Abstract
The mega cities of China are faced with great pressure from conflict between huge land demand for construction use and limited resources. To improve this situation, it is necessary to slow the increasing rate of built-up land and even reduce the existing built-up land by improving land use efficiency. Herein, land use planning with urban sprawl deceleration is proposed. Land quotas are important tools for the control of land use planning in China, but the current quotas are mainly in the form of increment, thus cannot support land use planning with urban sprawl deceleration. To address these issues, we developed a model named “current-plan-requirement response (CPRR)”, to optimize the land quotas. With this model, we investigated the current status of land use, the process of land use planning, and the requirements of land use planning with urban sprawl deceleration in Shanghai. It was found that the current land quotas have provided somewhat inhabited conversion of arable land to built-up land, but scarcely any regulation of land use efficiency or protection of natural environment. Then, the land quotas were optimized and quota management recommendations were made. The optimized land quotas included four aspects of quotas: arable land protection, ecological conservation, scale constraint on built-up land and economical and intensive land use. These new land quotas could be used to guide reduction of built-up land and increase ecological land in China’s mega cities. It might also be beneficial for easing conflict between supply and demand of built-up land, for building an eco-friendly city land-use structure.
Highlights
The world is undergoing rapid urbanization, and the level of global urbanization is expected to reach 70% in the 40 years [1]
According to the analysis of changes in arable land, built-up land, forest and orchard, waters, and unused land between 2009 and 2013 (Table 2), and to the transition matrix between land use types (Table 3), the features associated with land use changes between 2009 and 2013 in Shanghai can be summarized as follows
A notable feature of the land use change in Shanghai is a continuous decrease in the area of arable land
Summary
The world is undergoing rapid urbanization, and the level of global urbanization is expected to reach 70% in the 40 years [1] During this process, the built-up areas of mega cities in developing countries continuously sprawl [2,3,4]. Local governments want to strive for land quota to expand built-up areas and do not fully comply with regulations that control urban sprawl In such cases, the effect of land use planning is lower than anticipated, and the sustainability of land use is threatened [22,23]. The effect of land use planning is lower than anticipated, and the sustainability of land use is threatened [22,23] Given this situation, China’s mega cities, such as Shanghai, Shenzhen, and Beijing, have all proposed land use planning with urban sprawl deceleration. The management of land quotas for land use planning with urban sprawl deceleration was explored to guide land use for mega cities
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