topography (hills) factor is added to the calculation of the FAI in each 100 m × 100 m grid cell. The results show that the modified FAI is more strongly related to the mountainous land-use type than traditional, and local topography regions with large podium structure had higher values than other urban land-use types in mountainous city. With the frontal area index mapping procedure and a self-compiled least cost path analysis method, the potential airflow corridors traversing through the study area can be located, and the total computation time is shorter and less than 1 s. Air volume, a significant measurement index of urban ventilation capacity, is then simulated in computational fluid dynamics model (CFD-PHOENICS) to confirm the significance and efficiency of these specific ventilation corridors. Based on our findings, the government and urban planners may use the descendent maps to understand the urban ventilation paths within a mountainous city for urban local renovation decisions.

scholarly journals Coupling Analysis of Urban Land Use Benefits: A Case Study of Xiamen City

Land ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 155
Author(s):  
Xuanming Ji ◽  
Kun Wang ◽  
Tao Ji ◽  
Yihua Zhang ◽  
Kun Wang
Keyword(s):  
Land Use ◽  
Urban Land ◽  
Urban Land Use ◽  
Environmental Benefits ◽  
Sustainable Urban Development ◽  
Positive Trend ◽  
Entropy Weight ◽  
Xiamen City ◽  
The Government ◽  
Coordination Degree

The high coupling coordination of urban land use benefits is a significant factor for urbanization and sustainable urban development. This study, based on the statistical data from 2002 to 2017 of Xiamen City, constructs an index system that includes social, economic, ecological, and environmental benefits by evaluating the overall coupling coordination degree of land use benefits, using the entropy weight method (EWM), the coupling coordination degree (CCD) model, and the dynamic coupling coordination degree (DCCD) model. The results show that the coupling degree of Xiamen City’s land use is relatively low, while showing a positive trend of development. In terms of the management of land use, the market should play a major role to achieve more efficient land use and promote industrial upgrading. The government should take responsibility for supplying infrastructure, perfecting related laws and regulations, intervening the land use according to the law of markets, and expanding the investment in education, as well as science and technology.

scholarly journals Proposal of building a standard geodatabase for urban land use

2018 ◽  
Vol 162 ◽  
pp. 03024
Author(s):  
Haifaa Husein ◽  
Oday Jasim ◽  
Saja Mahmood
Keyword(s):  
Land Use ◽  
Undergraduate Students ◽  
Urban Areas ◽  
Survey Methods ◽  
Digital Processing ◽  
Great Difficulty ◽  
Urban Land Use ◽  
Land Uses ◽  
Local Data ◽  
Urban City

The digital technologies represented by digital processing programs, local data bases and satellite receivers system is a set of technologies made to organize the process of building descriptive field database, and conveying them to computers, in order to store, analyze and manifest data as well as upgrade and extract it in the form of digital maps, which represent an asset in any engineering and planning study. For a variety of types of mixed land uses and others land uses in the urban city, which cause great difficulty in how to build spatial Geodatabase in terms of frequency of the land use and overlap between land uses, the paper will find the proposed standard Geomatics techniques to get rid of these difficulties. The paper will tackle the engineering and survey methods which could reinforce manifestation of uses of logical database in urban areas. Lastly, the research concludes that relying on important field survey and digital references in preparing suggested criteria for field uses, in addition to the recommendations provided in this field for the post graduate and undergraduate students as well governmental specialized departments.

scholarly journals A ASSESSMENT OF URBAN LAND USE CHANGE AND ITS EFFECT ON SOCIAL SUSTAINABILITY IN NIGERIA

2019 ◽  
Vol 4 (2) ◽  
pp. 66-68
Author(s):  
Ogungbenro MATTHEW TAIWO
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Land Use Changes ◽  
Social Sustainability ◽  
Physical Development ◽  
Urban Land ◽  
Urban Land Use ◽  
The Social ◽  
Scholarly Discussion ◽  
The Government

Many cities in Nigeria are characterised with various land use changes and developments resulting from the menace of urbanization. Tragically, many of these developments are sporadical and unguided, thus, infringing on the social sustainability of these cities. Although it is widely accepted that development must be sustainable, its connection with land use change has not been sufficiently investigated in scholarly discussion especially in Nigeria. This study through literature revision observed that while pursuing physical development occasioned by land use change, little or no attention has been given to the aspect of social sustainability; thus, posing challenges to the peoples’ sense of urban liveability in Nigeria. It was recommended among others that changes in urban land use must be well monitored by the government agencies to avoid harphazard growth in the urban fabrics. The urban land users also must be responsible for adhering to land use guides so as to safeguard the interest in land of the unborn generation

scholarly journals Planning For Sustainability: Transportation and Land Use in Ilorin, Nigeria

