| Guided by Landscape Ecology theory,this paper interpreted the remote picture of Hefei city in 2001 by GIS and investigated on the spot.It established Geographic Information System database by collecting the communication,population and land types information.According to the information,the paper discussed the distribution of green landscape and analyzed the accessibility of the overall green landscape and the green land in parks and squares within second ring road of Hefei based on the resistance distribution matrix method.At the same time,it compared the difference of landscape accessibility between the first ring road and the first-second ring road.The total area of this study is 98hm~2 and account for 78.4%of Hefei urban area. The major research contents included:the investigating and collecting of the green land within the second ring road;the research on the distribution of the green land patch numbers and size within the first ring road and between the first and the second ring road,and on the difference both the green land patch number and size in two district;the research on the accessibility of the overall green landscape and the green landscape of parks and squares within the second ring road and so on.The results as follows:1.The numbers of the green landscape patch more than 2000 m~2 are 359 in the research area.Its total area is 787.94hm~2,account for 8.03%of the research area.The numbers of the green landscape patch more than 2000 m~2 are 170 within the first ring road,and the total area is 321.4hm~2,account for 16.9%of the research area.The numbers of the green landscape patch more than 2000 m~2 is 189 between the first and second ring road,and the total area is 466.54hm~2,account for 6.1%of the research area.2.The total numbers and areas of the green landscape within the second ring road are increasing from the center to the outside,but their proportion are declining. Landscape patches distribute mainly in areas around city and in the southeast and northwest comer,but less in the northeast comer and chief server area.The green landscape patches in the first ring road are well-distributed relatively.More patches distribute in the west of between the first and the second ring road,but less in the northeast.3.Within the second ring road,the areas and the population get to the green landscape in 5 minutes by walking are 3150.7hm~2 and 454090 person,account for 32.15%of total area and 36.20%of total population respectively.The areas and the population get to the green landscape in 5-10 minutes by walking are 4735.36hm~2 and 581400 person,account for 48.32%of total area and 46.35%of total population respectively.Most of urban residents can get the nearest green land within 15 minutes.4.Within the second ring road,the areas and the population get to the nearest parks and squares in 5 minutes by walking are 1326.92hm~2 and 254746 person, account for 13.54%of total area and 20.31%of total population respectively.The areas and the population get to the green landscape in 5-10 minutes by walking are 3551.52hm~2 and 419594 person,account for 36.24%of total area and 33.45%of total population respectively.It need more than 15 minutes to get the green landscape for other areas and population.5.The accessibility of parks and squares within the first ring road is better than that between the first and the second ring road remarkably.In particular,the proportion of the areas and population get to the green land in 5 minutes within the first ring road are more than that in the first-second ring road.6.The distribution of the numbers and areas of total green land patches within the first ring road is uniform,and the accessibility of total green land is better.The numbers and areas of parks and squares within the first ring road is higher,and the accessibility is better.Between the first and the second ring road,the numbers and areas of green land patch are higher,but the green land patch density is lower,and its distribution is not uniform.The accessibility of green land is lower than that within the first ring road.The numbers and areas of parks and squares between the first and the second ring road are lower,and are not uniform in distribution.The accessibility of parks and squares is worse than that within the first ring road. |
