大连海洋大学学报
大連海洋大學學報
대련해양대학학보
Journal of Dalian Fisheries University
2015年
5期
567-572
,共6页
刘文虎%朱小华%张钟哲%张传正%马云龙%龙钰%樊孝鹏%朱泽南%赵瑞祥%任晨悦
劉文虎%硃小華%張鐘哲%張傳正%馬雲龍%龍鈺%樊孝鵬%硃澤南%趙瑞祥%任晨悅
류문호%주소화%장종철%장전정%마운룡%룡옥%번효붕%주택남%조서상%임신열
钱塘江%涌潮%沿海声层析%动力特性
錢塘江%湧潮%沿海聲層析%動力特性
전당강%용조%연해성층석%동력특성
Qiantang River%tidal bore%coastal acoustic tomography system%dynamic characteristics
为了研究钱塘江涌潮的动力特征,于2013年11月5—6日在钱塘江杭州段采用沿海声层析( Coast-al acoustic tomography, CAT)和温盐深仪( Conductivity temperature depth, CTD)进行了涌潮观测试验。两个观测站位分别设置在沿江两岸,站间距为3050 m,试验历时26 h,成功观测到两次涌潮的全过程。结果表明:两次涌潮到来前后,由双向传播时间差计算得到的断面平均流速的变化范围分别为0.39~-1.08、0.31~-0.85 m/s (东向流为正),水位升高的最大幅度分别为1.38、1.14 m;两次涌潮通过观测站位的波速分别为-8.69、-8.43 m/s;观测断面流量的变化范围为-7753.00~3504.49 m3/s,整个试验期间的平均流量为644.14 m3/s;涌潮的弗劳德数介于1.19~1.29之间,表明观测涌潮为波状涌潮;涌潮到达前后能量的损耗率小于0.6%,符合波状涌潮的能量守恒关系。
為瞭研究錢塘江湧潮的動力特徵,于2013年11月5—6日在錢塘江杭州段採用沿海聲層析( Coast-al acoustic tomography, CAT)和溫鹽深儀( Conductivity temperature depth, CTD)進行瞭湧潮觀測試驗。兩箇觀測站位分彆設置在沿江兩岸,站間距為3050 m,試驗歷時26 h,成功觀測到兩次湧潮的全過程。結果錶明:兩次湧潮到來前後,由雙嚮傳播時間差計算得到的斷麵平均流速的變化範圍分彆為0.39~-1.08、0.31~-0.85 m/s (東嚮流為正),水位升高的最大幅度分彆為1.38、1.14 m;兩次湧潮通過觀測站位的波速分彆為-8.69、-8.43 m/s;觀測斷麵流量的變化範圍為-7753.00~3504.49 m3/s,整箇試驗期間的平均流量為644.14 m3/s;湧潮的弗勞德數介于1.19~1.29之間,錶明觀測湧潮為波狀湧潮;湧潮到達前後能量的損耗率小于0.6%,符閤波狀湧潮的能量守恆關繫。
위료연구전당강용조적동력특정,우2013년11월5—6일재전당강항주단채용연해성층석( Coast-al acoustic tomography, CAT)화온염심의( Conductivity temperature depth, CTD)진행료용조관측시험。량개관측참위분별설치재연강량안,참간거위3050 m,시험력시26 h,성공관측도량차용조적전과정。결과표명:량차용조도래전후,유쌍향전파시간차계산득도적단면평균류속적변화범위분별위0.39~-1.08、0.31~-0.85 m/s (동향류위정),수위승고적최대폭도분별위1.38、1.14 m;량차용조통과관측참위적파속분별위-8.69、-8.43 m/s;관측단면류량적변화범위위-7753.00~3504.49 m3/s,정개시험기간적평균류량위644.14 m3/s;용조적불로덕수개우1.19~1.29지간,표명관측용조위파상용조;용조도체전후능량적손모솔소우0.6%,부합파상용조적능량수항관계。
A 26-hour observation of tidal bores was carried out by a coastal acoustic tomography( CAT) system and conductivity temperature depth ( CTD ) in two stations at both sides with a distance of 3050 m diagonally across Qiantang River from 5 to 6 November, 2013 to valuate the dynamic characteristics of tidal bore in Qiantang River, China. The range-averaged current velocities calculated from the reciprocal sound transmission data were changed from 0 . 39 m/s to -1 . 08 m/s before arrival of tidal bore with the maximal water level changes of 1 . 38 m and from 0 . 31 m/s to -0 . 85 m/s after arrival of tidal bore with the maximal water level changes of 1 . 14 m ( the positive ve-locity towards the east). The mean phase speeds of two tidal bores were estimated to be -8. 69 m/s and -8. 43 m/s at the two stations, respectively. During the whole experiment, the volume transport was varied from-7753. 00 m3/s to 3504. 49 m3/s through the section, with a mean of 644. 14 m3/s. The Froude numbers of tidal bores were estimated to be from 1. 19 to 1. 29, indicating that the observed tidal bores were undular bore, with tidal bore energy losses of less than 0. 6%, conforming to energy conservation relations for undular bores.