Study On The Landscape Pattern Of Lugu Lake Wetland Nature Reserve In Sichuan

Lugu Lake Wetland Nature Reserve in Sichuan Province is an important human heritage.Analyzing the spatial distribution characteristics of the landscape types of the reserve and exploring the factors driving the landscape pattern change are conducive to putting forward targeted conservation planning strategies.In this paper,the Landsat 5 satellite images in 1998 and 2008 and the Landsat 8 remote sensing satellite images in 2018 are processed by visual interpretation and field investigation.This paper summarizes and compares the four characteristics of landscape change range,landscape transformation direction,landscape change rate and landscape pattern index,analyzes the temporal and spatial change rule of landscape pattern in Lugu Lake Wetland Nature Reserve in Sichuan Province,explores the driving mechanism of change from two aspects of nature and man-made by using principal component analysis,and puts forward targeted protection planning strategies.The research results are as follows:(1).Landscape pattern change of Sichuan Lugu Lake Wetland Nature Reserve from 1998 to 2018Forest land and construction land landscape continue to show an obvious increasing trend,and forest land landscape has always been the dominant patch in the landscape.The landscape of water area,cultivated land and pasture land showed a continuous decreasing trend,while the landscape of other land showed a weak trend of increasing first and then decreasing.In general,the number and density of patches are on the rise,while the diversity and evenness are on the decline.On the whole,the landscape fragmentation degree of Lugu Lake Wetland Nature Reserve in Sichuan Province is deepened,the diversity and evenness of the landscape are not high,and it is on the decline.There is an absolute advantage of forest landscape in the landscape,and the development trend of distribution of various landscape types is uneven.(2).Driving Force ResearchAmong the natural factors,precipitation,climate and topography play an important role in landscape pattern.In terms of human factors,the economic development of agriculture and forestry industry and the growth of population are the main driving forces of landscape pattern,and policy factors have a direct role in the dynamic landscape pattern.(3).Conservation planning strategyProtected areas should continue to take advantage of the matrix advantages of forest land landscapes,strengthen forest fire prevention propaganda and forest fire patrol work;continue to transform landscape patches of construction land,and strengthen the construction of ecological corridors;control the continuous decline in the area of cultivated land patches,and improve the composite use of cultivated land landscape;Control the scale and quantity of grazing,and guide grazing villagers to change the way of livelihood;reasonable tourism development,take the eco-tourism route;adhere to the implementation of a reasonable population policy,and achieve harmonious coexistence between people and the environment.