SCIENTIA GEOGRAPHICA SINICA ›› 2022, Vol. 42 ›› Issue (5): 926-937.

### Study on the Influence of Land Use Evolution of Scale, Structure and Pattern on Urban Thermal Environment: A Case Study of Xi’an

Huang Xiaojun1,2,3(), Song Tao1, Wang Bo4, Zheng Dianyuan1, Qi Mingyue1

1. 1. College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, Shaanxi, China
2. Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Xi’an 710127, Shaanxi, China
3. Shaanxi Xi’an Urban Forest Ecosystem Research Station, Xi’an 710127, Shaanxi, China
4. GuangDong Urban & Rural Planning and Design Institute Co., LTD., Guangzhou 510290, Guangdong, China
• Received:2021-02-08 Revised:2021-07-10 Online:2022-05-25 Published:2022-07-11
• Supported by:
National Natural Science Foundation of China(41971178)

Abstract:

Land use change is closely related to urban thermal environment. This paper uses remote sensing image data to interpret and invert the land use types and land surface temperature (LST) of Xi’an in 2000, 2008 and 2016 respectively, and analyzes land use changes from scale, structure, and pattern. Meanwhile, the characteristics of thermal environment changes in Xi′an are explained. On this basis, the relationship between land use changes and thermal environment changes is systematically analyzed to reveal the impact of land use changes on the urban thermal environment. The results are as follows: 1) From 2000 to 2016, with the increase of construction land, the average LST of Xi’an City showed a rising trend. The proportion of cultivated land and construction land was positively correlated with the change of land surface temperature, while the proportion of forest and grass land and water area was negatively correlated with the change of land surface temperature. 2) The larger the patch dominance degree, the more complex the shape and the higher the aggregation degree of forest, grass and water, the more conducive to improving the thermal environment, while the larger the patch dominance degree and the higher the aggregation degree of farmland and construction land, the higher the LST and the thermal environment deterioration. 3) The large patch forest grassland and water area with high degree of agglomeration and connectivity have a more prominent cooling effect, on the contrary, the impervious water surface formed by the construction land with high concentration has a stronger warming effect. This study can provide reference for improving urban thermal environment from the perspective of land use.

CLC Number:

• X16