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Raphael Abiodun Olawepo ◽  
Yusuf Alapata Ahmed ◽  
Ayodeji Asaju
Keyword(s):  
Land Use ◽  
Urban Land Use ◽  
Light Rail ◽  
Residential Areas ◽  
Public And Private ◽  
Transportation Demand ◽  
Port Harcourt ◽  
The Government ◽  
The City ◽  
Public And Private Partnerships

The increase in the growth of cities and the numbers of people moving to cities in the last two decades have led to sharp increase in transportation demand and development of slums and urban sprawl. Cities like Lagos, Ibadan, Kano, Port-Harcourt and Ilorin and other areas in Nigeria are experiencing many pressure on land use such as;, free-space, transportation facilities and a host of urban related problems which urgently deserve planners’ attention. Ilorin is one of the fastest growing cities in Nigeria. The problems of transportation and land use in Ilorin can be summarized into the following: long queue of people daily at ‘bus stops’, the problem of old narrow streets in most of the unplanned areas of the city and the emerging incursion of transport infrastructural facilities into the residential areas. To address these and other urban land-use problems world-wide, various governments have put in place different urban renewal programmes, but in the case of Nigeria little impacts on the city transportation and land-use systems had taken place. This research used exploratory method to justify the essence of planning in transportation system and on land-use in order to enhance and maintain sustainable development. The paper also suggests some measures like; expansion of existing narrow roads and provision of necessary infrastructural facilities, inter modality light rail/tram, creation of modern parks at specified locations as well as enlargement of public and private partnerships-involving the Government, transport associations, financial institutions, the available universities and some other professional bodies to serve as panacea to problems highlighted.

scholarly journals Reversing Uncontrolled and Unprofitable Urban Expansion in Africa through Special Economic Zones: An Evaluation of Ethiopian and Zambian Cases

2020 ◽  
Vol 12 (21) ◽  
pp. 9246
Author(s):  
Jiabo Xu ◽  
Xingping Wang
Keyword(s):  
Land Use ◽  
Policy Reform ◽  
Urban Expansion ◽  
Urban Land Use ◽  
Land Policy ◽  
Land Market ◽  
Special Economic Zones ◽  
African Countries ◽  
The Government ◽  
Economic Zones

Despite the growing attention on uncontrolled and unprofitable urban sprawling in many African countries, few pragmatic solutions have been raised or effectively implemented. While uncontrolled and unprofitable urban expansions happened primarily due to poor land use management and dysfunctional land market, the cost of land management enforcement and reform is high. This paper suggests that the recently re-emerging special economic zones (SEZs) in Africa could be a practical way of using government intervention to reduce uncontrolled urban expansion and optimize urban land use. By evaluating the spatial impacts of two SEZs on their host cities in Ethiopia and Zambia, this paper demonstrates that SEZs could notably change urban expansion in terms of its speed, direction, and spatial structure. By using SEZs as an experimental area for land policy reform, the government can also effectively unlock a profitable urban development model with the functional primary and secondary land market. However, the diverging results in Ethiopia and Zambia also show that the optimizing effect can be significant only when the government is participatory and can fulfil its public function, including delivering proper planning in advance, lunching land policy reform, and even executing compulsory land acquisition for public interests.

scholarly journals Urban Land Use Efficiency under Resource-Based Economic Transformation—A Case Study of Shanxi Province

Land ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 850
Author(s):  
Xin Janet Ge ◽  
Xiaoxia Liu
Keyword(s):  
Land Use ◽  
Economic Transformation ◽  
Urban Land Use ◽  
State Council ◽  
Land Productivity ◽  
Land Use Efficiency ◽  
Use Efficiency ◽  
Main Determinants ◽  
The Government ◽  
The Impact

Shanxi, one of China’s provinces, has been approved by the State Council as the only state-level comprehensive reform zone for resource-based economic transformation in 2010. Consequently, the implementation of National Resource-based Cities Sustainable Development Planning (2013–2020) and The State Council on Central and Western Regions Undertaking of Industrial Transformation Guide were also introduced. As a result, many agricultural lands were urbanized. The question is whether the transformed land was used efficiently. Existing research is limited regarding the impact of the government-backed transformation of the resource-based economy, industrial restructuring, and urbanization on land use efficiency. This research investigates urban land use efficiency under the government-backed resource-based economy transformation using the Bootstrap-DEA and Bootstrap-Malmquist methods. The land use efficiency and land productivity indexes were produced. Based on the empirical study of 11 prefectural cities, the results suggest that the level of economic development and industrial upgrading are the main determinants of land use efficiency. The total land productivity index declined after the economic reform was initiated. The findings imply that the government must enhance monitoring and auditing during policy implementation and evaluate the policy effects after for further improvement. With the scarcity of land resources and urban expansion in many cities worldwide, this research also provides an approach to determining the main determinants of land use efficiency that could guide our understanding of the impact of the future built environment.

