Temporal and Spatial Evolution of Landscape Pattern in Dongting Lake Area under the Influence of Land Use Change
Received date: 2019-08-16
Revised date: 2020-06-03
Online published: 2025-04-23
Exploring the relationship between land use change and landscape pattern can provide a basis for regional ecological management. Taking the Dongting Lake area as the research area, this study comprehensively applies the geographic information system (GIS) and landscape pattern method to quantitatively describes the temporal and spatial evolution of land use and landscape pattern based on the remote sensing images of the four periods of 2000, 2005, 2010 and 2015, and furthermore, it uses OLS regression to analyze the relationship between land use change and landscape pattern.The results show that: 1) Land use has undergone significant changes under the conditions of economic and social development such as the construction of development zones and new urban, newly-added construction land mainly comes from the arable land and woodland, the construction land and unused land are continuing to grow, while arable land, woodland, grassland and water area are reducing significantly. 2) At the landscape level, the degree of fragmentation of the landscape pattern in the Dongting Lake area increases and the degree of aggregation decreases, it increases on the degree of fragmentation of woodland and grassland, and the fragmentation of woodland is effectively controlled. On the spatial scale, the landscape index changes significantly within the built-up area. 3) Based on the classification, it shows an upward trend on the degree of agglomeration of the landscape pattern. It has a strong relationship between the landscape pattern change and the changes of arable land, woodland, unused land and construction land. The expansion of construction land has increased the heterogeneity and fragmentation of the whole landscape pattern. This paper puts forward corresponding countermeasures to better coordinate and optimize the relationship between spatial development and landscape pattern in the Dongting Lake area.
NING Qimeng , OUYANG Haiyan , TANG Fanghua , ZENG Zhiwei . Temporal and Spatial Evolution of Landscape Pattern in Dongting Lake Area under the Influence of Land Use Change[J]. Economic geography, 2020 , 40(9) : 196 -203 . DOI: 10.15957/j.cnki.jjdl.2020.09.021
表1 2000—2015年土地利用结构变化Tab.1 Land use structure during 2000-2015 |
时间 | 土地利用类型 | ||||||
---|---|---|---|---|---|---|---|
耕地 | 林地 | 草地 | 水域 | 建设用地 | 未利用地 | ||
面积(km2) | 2000 | 17 070.29 | 21 036.29 | 789.20 | 4 878.15 | 877.08 | 715.58 |
2005 | 16 922.23 | 21 024.67 | 781.54 | 5 002.37 | 950.96 | 684.84 | |
2010 | 16 850.28 | 21 009.83 | 744.89 | 4 994.63 | 1 016.87 | 750.11 | |
2015 | 16 662.36 | 20 953.13 | 726.02 | 4 474.96 | 1 583.89 | 966.25 | |
面积变化(km2) | 2000—2005 | -148.06 | -11.62 | -7.66 | 124.22 | 73.88 | -30.74 |
2005—2010 | -71.95 | -14.84 | -36.65 | -7.74 | 65.91 | 65.27 | |
2010—2015 | -187.92 | -56.70 | -18.87 | -519.67 | 567.02 | 216.14 | |
2000—2015 | -407.93 | -83.16 | -63.18 | -403.19 | 706.81 | 250.67 |
表2 景观格局中土地利用变化的强度和方向Tab.2 The intensity and direction of the land use change in landscape patterns |
景观指数 | 相关方程 | p-Value* |
---|---|---|
PD | PD=-1982-0.676耕地-368林地-34.7建设用地-46.3草地+983未利用地+38水域 | 0.000 |
ED | ED=-10036-7.62耕地-2631林地-162建设用地-361草地+6437未利用地+183水域 | 0.000 |
AI | AI=-12.3+0.00267耕地+1.87林地+0.137建设用地+0.438草地-3.57未利用地-0.125水域 | 0.000 |
FRAC | FRAC=182+0.106耕地+34.7林地+2.16建设用地+5.02草地-86.2未利用地-1.91水域 | 0.000 |
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