Estimation of flood inundation duration using multi-source radar remote sensing in Poyang Lake basin

doi:10.7523/j.ucas.2021.0079

Abstract

Abstract: To investigate flood disaster damage at large-scale, it is necessary to propose inundation duration estimation method using multi-source radar remote sensing data. Firstly, Poyang Lake basin flood located in middle of the Yangtze River is taken as study area; and then, multi-temporal radar remote sensing data are collected to extract flood inundation areas using random forest model; moreover, inundation duration is calculated at Poyang Lake basin using the estimation model of inundation duration with multi-temporal inundation areas; finally, the flood disaster assessment is conducted using average inundation duration and relationship of inundation duration and the yield loss degree of rice. The results show that:1) the Kappa coefficients of the flood inundation extracted area are higher than 0.89 and the basin flood inundation lasts 1-44 days; 2) extremely severely flood affected at township scale locate at Nanji, Changzhou, Sanjiao and the most severely flood affected areas mainly locate at Poyang, Lianhu, and Jiaotang. The majority of areas are classified as moderately affected and the assessment results are consistent with the actual disaster damage situation. The proposed inundation duration estimation method has the advantages of large scale monitoring with high frequency, which can provide support for basin flood emergency monitoring and rapid disaster damage assessment.

Key words: inundation duration, multi-source radar remote sensing data, basin flood, flood disaster assessment

CLC Number:

TP79
TV122

ZHANG Ruoxu, LI Xiaotao, JIANG Wei, ZHANG Liping, DENG Qinghai, SONG Xiaoning. Estimation of flood inundation duration using multi-source radar remote sensing in Poyang Lake basin[J]. Journal of University of Chinese Academy of Sciences, 2023, 40(4): 486-495.

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