scholarly journals Planning For Sustainability: Transportation and Land Use in Ilorin, Nigeria

2020 ◽  
Vol 3 (2) ◽  
pp. 18-30
Author(s):  
Raphael Abiodun Olawepo ◽  
Yusuf Alapata Ahmed ◽  
Ayodeji Asaju
Keyword(s):  
Land Use ◽  
Urban Land Use ◽  
Light Rail ◽  
Residential Areas ◽  
Public And Private ◽  
Transportation Demand ◽  
Port Harcourt ◽  
The Government ◽  
The City ◽  
Public And Private Partnerships

The increase in the growth of cities and the numbers of people moving to cities in the last two decades have led to sharp increase in transportation demand and development of slums and urban sprawl. Cities like Lagos, Ibadan, Kano, Port-Harcourt and Ilorin and other areas in Nigeria are experiencing many pressure on land use such as;, free-space, transportation facilities and a host of urban related problems which urgently deserve planners’ attention. Ilorin is one of the fastest growing cities in Nigeria. The problems of transportation and land use in Ilorin can be summarized into the following: long queue of people daily at ‘bus stops’, the problem of old narrow streets in most of the unplanned areas of the city and the emerging incursion of transport infrastructural facilities into the residential areas. To address these and other urban land-use problems world-wide, various governments have put in place different urban renewal programmes, but in the case of Nigeria little impacts on the city transportation and land-use systems had taken place. This research used exploratory method to justify the essence of planning in transportation system and on land-use in order to enhance and maintain sustainable development. The paper also suggests some measures like; expansion of existing narrow roads and provision of necessary infrastructural facilities, inter modality light rail/tram, creation of modern parks at specified locations as well as enlargement of public and private partnerships-involving the Government, transport associations, financial institutions, the available universities and some other professional bodies to serve as panacea to problems highlighted.

Physical, Chemical, and Biological Methods and Data from the Urban Land-Use-Gradient Study, Des Plaines and Fox River Basins, Illinois, 1999-2001

2001 ◽  
Author(s):  
Debbie L. Adolphson ◽  
Terri L. Arnold ◽  
Faith A. Fitzpatrick ◽  
Mitchell A. Harris ◽  
Kevin D. Richards ◽  
...  
Keyword(s):  
Land Use ◽  
River Basins ◽  
Urban Land ◽  
Urban Land Use ◽  
Physical Chemical ◽  
Biological Methods ◽  
Fox River

THE IMPACT OF DIFFERENT URBAN LAND USE TYPES ON AIR POLLUTION IN THE MEGACITY OF SÃO PAULO

2020 ◽  
Vol 7 (1) ◽  
pp. 91
Author(s):  
Júlio Barboza Chiquetto ◽  
Maria Elisa Siqueira Silva ◽  
Rita Yuri Ynoue ◽  
Flávia Noronha Dutra Ribieiro ◽  
Débora Souza Alvim ◽  
...  
Keyword(s):  
Land Use ◽  
Air Pollution ◽  
Urban Land ◽  
Sao Paulo ◽  
Urban Land Use ◽  
São Paulo ◽  
Land Use Types ◽  
The Impact

A poluição do ar é influenciada por fatores naturais e antropogênicos. Quatro pontos de monitoramento (veicular, comercial, residencial e background urbano (BGU))da poluição do ar em São Paulo foram avaliados durante 16 anos, revelando diferenças significativas devidoao uso do solo em todas as escalas temporais. Na escala diurna, as concentrações de poluentes primários são duas vezes mais altas nos pontos veicular e residencial do que no ponto BGU, onde a concentração de ozonio (O3) é 50% mais alta. Na escala sazonal, as concentrações de monóxido de carbono(CO) variaram em 80% devido ao uso do solo, e 55% pela sazonalidade.As variações sazonais ede uso do solo exercem impactos similares nas concentrações de O3 e monóxido de nitrogênio (NO). Para o material particulado grosso (MP10) e o dióxido de nitrogênio(NO2), as variações sazonais são mais intensas do que as por uso do solo. Na série temporal de 16 anos, o ponto BGU apresentou correlações mais fortes e significativas entre a média mensal de ondas longas (ROL) e o O3 (0,48) e o MP10 (0,37), comparadas ao ponto veicular (0,33 e 0,22, respectivamente). Estes resultados confirmam que o uso do solo urbano tem um papel significativo na concentração de poluentes em todas as escalas de análise, embora a sua influência se torne menos pronunciada em escalas maiores, conforme a qualidade do ar transita de um sistema antropogênico para um sistema natural. Isto poderá auxiliar decisões sobre políticas públicas em megacidades envolvendo a modificação do uso do solo.

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