Journal of Resources and Ecology >
Delimitation of Urban Growth Boundary Based on the Coordination of Ecology and Residential Activity Spaces: A Case Study of Jinan, China
Received date: 2019-02-21
Accepted date: 2019-05-16
Online published: 2019-10-11
Supported by
National Natural Science Foundation of China(41430861)
Copyright
Delimitation of an urban growth boundary (UGB) can effectively curb disorderly urban expansion, optimize urban development space and protect the ecological environment. Eco-environmental sensitivity was evaluated and areas prohibiting construction expansion were extracted by establishing an index system. Point of interest (POI) and microblog data were utilized to analyze the expansion of residential activity space. Urban space expansion potential was calculated using a comprehensive evaluation model, and an urban growth boundary for Jinan in 2020 was delimited combining the predicted urban expansion scale. The results showed that: (1) An evaluation of eco-environmental sensitivity can effectively protect ecological land and provide an ecological basis for urban expansion. Regions with high eco-environmental sensitivities in Jinan are located along the banks of the Yellow River and Xiaoqing River and in southeast mountainous areas, but eco-environmental sensitivities in the central, north and southeast areas are relatively low; (2) The model to evaluate urban residential activity expansion can quantify the spatial distribution of urban residents' activities. Regions with high potential for residential activity space expansion in Jinan are mainly concentrated in the middle of Jinan and most are part of existing built-up areas and surrounding areas; (3) The method that delimits urban growth boundaries based on the coordination of ecology and residential activity space is reasonable. Spatial expansion in Jinan mainly extends towards the east and west wings, and the boundary conforms to the spatial strategy guiding Jinan’s development and is consistent with the overall layout in related plans. Considering both ecological protection and the internal forces driving urban expansion, the method of urban growth boundary delimitation used in this study can provide a reference and practical help for studies and management of urban development in the new era.
JIA Kun , ZHANG Chao , YANG Yanzhao , YOU Zhen . Delimitation of Urban Growth Boundary Based on the Coordination of Ecology and Residential Activity Spaces: A Case Study of Jinan, China[J]. Journal of Resources and Ecology, 2019 , 10(5) : 518 -524 . DOI: 10.5814/j.issn.1674-764X.2019.05.007
Table 1 Classification standards of eco-environmental sensitivity in Jinan |
Factors | Insensitive | Light sensitive | Moderate sensitive | Highly sensitive | Extreme sensitive | |
---|---|---|---|---|---|---|
Topographic | Elevation (m) | ≤100 | 100-150 | 150-200 | 200-400 | ﹥400 |
Slope (°) | ≤5 | 5-15 | 15-25 | 25-35 | ﹥35 | |
Water | Distance from river (m) | ﹥1000 | 500-1000 | 200-500 | 100-200 | 0-100 |
Distance from lakes and reservoirs (m) | ﹥2000 | 1000-2000 | 500-1000 | 200-500 | 0-200 | |
Bio-inhabitation | NDVI | 0-0.2 | 0.2-0.4 | 0.4-0.6 | 0.6-0.7 | 0.7-1 |
Value | 1 | 3 | 5 | 7 | 9 |
Table 2 Classification and grading standards for expansion of residential activity space in Jinan based on POI and microblog data |
Indicators | Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ |
---|---|---|---|---|---|
POI Kernel density | 0-6000 | 6000-30000 | 30000-80000 | 80000-160000 | ﹥160000 |
Microblog Kernel density | 0-20000 | 20000-200000 | 200000-500000 | 500000-1600000 | ﹥1600000 |
Emotional attitude | < -15 | -15 - -1 | -1-1 | 1-10 | >10 |
Value | 1 | 3 | 5 | 7 | 9 |
where RS is the residential activity space expansion index; Ki is expansion grade value of factor I; and n is the number of factors. |
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