Dynamics of wetland landscape pattern in Kaifeng City from 1987 to 2002 |
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| Authors: | Xinxiang Cao |
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| Institution: | [1]College of History and Culture, Henan University, Kaifeng 475001, China [2]Key Research Institution of Yellow River Civilization and Sustainable Development, Henan University, Kaifeng 475001, China |
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| Abstract: | It is very significant for urban development and urban wetland protection and utilization to probe into the process and reasons of urban wetland landscape dynamics.Taking the information of remote sensing and detailed land survey data as the basic information sources,with the help of RS and GIS,according to the principles and methods of landscape ecology,this paper analyzed wetland landscape pattern dynamics and its reasons in Kaifeng City,Henan Province of China,from 1987 to 2002.The results show that the total wetland area in Kaifeng City firstly reduced by 20.1%from 1987 to 1990 and then increased from 1990 to 2002,with an average annual growth rate of 3.3%.At the same time,landscape fragment degree and landscape dominance degree increased,respectively from 0.64 to 0.72 and from 0.3754 to 0.5563,but mean patch area,maximum patch area,patch fiaetal dimension reduced.As far as single landscape element concerned,from 1987 to 2002,patch area,patch number,patch density,patch shape and patch location changed in varying degrees in all wetland types in Kaifeng City,among which rice field changed most and others relatively less.In the recent 20 years,rice fields,lake wetlands,puddles and ponds had a higher stability,but river and bottorrdand wetlands were mostly transformed to land use types.The change of wetland landscape pattern was the result of the combined action of the Huanghe (Yellow) River,urban expansion,wide cultivation of rice,and rapid development of fishery.Among them human activities were the main driving factors for wetland landscape changes. |
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| Keywords: | wetland landscape pattern landscape dynamics Kaifeng City |
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