WETLAND EVOLUTION AND ITS DRIVING FACTORS IN SONGNEN PLAIN

LIU Qiang; LIN Nan; WANG Chang-qi; JIA Li-guo; CHENG Long; GUO Xiao-dong; ZHANG Yan

doi:10.13686/j.cnki.dzyzy.2023.01.012

2023 Vol. 32, No. 1

Article Contents

Article navigation > Geology and Resources > 2023 > 32(1): 96-103

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LIU Qiang, LIN Nan, WANG Chang-qi, JIA Li-guo, CHENG Long, GUO Xiao-dong, ZHANG Yan. WETLAND EVOLUTION AND ITS DRIVING FACTORS IN SONGNEN PLAIN[J]. Geology and Resources, 2023, 32(1): 96-103. doi: 10.13686/j.cnki.dzyzy.2023.01.012

Citation:

LIU Qiang, LIN Nan, WANG Chang-qi, JIA Li-guo, CHENG Long, GUO Xiao-dong, ZHANG Yan. WETLAND EVOLUTION AND ITS DRIVING FACTORS IN SONGNEN PLAIN[J]. Geology and Resources, 2023, 32(1): 96-103. doi: 10.13686/j.cnki.dzyzy.2023.01.012

WETLAND EVOLUTION AND ITS DRIVING FACTORS IN SONGNEN PLAIN

1.
Shenyang Center of China Geological Survey, Shenyang 110034, China
2.
Jilin Jianzhu University, Changchun 130018, China
3.
Liaoning Geological and Mineral Institute Co., Ltd., Shenyang 110032, China

Received Date: 07 June 2021

Revised Date: 23 July 2021

Publish Date: 25 February 2023

Abstract

Abstract

As an important part of ecosystem, wetland plays a significant role in maintaining regional ecological security. Based on the Landsat remote sensing image data in 1975, 2000 and 2018, the interpretation data of wetland during the three periods are obtained to analyze the spatiotemporal variation of wetland in Songnen Plain in nearly 50 years with the methods of dynamic degree, difference analysis and transfer matrix, which provides certain theoretical basis for the research and protection of wetland ecosystem in Songnen Plain. The results reveal that the wetland area shows an overall increasing trend from 20 189.81 km² in 1975 to 29 456.79 km² in 2018, manifested by the substantial decrease of natural wetland during 1975-2000 and large-scale increase of constructed wetland during 2000-2018. It is concluded that water storage project, floodwall and wetland reclamation are the main factors causing the decrease of natural wetlands, followed by precipitation reduction, temperature rise and evaporation increase. Driven by the economic benefit, the paddy field reconstruction and expansion mainly contributes to the increase of constructed wetlands.
- wetland /
- dynamic degree /
- transfer matrix /
- spatiotemporal variation /
- Songnen Plain

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References

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