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[1]LUO Jun,SUN Zhenqi,ZHANG Xuebin.Analysis of the Characteristics and Changes of Landscape Pattern of Oasis in Ganzhou District of Zhangye City Based on Ripley’s K Function[J].Research of Soil and Water Conservation,2019,26(04):224-231.

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Analysis of the Characteristics and Changes of Landscape Pattern of Oasis in Ganzhou District of Zhangye City Based on Ripley’s K Function

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 04 Page number: 224-231 Column: Public date: 2019-06-11

Title:: Analysis of the Characteristics and Changes of Landscape Pattern of Oasis in Ganzhou District of Zhangye City Based on Ripley’s K Function

Author(s):: LUO Jun^1,2, SUN Zhenqi^1,3,4, ZHANG Xuebin²; 1. College of Environment and Resources, Gansu Agriculture University, Lanzhou 730070, China;
2. College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, China;
3. State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
4. University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: landscape pattern; scale; cluster; Zhangye Oasis

CLC:: P901

DOI:: -

Abstract:: By using the land use data of Ganzhou District, Zhangye City in 1987, 2000, 2011 and 2016, according to the Ripley’s K and the spatial autocorrelation analytical method, we studied the characteristics and changes of landscape pattern in oasis of Ganzhou District. The results showed that from 1987 to 2016, farmland was the landscape matrix in the research area, which was surrounded by unutilized land, while forestland, water area, grassland and urban and rural construction land were the patches or corridors, which spatially clumped significantly at all scales. The areas of farmland, urban and rural land and forestland were increasing, the areas of water area, grassland and unutilized land were reducing, and the spatial aggregation of water area and urban and rural land were stronger than grassland, unutilized land, forestland and farmland. The landscape elements had small aggregation features and positive spatial correlation every year, the correlation gradually declined, which seemed that landscape pattern of research area was developing towards random distribution. The spatial patterns of grassland and urban and rural land were cluster at the bigger scale, forestland, unutilized land and farmland were cluster at smaller scale, and water area was cluster at smaller scale of the order time, and cluster at bigger scale of the recent time. The spatial aggregation of natural landscape was stronger at different levels, and the proportion of area was keeping falling, but the proportion of area was continuously rising for the artificial landscape, which seemed that the types of landscape had become simple in the research area, and human activity had caused significant effect on the landscape pattern.

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