基于遥感信息的植被变化对岱海湖面积的影响

doi:10.12190/j.issn.2096-1197.2022.05.16

Abstract

Abstract:

【Objective】By exploring the impact of changes in vegetation coverage on the area of Daihai Lake，clarify the relationship between the mode and scope of human production activities and wetland changes，provide a theoretical basis for the scientific formulation of lake protection planning.【Methods】The research area was the basin formed by the main tributaries of Daihai Lake. Based on seven sets of remote sensing data of the area from 1990 to 2020，the impact of vegetation change on the surface area of the Daihai Lake was analyzed using gravity center migration analysis，land type transfer matrix and correlation analysis.【Results】From 1990 to 2020，the surface area of Daihai Lake had a declining trend，which was 110.833 0 km² in 1990 and 48.122 5 km² in 2020，decreased by 62.710 5 km². Prior to 2005，the gravity centre of the lake surface shifted rapidly to the northeast，and gradually moved to north by west after 2005. With correlation coefficients of -0.90，-0.90，-0.93 and -0.86，respectively，the area change of Daihai Lake was significantly negatively correlated with dry land，herbaceous cover，irrigated cropland and forest，and significantly positively correlated with grassland and sparse vegetation，with correlation coefficients of 0.82 and 0.80 respectively. The area of dry land，herbaceous cover，irrigated cropland and grassland within 1 km around Daihai Lake had high correlations with the area change of Daihai Lake，with correlation coefficients of -0.95，-0.94，-0.96 and 0.92 respectively.【Conclusion】The destruction of the native grassland vegetation by agricultural reclamation within 1 km around Daihai Lake was the primary production activity that contributed to the decrease in Daihai Lake′s surface area.

Key words: Daihai Lake area, Vegetation coverage, Remote sensing information, Interannual variation, Transfer matrix, Correlation analysis

CLC Number:

P343.3

LIU Kai, SUN Li, ZHANG Zhicheng, ZHANG Peng, LIU Jingshan, ZHANG Cunxia. Influence of vegetation change on the area of Daihai Lake based on remote sensing information[J].Journal of Northern Agriculture, 2022, 50(5): 112-118.

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Influence of vegetation change on the area of Daihai Lake based on remote sensing information

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