Acta Geographica Sinica ›› 2018, Vol. 73 ›› Issue (4): 701-710.doi: 10.11821/dlxb201804009

Special Issue: 雄安新区

• Regional Development • Previous Articles     Next Articles

Identification and optimization of ecological security pattern in Xiong'an New Area

PENG Jian1,2,LI Huilei1,LIU Yanxu1,HU Yi'na1,YANG Yang2   

  1. 1. Ministry of Education Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
    2. Key Laboratory for Environmental and Urban Sciences, School of Urban Planning and Design, Shenzhen Graduate School, Peking University, Shenzhen 518055, Guangdong, China
  • Received:2017-07-21 Online:2018-04-20 Published:2018-04-10
  • Supported by:
    [Foundation: National Natural Science Foundation of China, No.41271195]

Abstract:

The establishment of Xiong'an New Area has far-reaching historical significance for adjusting and optimizing the urban layout and spatial structure of Beijing-Tianjin-Hebei region. Under the construction concept of ecological benchmark, the identification and optimization of ecological security pattern is the basic spatial approach to ensuring the ecological security and realizing sustainable development in Xiong'an New Area. Based on the ecological background characteristics of Xiongxian, Rongcheng and Anxin, this study quantified and mapped five ecosystem services, namely grain yield, water yield, soil conservation, habitat conservation and near water recreation, and identified the ecological sources. Using the VIIRS/DNB Nighttime Light data, ecological resistance surface based on land-use types assignment was modified. The minimum cumulative resistance model was used to identify the ecological corridors. Based on the current ecological security pattern, the optimization strategy of the ecological security pattern was discussed under the goal of green, ecological and livable city. The results showed that, ecological sources, which accounted for 41.88% of the total area and contained 14 major ecological patches, were mainly distributed in the areas surrounding the Baiyangdian Lake. The total length of ecological corridors was 107.21 km, which was divided into four groups with a circle distribution. The radiating area of existing ecological sources reached 70.6% of the total area. Therefore, it is necessary to build a new ecological source with a radiating area of 227 km2 to meet the demand for 85% of radiating area of the ecological source. The ecological security pattern scheme proposed in this study can provide spatial guidance for the construction of green, ecological, and livable city in Xiong'an New Area.

Key words: ecological security pattern optimization, ecological source, ecological corridor, ecosystem services, Xiong'an New Area