| 摘要: |
| 利津站的水文资料显示,黄河流入渤海的平均年径流量为4.93×1010m3,输人海中的平均年输沙量为1.34×1012kg(钱意颖等,1993)。黄河的年径流量仅为长江的二十分之一，但其年输沙量却为长江的2.26倍,如此大量的泥沙流入海中,不仅造成了河口区的严重淤积,而且也对口门外滨海大陆架区的海洋生态环境造成了很大的影响。因此研究黄河尾闾不同流路时期黄河冲淡水的分布与变化将有助于了解河口外余流场的分布变化及泥沙运行机制。研究表明,黄河冲淡水的分布变化除了取决于其径流量的变化外,还受到黄河口门变迁的影响。要了解黄河冲淡水分布的变化规律,需要对1855年以来不同流路多年逐月的滨海大陆架区的水文资料进行系统分析,由于资料的限制,本文仅分析钓口河流路和清水沟流路时期黄河冲淡水的季节变化特征。 |
| 关键词: 黄河口、变迁、黄河冲淡水 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院海洋研究所调查研究报告第2319号 |
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| CHANGES OF THE DILUTED WATER DISTRIBUTION CAUSED BY THE FLUVIAL PROCESS OF THE HUANGHE RIVER ESTUARY |
|
Le Kentang
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Institute of Oceanology, Academia Sinica
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| Abstract: |
| The Huanghe River tail (HRT) has changed channels twice since 1964, Diaokouhe Channel (from Jan, 1964 to May, 1976) and the Qingshuigou Channel (from May, 1976 up to now). In the Diaokouhe Channel period, the river tail flowed roughly northward into the Bohaiwan Bay, but since May, 1976, has flowed into the Laizhouwan Bay from the Qingshuigou Channel. The major results of the analysis on the distributional features of the Huanghe River Diluted Water (HRDW) in both periods are presented in this paper as follows. (1) In the Huanghe River (HR) flood season the HRDW exists off the water-running mouth and is different from the Baonan coastal water. The core salinity of the HRDW is less than 27 and its thickness is not greater than 10m. The HRDW salinity at its outer boundary can reach 29.5, with corresponding thicknees not greater than 15m. (2)In the flood season,the behaviours of the HRDW are different not only in the different HRT periods but also in the different stages of the same HRT periods.(3) The extent and direction of the HRDW not only has monthly variations due to the HR’s mean runoff discharge but also reveals a weekly fluctuations owing to the intermittent runoff in the HRT. (4) During the period of the Qingshuigou Channel, generally speaking,the HRDW spreads northeastward in the flood season, but the spreading direction is significantly affected by flood_ebb process, which is to say that the flood tide cause the HRDW to spread to the southeast and the ebb tide to the northeast. |
| Key words: DILUTED WATER DISTRIBUTION CAUSED,HUANGHE RIVER ESTUARY,FLUVIAL PROCESS,CHANGES |
