基于多波束地形测量的珠三角网河区典型河道形态特征分析

Analysis of Typical River Morphological Characteristics in the Pearl River Delta Network Area Based on Multibeam Bathymetry

河道地形监测和演变趋势是影响河道防洪安全和水资源综合利用的重要因素。为摸清河道水下地形变化,基于多波束测深系统对佛山市平洲水道白蛇漩段近10年水下地形进行监测,采用河道深槽变化、冲淤量计算、重要河段横断面及边坡对比方法分析监测结果,提出河道整治建议。结果表明,白蛇漩深槽1~5所处位置冲刷风险高,2014年~2018年河道冲刷且左岸边坡下切程度较大。研究结论可为河道险工险段识别和河道治理提供决策依据。

Riverbed topography monitoring and its evolution trends are critical factors affecting flood safety and the comprehensive utilization of water resources.To understand the changes in the underwater topography of the river,multibeam echosounder systems were used to monitor the underwater topography of the Bai She Xuan section of the Pingzhou Waterway in Foshan City over nearly a decade.The monitoring results were analyzed using methods such as channel depth changes,scour and deposition volume calculations,and comparisons of cross-sections and slopes in key sections of the river.Recommendations for river management were proposed based on these analyses.The results indicate that sections 1 to 5 of the Bai She Xuan deep channel have a high risk of scour,with significant left bank slope incision occurring between 2014 and 2018.Th'e conclusions of this study can provide a basis for decision-making regarding the identification of dangerous sections and river management.