径流与潮差对钦江河口盐水入侵距离的影响机制  

Mechanisms of the runoff and tidal impacting on the distance of saltwater intrusion in the Qinjiang River Estuary

作　　者：郑华 刘洁[1,2] 张文武 肖毅 ZHENG Hua;LIU Jie;ZHANG Wenwu;XIAO Yi(National Inland Waterway Regulation Engineering Research Center,Chongqing Jiaotong University,Chongqing 400074,China;College of River&Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China;CCCC Fourth Navigation Engineering Survey and Design Institute Co.Guangzhou 510290,China)

机构地区：[1]重庆交通大学国家内河航道工程技术研究中心,重庆400074 [2]重庆交通大学河海学院,重庆400074 [3]中交第四航务工程勘察设计院有限公司,广东广州510290

出　　处：《海洋预报》2025年第1期56-63,共8页Marine Forecasts

基　　金：国家重点研发计划(2023YFB2604700);深圳市水务规划设计院股份有限公司重庆分公司土木水利研究生联合培养基地建设项目(JDLHPYJD2020025)。

摘　　要：构建三维数学模型,定量分析不同径流和潮差组合下钦江河口盐水入侵距离。结果表明:盐水入侵距离随径流的增大而减小,随潮差的增大而增大;潮差较小时,盐水入侵距离与径流之间呈线性关系,随着潮差增大,二者之间的非线性关系逐渐增强,满足幂函数y=axn关系。基于非线性多元回归,构建钦江河口盐水入侵距离预测公式。In this paper,a three-dimensional mathematical model was constructed to quantitatively analyze the saltwater intrusion distance in the Qinjiang River Estuary under different combinations of runoff and tidal range.The results show that the change in saltwater intrusion distance was inversely proportional to the change in river runoff and positively proportional to the change in tidal range.Specifically,under conditions of minimal tidal range,a linear correlation is observed between the saltwater intrusion distance and river discharge.Conversely,as the tidal range intensifies,the relationship becomes increasingly nonlinear,conforming to a power function(y=axn).Furthermore,this investigation has yielded a predictive equation for saltwater intrusion distance,derived from nonlinear multiple regression analysis,which has been substantiated through rigorous validation.This formula is poised to aid in the optimization of local water resource allocation and management strategies.

关 键 词：钦江河口 径流潮差 数值模拟 盐水入侵距离 

分 类 号：P731.12[天文地球—海洋科学]