Study On Landscape Pattern And Landscape Ecological Planning Of Nantong

The emergence of many city problems, including environmental issues, is largely caused by the irrational landscape ecological pattern. Using the theories and methods of landscape ecology to analyse the landscape spatial patterns may effectively reveal the characters of the ecological conditions and spatial variations in the city. It helps to trace the process of the dynamic changes of landscape spatial pattern and it's driving forces. Thus, it provides an effective basis for landscape ecological safety assessment and landscape ecological planning.Nantong locates at the cross of the coastal economic belt and the Yangtze River economic belt. It has unique advantages in its location condition, investment environment and growth potential. In recent years, Nantong has obviously accelerated the pace of urban development. Along with the economic development and the strengthening of human activity, changes in the urban landscape are quite prominent. In the urban and rural ecotone, the urban expands obviously, its ecological infrastructure remains relatively lagging behind the others, and the urban spatial structure and land use are not so reasonable while the urban development lack the ecological spaces. Furthermore, the reduction of arable land and the protection of ecologically sensitive areas are more severe. Therefore, using landscape ecology principles and methods to analyse the dynamic changes of landscape pattern and perform research on landscape ecological planning is necessary and meaningful to the maintenance of healthy functioning of the urban complex ecosystem.This paper involves theoretical research and case study. On the basis of narrating and commenting the domestic and foreign cities' landscape patterns and landscape ecological planning, Nantong is adopted as a case study area. The paper analyses the characteristics of landscape pattern changes in 1986-2000, and then carry on a preliminary discussion on its driving forces. Following the instruction of landscape pattern optimization, the paper also discusses three major problems in Nantong city. The three aspects are: landscape pattern planning, green space system construction and culture preservation and construction.The main conclusions of this paper are as follows:1. In landscape pattern analysis, the paper has made a division of landscape patterns in the district of Nantong and chooses 17 landscape indexes to analyse the changes of landscape patterns. In this aspect, three main results have been achieved:(1)All types of patches in the case areas change complicatedly from 1986 to 2000, and different types have different trends. Among the changes, paddy field and glebe area have the sharpest decline in percentage of land, most of which have turn into urban areas and rural residential areas; grass land also reduced into glebe area, water areas and rural residential areas; some of the water areas transform into grass land.(2)The overall situation of changes in landscape pattern is the fragmentation degree drops, the area of predominate type reduces, the structure of landscape become complicated, the shape of landscape also become complicated, the interference of landscape strengthened , the size trends to be more even. Meanwhile, the space connectivity reduced, the level of landscape diversity raised, the heterogeneous degree increased, the land use turns toward diversification and evenness(3)The main driving forces leading to the changes of landscape pattern in Nantong areas are...