Dynamic Study On Pattern Of Land Use In Hefei Based On Landscape-Ecology

In recent years,the study on the changing of land use has become one of an important fields studied in global change.The east of china,Anhui Province is one of the most developed economic areas in China as the represents of Hefei city.With the development of the economic and industrialization and urbanization,the changing of land use is greater. As a case study of Hefei city,it has had huge achievement in socio-economy development in recent years.At the same time,the land use and landscape have great changed. Therefore it is typical and representative to study on the land-use and landscape of Hefei city.It is helpful for the study on the land exploiture and use of the Anhui province and the other economic developed area in China.Full study was divided into four parts.Firstly,this paper analyzed the land use condition and changing of Hefei city from 1995 to 2002 based on the land use current situation map.The changing of land use mainly include the changing of the land quantity and the change of land use speed and land use type transfer matrix research technique.It showed land use types of Hefei city have not changed in the study period.However,the areas of land use have changed,for except,area of arable land reduced 1368.18 hm~2 and the average annual rate of change was 0.64 percent;The area of urban and rural,space residents increased 1361.2 hm~2 and the average annual rate of change was 1.32%;The water's area increased 6.97 hm~2 and he average annual rate of change was 0.037 percent.Woodland and grassland did not change significantly.It used the Markov transition matrix methodology to indicate that the main types were arable land,land of urban,rural and residents and waters in the mutual conversion of land use change.For example,which is the greatest change in the conversion from arable land to the land of urban,rural and resident.It was 1361.75 hm~2 that accounting for 99.4%in the total land change,followed by the conversion from arable land to the water,and then from the land of urban,rural and residents to the arable land accounted for 0.5%and 0.1%in the total land change,respectively.Secondly,In this paper,the main driver factors of land-use change in Hefei,such as demographic factors,economic factors,industrialization and urbanization,and policy factors,as well as natural factors,which were qualitatively analyzed and then through the SAS statistical software and statistical data of related socio-economic form 1995-2002 in Hefei,the author analyzed the driving force of land use change by making quantitative methods which is a principal component analysis.The results can be seen that a correlation coefficient is 0.9976 between the total population and the level of urbanization as well as a correlation coefficient of the total population and GDP is 0.9953.It indicated a significant positive correlation between them.We obtained the first principal component:L1=0.398X1+0.397 X2+0.396 X3+0.382 X4+0.378 X5+0.387 X6+0.275 X7 +0.116 X8The analysis of factor loading indicates that the large amount are X1(total population), X2(GDP) and X3(the level of urbanization).These belong to the population and socio-economic development factors,so it showed that population factors and economic factors were main factors influencing land use change in Hefei.Load amounts of X7 (average temperature) and X8(rainfall) and other natural factors are the smaller.These are not great influence and not major drivers in this study period.The results of the quantitative analysis was basically in line with its qualitative analysis about the driving force of land-use change in HefeiAgain,it analyzed land-use changes in the dynamic landscape pattern in Hefei city from 1995 to 2002 by GIS.It included patch condition and the landscape horizontal index of general layout change analysis.According to the selected landscape diversity index,the greatest diversity index,evenness index,the dominance index,splitting index and fragmentation index,we analyzed the general landscape pattern of land-use in Hefei.The results showed that the splitting index of the grassland landscape(18.809) is maximal, which distributes the most widely and decentralized in the landscape.The splitting index of arable land(0.207) is minimum that distributes more concentrated in the landscape.The diversity index and evenness index rise and the dominance index falls.The fragmentation index is higher.So it indicated Hefei city still lies in the early and mid-term of land-use pattern of landscape fragmentation of the stage.Then we analysis some problems about landscape pattern in Hefei.Finally,according to the quantitative and qualitative analysis about land-use change and changes in landscape pattern,the theory and methods of landscape ecology and landscape ecological security pattern.The article has put forward the suggestions of land use and landscape pattern and construction of ecological security landscape pattern.These suggestions provided the basis for sustainable land use and the urban landscape ecological construction...