基于一维盐度模型的珠江河网咸潮上溯距离分析  

Saltwater intrusion lengths in the Pearl River networks based on one-dimension salinity model

作　　者：官明开 蒋齐嘉 徐龑文 冯浩川[1] 吴尧[1] 胡煌昊 

机构地区：[1]河海大学,江苏南京210098 [2]四川农业大学,四川雅安625014

出　　处：《水运工程》2016年第11期66-71,共6页Port & Waterway Engineering

摘　　要：建立珠江三角洲河网整体一维水动力、盐度数值计算模型,此模型涵盖了整个珠江三角洲河网区,验证结果良好。在此模型基础上,对2001年枯季和2005年枯季珠江三角洲咸潮上溯情况进行模拟计算,模拟结果表明,0.5‰盐度线在整个河网区域呈现出向右倾斜的"S"形,2005年枯季咸潮平均上溯距离达到了32.4 km,这几乎是2001年枯季的2倍。进一步利用模型模拟4种不同来水情况下的咸潮上溯距离的变化情况,对4种来水流量下的咸潮上溯距离进行分析,发现当上游来水平均流量减少将近0.5倍时,下游8大口门处咸潮上溯平均距离将增加1倍左右。kjA one-dimension hydrodynamic-salinity mathematical calculation model of the Pearl Rivernetworks is established.This model covers the entire river region, and it is verified with good results. Based on thismodel, analysis of the characteristics of saltwater intrusion in the Pearl River Delta in dry seasons of 2001 and 2005has been carried out.The result indicates that the simulated 0. 5 parts per thousand salinity isohaline in the PearlRiver networks displays a shape similar to ＂S＂ and slanting to the right. The saltwater intrusion lengths of 2005intruded far upstream at an average length of 32. 4 km, which is almost twice longer than that in 2001. Fourrepresentative upstream flows are also simulated to analysis the response of the saltwater intrusion lengths todischarges.The result implies that when upstream average flows reduce by 0.5 times, saltwater intrusion lengths atthe eight outlets increase by nearly 1 time.

关 键 词：珠江三角洲河网 一维盐度模型 上游来水 咸潮上溯距离 

分 类 号：TV148.4[水利工程—水力学及河流动力学]