Abstract
Land use planning is always officially implemented as an effective tool to control urban development and protect farmland. However, its impact on land use change remains untested in China. Using a case study of Hang-Jia-Hu region, the main objective of this paper was to investigate the influence of different land use spatial control schemes on farmland conversion and urban development. Comparisons of farmland conversion and urban development patterns between the urban planning area and the non-urban planning area were characterized by using remote sensing, geographical information systems, and landscape metrics. Results indicated that farmland conversion in the non-urban planning area was more intensive than that in the urban planning area, and that farmland patterns was more fragmented in the non-urban planning area. Built-up land patterns in the non-urban planning area showed a trend of aggregation, while those in the urban planning area had a dual trend of fragmentation and aggregation. Existing built-up areas had less influence on built-up land sprawl in the non-urban planning area than that in the urban planning area. Built-up land sprawl in the form of continuous development in the urban planning area led to farmland conversion; and in the non-urban planning area, built-up land sprawl in the form of leapfrogging development resulted in farmland areal declines and fragmentation. We argued that it is a basic requirement to integrate land use plans in urban and non-urban planning areas for land use planning and management.
Highlights
Built-up land covers about 400,000 km2 of the global terrestrial surface, and the number is estimated to reach 700,000 km2 by 2030 [1]
We argued that it is a basic requirement to integrate land use plans in urban and non-urban planning areas for land use planning and management
The fragmentation was evidenced by the significant increases of number of patches (NP), shape index (SHAPE), and splitting Index (SPLIT) for builtup land (Table 1)
Summary
Built-up land covers about 400,000 km of the global terrestrial surface, and the number is estimated to reach 700,000 km by 2030 [1]. Spatial planning, allocating different land uses to specific units by weighing the trade-offs among conflicting, has been implemented in many countries and regions, including the Italy, Spain, UK, Germany, Netherland, USA, Irish, China, and so on [27,28,29,30]. The land use control schemes are divided into different spatial domains. Several countries divide the spatial domains into urban, exurban, and rural planning areas, while the watershed is used as the unit in spatial planning for water quality management in the European Unions. Coming into effect from April 1st 1990, China's “Urban Planning Law” divides the land planning into two spatial domains: the urban planning area and the non-urban planning area. The main objective of delineating the urban planning area is to control land use of urban construction and to ensure the progressive realization of the overall urban master plan
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