咸潮影响下磨刀门水道取淡时机初探  

A preliminary study on fresh water extraction time under influence of salt tide in Modaomen Channel

作　　者：孔兰[1,2] 陈晓宏[1,2] 刘斌 陈栋为[1,2] 杜建[1,2] 

机构地区：[1]中山大学水资源与环境研究中心,广东广州510275 [2]中山大学华南地区水循环和水安全广东普通高校重点实验室,广东广州510275 [3]珠江水利委员会水文局,广东广州510611

出　　处：《水资源保护》2011年第6期24-27,共4页Water Resources Protection

基　　金：国家自然科学基金(50839005);国家重点基础研究发展计划(973)(2010CB428405);中山大学优秀研究生导师逸仙创新人才培养计划(2010)

摘　　要：对磨刀门水道2005—2010年枯水期实测数据进行分析,提出＂最早取淡日＂和＂最后取淡日＂的概念,探讨潮周期最早取淡日与最大潮差日、最后取淡日与最小潮差日关系。结果表明：在枯水期,相对于最大潮差日,最早取淡日呈逐月向后推移的趋势,压咸流量一般应在潮周期最早取淡日之前1 d到达思贤;最后取淡日与最小潮差日关系较复杂,建议根据具体条件,调整压咸时机,压咸流量应在潮周期最后取淡日之前2~3 d到达思贤,并持续2 d左右。Based on analysis of the data measured in dry seasons from 2005 to 2010 in the Modaomen Channel,the concepts of the first day of fresh water extraction and the last day of fresh water extraction are proposed.The relationships between the first day of fresh water extraction and the day with the maximum tidal range,and between the last day of freshwater extraction and the day with the minimum tidal range,are discussed.The results show the following： According to the day with the maximum tidal range,the first day of fresh water extraction has a delaying trend month by month in dry seasons,and the runoff for salinity control should generally arrive at Sixianjiao the day before the first day of fresh water extraction in the tidal period.There is a complex relationship between the last day of fresh water extraction and the day with the minimum tidal range.It is suggested that the salinity control time should be adjusted according to the existing conditions,and the runoff for salinity control should arrive at Sixianjiao two or three days before the last day of fresh water extraction in the tidal period and last about two days.

关 键 词：磨刀门水道 咸潮 潮汐 取淡时机 珠江 

分 类 号：TV213.4[水利工程—水文学及水资源]