Spatio-temporal evolution pattern of wetland landscape in the Yellow River Basin

doi:10.13474/j.cnki.11-2246.2021.301

Abstract

Abstract: The study on the spatio-temporal evolution of wetland landscape is an important reference for the follow-up wetland ecological restoration and protection. This paper uses the land using data of the Yellow River Basin from 1980 to 2015 to construct the wetland vector data set in the Yellow River Basin, and analyzes the spatio-temporal evolution characteristics of the wetland in the Yellow River Basin quantitatively and qualitatively based on the landscape metrics. The transfer matrix is used to calculate and analyze the transfer type and quantity of wetland resources in each two periods. The research results shows that:①From 1980 to 2015, the wetland rate of the Yellow River Basin was 3.5%, in which the natural wetland rate was about 2.0%, which means that the wetland type of the Yellow River Basin is mainly natural wetland. ② The results of patch area showes that the total area of wetland in the Yellow River Basin is decreased by 312.74 km², represented by the constructed wetland increased and the natural wetland decreased. The marsh wetland increased in natural wetland, mainly in 2005-2010, increased by 979.22 km², and the beach decreased by 1 218.19 km², mainly occurred during 1990-1995 and 2005-2010. The results of PD showes that the degree of patch fragmentation increases gradually with the increase of human activities. The results of LPI show that paddy field is the dominant wetland type in the Yellow River Basin, swamp and lake are the dominant wetland types in the natural wetland. ③ The transformation between wetland type and others is the main component of landscape transformation in the Yellow River Basin, in which marsh and floodplain are the main transferred types with others.

Key words: wetlands in the Yellow River Basin, spatio-temporal evolution pattern, landscape metrics, transfer matrix

CLC Number:

P208

LI Heying, ZHANG Jianchen, GUO Jianzhong. Spatio-temporal evolution pattern of wetland landscape in the Yellow River Basin[J]. Bulletin of Surveying and Mapping, 2021, 0(10): 28-33.

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