北黄海冷水取水位置优选研究

Study on the Water Abstraction Position of North Yellow Sea Cold Water

在黄海冷水综合利用中,最佳取水海域的选取是关键环节。本文基于多年实测温度观测资料,重点分析大连、威海及成山头海域夏季黄海冷水分布特征。综合冷水的核心温度、分布位置、靠陆距离等因素,比选出黄海冷水综合利用最佳取水海域。结果表明:大连海域黄海冷水资源利用条件最佳,取水海域与距离陆地小于10km,冷水团持续时间长,底层水温10℃以下的时间可持续到8月底。成山头海域的黄海冷水利用条件次之,取水海域距离陆地35km,底层冷水可以持续到8月中旬。威海取水条件最差,取水海域距离陆地45km;冷水团持续时间最短,8月中旬底层海水温度升高至11℃。此外,利用温度链连续观测与垂直水温观测,对大连海域冷水的持续时间与垂向结构进行分析,8月底垂向仍存在较强温度跃层,底层温度为10℃,冷水可持续至9月中旬。

In the utilization of Yellow Sea Cold Water(YSCW),the key is selecting the best water abstraction area.Using years of temperature observation data analyzes the distribution characteristics of YSCW in Dalian,Weihai and Chengshantou sea areas.Based on the factors such as the core temperature,distribution of cold water and the distance from the land,the best water abstraction areas can be chosen.The results show that,Dalian sea area was the best choice among the three alternatives,for the distance to land was less than 10 km and bottom cold water temperature below 10℃could last until the late August.Followed by the Chengshantou sea area which the distance to land was 35 km and bottom cold water temperature below 10℃could last until the mid-August.While,Weihai sea area was the last choice,The distance to land was 45 km,and bottom temperature rose to 11℃in mid-August.Furthermore,using the temperature chain observations and vertical temperature observations around Dalian area to analyze lasting time and vertical structure of the cold water,found that there was still a strong vertical thermocline at the end of August,the bottom temperature was 10℃,and the cold water resource was abundant and sustainable until mid-September.