Paper Info
Title
Bathymetric mapping and estimation of water storage in a shallow lake using a remote sensing inversion method based on machine learning
Abstract
Accurate lake depth mapping and estimation of changes in water level and water storage are fundamental significance for understanding the lake water resources on the Tibetan Plateau. In this study, combined with satellite images and bathymetric data, we comprehensively evaluate the accuracy of a multi-factor combined linear regression model (MLR) and machine learning models, create a depth distribution map and compare it with the spatial interpolation, and estimate the change of water level and water storage based on the inverted depth. The results indicated that the precision of the random forest (RF) was the highest with a coefficient of determination (R (2)) value (0.9311) and mean absolute error (MAE) values (1.13 m) in the test dataset and had high reliability in the overall depth distribution. The water level increased by 9.36 m at a rate of 0.47 m/y, and the water storage increased by 1.811 km(3) from 1998 to 2018 based on inversion depth. The water level change was consistent with that of the Shuttle Radar Topography Mission (SRTM) method. Our work shows that this method may be employed to study the water depth distribution and its changes by combining with bathymetric data and satellite imagery in shallow lakes.
Year
DOI
Venue
2022
10.1080/17538947.2022.2069873
INTERNATIONAL JOURNAL OF DIGITAL EARTH
Keywords
DocType
Volume
Remote sensing inversion, lake bathymetry, Sentinel-2, machine learning (ML), random forest (RF), water storage
Journal
15
Issue
ISSN
Citations 
1
1753-8947
0
PageRank 
References 
Authors
0.34
0
6
Name
Order
Citations
PageRank
Yang Hong112435.87
Hengliang Guo200.68
Wenhao Dai300.34
Bingkang Nie401.01
Baojin Qiao501.35
Liping Zhu602.03