连云港外航道沿程含沙量计算研究  

Calculation of sediment concentration along approach channel to Lianyungang Port

作　　者：张玮[1] 刘杰[1] 肖天葆 孙宏杰[1] 杨松[1] ZHANG Wei LIU Jie XIAO Tian-bao SUN Hong-jie YANG Song(College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China Administration Committee of Guangdong Maoming Binhai New Area, Maoming 525000, China)

机构地区：[1]河海大学港口海岸与近海工程学院,南京210098 [2]广东茂名滨海新区管理委员会,茂名525000

出　　处：《水道港口》2017年第2期115-119,共5页Journal of Waterway and Harbor

基　　金：国家高技术研究发展计划(2012AA112509)

摘　　要：在淤泥质海岸,含沙量是影响航道回淤的关键因素,而外海含沙量资料往往难以获得。针对连云港海域外海含沙量资料缺乏的现状,根据已有的7万t级、15万t级和25万t级航道回淤实测资料,利用潮流数学模型,结合规范推荐的两种淤泥质海岸航道回淤预测公式,反算了外航道沿程含沙量,并对计算结果进行了对比分析。结果表明,根据航道回淤资料反算的含沙量大小与分布较为合理,且不同航道等级条件下反算的含沙量结果较为接近,说明这种计算方法可靠、计算结果稳定;该方法仅适用于海床冲淤平衡条件下外航道含沙量的推算;刘家驹公式与曹祖德公式计算的含沙量结果均能满足精度要求。The suspended sediment concentration （SSC）, a key factor in predicting the siltation intensity in approach channels of muddy coast, is very difficult to be measured in open seas. Due to the limited data of SSC in Lianyungang sea area, according to the observed silting data in approach channels of 70 000 DWT, 150 000 DWT and 250 000 DWT, a mathematic model of tidal current and two formulas recommended by the Code of Hydrology for Sea Harbor for predicting the siltation intensity were used to calculate the SSC along the approach channel, and then the computation results were compared. The research shows that the size and distribution of the SSC calculated by the observed silting data are reasonable and the SSC of different levels are very close, which prove that the calculation method is reliable and the computation results are stable. This method is only suitable for the prediction of SSC along the outer channel on the seabed in the balance of erosion and deposition. The calculation results by Liu Jiajv formula and Cao Zude formula all meet the accuracy requirements.

关 键 词：淤泥质海岸 航道 含沙量 经验公式 数学模型 

分 类 号：TV142[水利工程—水力学及河流动力学] O242.1[理学—计算数学]