Page 82 - 2022年第53卷第1期

Research on ice concentration in Heilong River based on the UAV low-altitude remote
sensing and OTSU algorithm

1，2 1 1，2 1
WANG Enliang ，HU Shengbo ，HAN Hongwei ，LIU Chengqian
（1. School of Water Conservancy and Civil Engineering，Northeast Agricultural University，Harbin 150030，China
2. Heilongjiang Provincial Key Laboratory of Water Resources and Water Conservancy Engineering in Cold Region，Harbin 150030，China）

Abstract： In order to improve the timeliness and accuracy of ice change information acquisition， this pa⁃
per proposed a new method of extracting ice concentration based on unmanned aerial vehicles remote-sens⁃
ing images and OTSU algorithm. In this study， taking the Mohe section of the Heilong River as the re⁃
search object， firstly， drift ice images in ice flood period were captured by the unmanned aerial vehicles
equipped with a high-resolution sensor in top view. The advantages and disadvantages of four image thresh⁃
old-selection methods were compared and analyzed. According to the features of the original ice grayscale
images， meanwhile， the ice and background were separated by combining with top-hat transformation and
OTSU threshold segmentation. In order to avoid the influence of sunlight and waves，the article adopted ar⁃
ea denoising method，and the results showed that the area denoising method was effective and rapid in re⁃
moving reflective point. A graph showing how ice concentration changed with time had been plotted by ex⁃
tracting the ice concentration based on the ice binary image. The results show that the OTSU algorithm ran
fast and had high segmentation accuracy， which is suitable for the field of ice image segmentation. The
maximum ice concentration was 81.05%，and after an ice jam occurred in the upstream，the monitoring re⁃
sults showed that ice concentration dropped rapidly until the ice jam was lifted， the ice concentration re⁃
turned to 60%. The results were in accord with the situation observed on site. The method proposed in this
paper is accurate and effective，which provides a new technical means for monitoring ice change information.
Keywords： unmanned aerial vehicles； OTSU algorithm； ice concentration；threshold segmentation；top-hat
transformation

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2021 年优秀审稿专家表彰名单

2021 年，在审稿专家、编委及广大作者的共同努力下，《水利学报》的论文学术水平进
一步提升。全年共有 290 位专家参与《水利学报》的审稿，为弘扬他们严谨求实的作风、认真
负责的态度及甘于奉献的精神，编辑部综合考虑审稿专家的审稿数量、审稿质量和审稿时
效，评选出 30 位专家为 2021 年度《水利学报》优秀审稿专家。名单如下（按姓名笔画排序）：

王立成 王进廷 王忠静 韦直林 邓家泉
冯 平 刘春蓁 江春波 纪昌明 李纪人
杨开林 杨建东 张永双 张 翔 陈文学
陈 进 陈凯麒 陈森林 周振民 胡立堂
钟平安 姜乃迁 姚文艺 贾仰文 贾绍凤
徐宗学 郭新蕾 蒋云钟 韩宇平 谢新民

《水利学报》编辑部

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