越南峴港城市綠地景觀格局研究.pdf

1、Researching temporal changes of land use and land cover from satellite images has been conducted in Vietnam several years.However, few studies have been done to consider seriously the relationship between land use and la

2、nd cover changes and the fragmentation of landscape.Hence, this paper aims at systematically analyzing the landscape pattern and the structure of green space of Da Nang city by applying the principles and methods of land

3、scape ecology helps divulging the reciprocations among anthropogenic factors, the environment and the urban landscape, through which urban landscape planning, optimizing urban landscape and urban planning actions could b

4、e efficaciously supported.Based on Landsat Multi-Spectral Scanner, Landsat Enhanced Thematic Mapper Plus,ASTER satellite images, the support of GIS, RS technology and with fixed appropriate grain, the Multivariate Altera

5、tion Detection approach was employed for processing and post-classification change detection, from which major landscape indices were applied by using FRAGSTATS.The resuits showed that during the whole study period the l

6、andscape structure of the grcenspace is not reasonable: Park greens is the dominant type and road greens and residence greens is obviously less;The SHDI of whole greens is relatively low which means the greens type is mo

7、notonous.Results also revealed that its landscape is relatively fragile in which new-built districts have higher PD than the old-built ones; The FRAC-MN of this area is low and the patch shape is regular, artificial, lac

8、king natural shapes.Furthermore, the density of corridor is low and the layout of park greens is uneven which cannot satisfy the life of local residents.Further applying the methods of Gradient Analysis and Landscape Ind

9、ex, this paper analyzes the horizontal gradient of the landscape at different extents.As a result, 400*600 m is determined as the appropriate range, and with this value, research is carried out to disclosure the space ch

10、aracteristic in some extent as well as the landscape structure of the urban greens pattern in Da Nang city.The study illustrates that in the view of type, different type of greenspace shows obvious space characteristic a

11、long belt gradients structure.At downtown, park greenspace is the dominant type, and in the suburbs, residence greenspace and affiliated greenspace take more space.As a whole, the urban greens are frail and the shape of

12、greenspace pattern is relatively smooth.In the view of landscape, different landscape indexes present otherness along belt gradients; LSI, SHDI and AI have distinct gradient features while PD is inconspicuous.
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13、ver, spatial analysis by using landscape metrics marked the evidence of changes in landscape characteristics with an increase in total number of patches and patch density while the mean patch area was decreased during th

14、e period of 30 years.Consequently, the landscape structure of Danang city became more fragmented and heterogeneous.Some suggestions are suggested for greenspace construction to optimize greenspace systems as a whole for