海洋通报
海洋通報
해양통보
MARINE SCIENCE BULLETIN
2015年
1期
14-20
,共7页
珠江磨刀门河口%盐度变化%水文气象要素%偏相干谱估计%频率响应特征
珠江磨刀門河口%鹽度變化%水文氣象要素%偏相榦譜估計%頻率響應特徵
주강마도문하구%염도변화%수문기상요소%편상간보고계%빈솔향응특정
Modaomen waterway of Pearl River Estuary%salinity change%hydrological and meteorological elements%spectral estimation of partial coherence%frequency response characteristics
以2010年11月-2011年3月磨刀门水道挂定角、联石湾、竹排沙、平岗和竹银5个测站的盐度、马口水文站流量、三灶站潮位和竹银站的主流向风速为基本数据，应用偏相干谱估计方法分析了各测站盐度变化对潮汐、流量和风的频率响应。经验诊断分析结果表明：1）马口站入海径流存在准1日、半日、1/4日和1/3日等显著的潮致振荡周期；2）各测站盐度变化与潮汐主要振荡周期并不一致，沿磨刀门水道向上游，潮汐对盐度变化的影响递减，竹银站盐度可作为潮汐直接作用下咸潮上溯的平均上限位置；3）消除潮汐和径流的影响后风对盐度变化的作用明显加强；4）各测站盐度变化对潮汐、流量与风的响应过程存在时间超前或滞后但无特定规律，说明磨刀门水道盐度变化过程十分复杂。
以2010年11月-2011年3月磨刀門水道掛定角、聯石灣、竹排沙、平崗和竹銀5箇測站的鹽度、馬口水文站流量、三竈站潮位和竹銀站的主流嚮風速為基本數據，應用偏相榦譜估計方法分析瞭各測站鹽度變化對潮汐、流量和風的頻率響應。經驗診斷分析結果錶明：1）馬口站入海徑流存在準1日、半日、1/4日和1/3日等顯著的潮緻振盪週期；2）各測站鹽度變化與潮汐主要振盪週期併不一緻，沿磨刀門水道嚮上遊，潮汐對鹽度變化的影響遞減，竹銀站鹽度可作為潮汐直接作用下鹹潮上溯的平均上限位置；3）消除潮汐和徑流的影響後風對鹽度變化的作用明顯加彊；4）各測站鹽度變化對潮汐、流量與風的響應過程存在時間超前或滯後但無特定規律，說明磨刀門水道鹽度變化過程十分複雜。
이2010년11월-2011년3월마도문수도괘정각、련석만、죽배사、평강화죽은5개측참적염도、마구수문참류량、삼조참조위화죽은참적주류향풍속위기본수거，응용편상간보고계방법분석료각측참염도변화대조석、류량화풍적빈솔향응。경험진단분석결과표명：1）마구참입해경류존재준1일、반일、1/4일화1/3일등현저적조치진탕주기；2）각측참염도변화여조석주요진탕주기병불일치，연마도문수도향상유，조석대염도변화적영향체감，죽은참염도가작위조석직접작용하함조상소적평균상한위치；3）소제조석화경류적영향후풍대염도변화적작용명현가강；4）각측참염도변화대조석、류량여풍적향응과정존재시간초전혹체후단무특정규률，설명마도문수도염도변화과정십분복잡。
Frequency response of salinity changes of five stations ( Guadingjiao, Lianshiwan, Zhupaisha, Pinggang, and Zhuyin) to the tides ( Sanzao) , river discharges ( Makou) and mainstream direction wind speeds ( Zhuyin) along the Modaomen waterway of the Pearl River Estuary was analyzed by using the data between November, 2010 to March, 2011 and the partial coherency spectral estimation. The empirical diagnostic analysis results showed:1) There were significant tide-induced oscillation cycles of the runoff discharged at Makou station with the quasi diurnal, the semidiurnal, a quarter of the day and a third day;2) The oscillation period of salinity changes of five stations did not agree with the main tidal oscillation period. And the effect of tides on the salinity changes decreased progressively upstream along the Modaomen waterway. The salinity of Zhuyin station could be the average limit position of saltwater under the direct tidal action;3) The wind effect on salinity changes significantly strengthened after eliminating the influence of tide and runoff;4) The response of salinity at each station to the tides, runoff and wind processes existed temporal lead or lag with no specific rules, which indicated that the salinity changes in Modaomen waterway were very complicate.
