Exploring the spatiotemporal evolution of bottomland in Dongting Lake based on multisource remote sensing

doi:10.6046/zrzyyg.2023298

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Abstract

To explore the spatiotemporal evolution of the bottomland in Dongting Lake since the middle stage of the Republic of China, this study examined the historical topographic maps and aerospace remote sensing data concerning the study area for over 10 time periods since the 1930s. Based on remote sensing image interpretation, statistical data analysis, and historical comparison, this study analyzed the temporal variations in the bottomland area of Dongting Lake in various periods to infer the corresponding spatial distributions of the bottomland. The results show that the spatial development of the bottomland in Dongting Lake was primarily characterized by the rapidly advancing delta at the mouth of the east branch of the Ouchi River and Piaowei Islet in East Dongting Lake, the alluvial deposits along the Caowei and Songzhu rivers in the north of South Dongting Lake, and the “Jiangnan Grassland” landscape formed by the bottom uplift of Qili and Muping lakes. The bottomland area in Dongting Lake expanded from 1 622.17 km² in 1 938 to 1 962.28 km² in 2018, coupled with the 980.96 km² of reclaimed high bottomland, suggesting a net increase of 1 321.07 km². In terms of spatial distribution, the bottomland area exhibited an undulating trend rather than a continuous increase. It manifested a significant expansion from 1938 to 1948 and 1958 to 1998 but a slow shrinkage from 1948 to 1958 and 1998 to 2018. Overall, the results of this study provide objective data for preserving lakeshore ecosystems and biodiversity and serving ecological restoration and environmental conservation in the Yangtze River basin.

Keywords Dongting Lake area bottomland evolution temporal variation multisource remote sensing technology

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P237

Issue Date: 09 May 2025

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	Shuchen YU
	Luo QIU
	Qiuhua HE
	Xiaoyan JIN
	Jiabao LI
	Deqing YU

Cite this article:

Shuchen YU,Luo QIU,Qiuhua HE, et al. Exploring the spatiotemporal evolution of bottomland in Dongting Lake based on multisource remote sensing[J]. Remote Sensing for Natural Resources, 2025, 37(2): 228-234.

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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2023298 OR https://www.gtzyyg.com/EN/Y2025/V37/I2/228

Fig.1 Geographic location of Dongting Lake and distribution of modern bottom land

Fig.2 Spatial distribution of bottomland during major historical periods since 1938

Tab.1 Changes in area of bottomland in Dongting Lake since 1938

Fig.3 Temporal change in proportion of bottomland area since 1938

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