JOURNAL OF NATURAL RESOURCES ›› 2019, Vol. 34 ›› Issue (1): 66-79.doi: 10.31497/zrzyxb.20190106

• Orginal Article • Previous Articles     Next Articles

Spatio-temporal analysis of land development and utilization intensity in Tampa Bay watershed from 1985 to 2015

Gai-li HE1(), Jia-lin LI1,2(), Yong-chao LIU3,4, Xiao-li SHI5, Jing-wu MA6, Rui-liang PU7, Qian-dong GUO7, Bai-xiang FENG1, Ri-peng HUANG1   

  1. 1. Department of Geography & Spatial Information Techniques, Ningbo University, Ningbo 315211, Zhejiang, China;
    2. East China Sea Institute of Ningbo University, Ningbo 315211, Zhejiang, China
    3. Department of Geographic Information Science, Nanjing University, Nanjing 210023, China
    4. Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing 210023, China
    5. Editorial Department of Journal of Ningbo University, Ningbo 315211, Zhejiang, China
    6. Wenzhou ocean and fishery vessel safety rescue information center, Wenzhou 325000, Zhejiang, China
    7. School of Geosciences, University of South Florida, Tampa 33620, USA
  • Received:2018-08-06 Revised:2018-11-12 Online:2019-01-20 Published:2019-01-20

Abstract:

The analysis on the intensity of land development and utilization is of great significance to improving the efficency of land development and utilization and promoting ecological and environmental protection work. Taking the Tampa Bay watershed of Florida, USA as the study area, based on the information of four TM/OLI remote sensing images of 1985, 1995, 2005 and 2015, this paper constructs a series of models of land-use dynamics, conversion matrix, land development and utilization intensity and land-use structure with GIS technology. Then, it conducts research on spatial and temporal pattern of land development and utilization intensity in Tampa Bay watershed. The results showed that: (1) Construction land and woodland are the dominant types of land use in the watershed. The area of construction land mainly converted from cultivated land increased most, with the ratio being 53.74%. (2) The relative change rates of all types of land use have obvious spatial differences and those of rivers and lakes have the greatest. The change speed of unused land is the largest, with the highest single dynamic degree of up to 1.11%. The average annual growth rate of construction land is steady at about 0.30%. The size with the highest dynamic degree was decreasing from the northern and southern polar nuclei outward, and the areas with higher dynamic degrees were gradually converted into the lower dynamic areas. (3) Information entropy slightly decreased, the land use structure heterogeneity constantly decreased. Area of the land-use composition is listed in the order of Construction Land>Wood>Cultivated Land and Pasture>Rivers and Lakes>Tidal Flat and Marsh> Unused Land. (4) The intensity of land development and utilization is the highest in the Coastal Pinellas county and Tampa city. The area of development is much larger compared with the adjustment period, and the intensity of land development and utilization was obviously strengthened.

Key words: Tampa Bay watershed, land development and utilization intensity, spatio-temporal change, sustainable land use