Quantitative Study on Morphological Change Characteristics of Tonle Sap Lake Based on DEM

Huang, Yan and Li, Changwen and Tian, Yifei and Liu, Wu and Zhang, Nan and Wang, Haiyang and Wu, Yue and Feng, Wanting and Yu, Yifan (2024) Quantitative Study on Morphological Change Characteristics of Tonle Sap Lake Based on DEM. Open Journal of Modern Hydrology, 14 (01). pp. 1-13. ISSN 2163-0461

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Abstract

Lake is an important part of the natural ecosystem, and its morphological characteristics reflect the capacity of lake regulation and storage, the strength of material migration, and the characteristics of shoreline development. In most existing studies, remote sensing images are used to quantify the morphological characteristics of lakes. However, the extraction accuracy of lake water is greatly affected by cloud cover and vegetation cover, and the inversion accuracy of lake elevation data is poor, which cannot accurately describe the response relationship of lake landscape morphology with water level change. Therefore, this paper takes Tonle Sap Lake as the research object, which is the largest natural freshwater lake in Southeast Asia. DEM is constructed based on high-resolution measured topographic data, and morphological indicators such as lake area, lake shoreline length, perimeter area ratio, longest axis length, maximum width, shoreline development index, lake shape complexity, compactness ratio and form ratio are adopted to researching the evolution law of high water overflows and low water outbursts quantitatively, and clarifying the variation characteristics of landscape morphology with water level gradient in Tonle Sap Lake. The research results have important theoretical significance for the scientific utilization of Tonle Sap Lake water resources and the protection of the lake ecosystem.

Item Type: Article
Subjects: STM Library > Geological Science
Depositing User: Managing Editor
Date Deposited: 14 Dec 2023 06:39
Last Modified: 14 Dec 2023 06:39
URI: http://open.journal4submit.com/id/eprint/3566

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