【摘要】：采用長江口4條入海汊道3個月的水文測驗資料,研究長江口的鹽度分布格局和鹽淡水混合情況,運用分層系數(shù)法和混合比法對長江口實測鹽度數(shù)據(jù)進行分析。結(jié)果表明:北支汊道的鹽度最高,洪、枯變幅大,全年均為垂向均勻混合型;南支3條汊道鹽度從高到低依次為南槽、北槽、北港;鹽淡水混合強度從高到低依次為南槽、北槽、北港,這與長江口北港分流量大于北槽、北槽分流量大于南槽的格局相對應(yīng);枯季的混合強度大于洪季,大潮的混合強度大于小潮。鹽淡水的混合強度呈周期性變化,漲急前后垂向混合程度最大,漲潮的混合強度高于落潮時的混合強度。
[Abstract]:The distribution pattern of salinity and the mixing of salt and fresh water in the Yangtze River Estuary were studied by using the hydrological data of 4 inlet channels in the Yangtze River Estuary for 3 months. The measured salinity data of the Yangtze River Estuary were analyzed by stratification coefficient method and mixing ratio method. The results show that the salinity of the northern branch is the highest, the flood and the dry range are large, and all the year round are vertical uniform mixing type, the salinity of the three branches of the southern branch is the south channel from high to low, the north port, and the intensity of salt and fresh water mixing from high to low is the southern channel. The north channel and the north port correspond to the pattern that the flow of the north port in the Yangtze Estuary is greater than that of the north trough, and the flow of the north channel is larger than that of the south trough, and the mixing intensity of the dry season is greater than that of the flood season, and the mixing intensity of the spring tide is greater than that of the low tide. The mixing strength of salt and fresh water varies periodically, and the vertical mixing intensity of salt and fresh water is the largest before and after rising rapidly, and the mixing intensity of high tide is higher than that of falling tide.
【作者單位】： 河海大學(xué)港口海岸與近海工程學(xué)院;
【分類號】：TV148.4;P731.2

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