文章摘要
林 军,章守宇,龚甫贤.象山港海洋牧场规划区选址评估的数值模拟研究:水动力条件和颗粒物滞留时间[J].上海海洋大学学报,2012,21(3):452-459
象山港海洋牧场规划区选址评估的数值模拟研究:水动力条件和颗粒物滞留时间
Numerical study on site selection evaluation of the marine ranching planning zone in Xiangshan Bay:hydrodynamic conditions and particle residence time
  
DOI:
中文关键词: 象山港  海洋牧场  选址评估  数值模拟  水动力  滞留时间
英文关键词: Xiangshan Bay  marine ranching  site selection evaluation  numerical modeling  hydrodynamics  residence time
基金项目:国家公益性行业(农业)科研专项经费项目(201003068)
作者单位
林 军 上海海洋大学 海洋科学学院 
章守宇 上海海洋大学 海洋科学学院 
龚甫贤 上海海洋大学 海洋科学学院 
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中文摘要:
      应用成熟的海洋数值模式ECOM si (Estuarine Coastal Ocean Model semi implicit)用于评估宁波象山港海洋牧场规划海域(白石山 中央山 铜山西北侧)的水动力条件,并耦合一个拉格朗日质点追踪模块研究了规划区海域水体和颗粒物在象山港内的滞留时间。结果表明,海洋牧场规划区底层流速基本符合小于0.8 m/s的最高流速限制,综合考虑规划区附近的水深条件,建议将人工鱼礁投放区设定在规划区西北侧海图水深6~10 m的范围内,可使表底层最大流速分别限制在1.2 m/s和0.6 m/s以下。海洋牧场规划区内释放的质点追踪结果表明,90%左右的颗粒物质在象山港狭湾内的存留时间大于2个月。以海洋牧场核心区周边5 km和10 km范围为判定依据时,质点释放后前30 d,离开海洋牧场核心区的质点比例增长较快,30 d后,基本达到稳定。质点释放1个月到2个月时间内,位于核心区5 km范围内的质点维持在30%~40%左右,位于核心区10 km范围内的质点则维持在80%左右。
英文摘要:
      A numerical ocean model, ECOM si (Estuarine Coastal Ocean Model semi implicit) was applied to evaluate hydrodynamic conditions of the marine ranching planning zone (northwestern side of Baishi Mountain, Central Mountain and Tong Mountain) in Xiangshan Bay, Ningbo, coupled with a 3 D Lagrangian particle tracking module to study the residence time of water and particles in this planning zone. Result shows that the bottom current velocity in the marine ranching planning zone generally complies with a restriction of the highest velocity of 0.8 m/s. We take the depth around the planning zone into account synthetically, and suggest that the artificial reefs should be located at the northwestern side of the planning zone within a range of depth from 6 to 10 meters, since in this region surface and bottom current velocities could be limited under 1.2 m/s and 0.6 m/s respectively. The tracking result of particles released within the marine ranching planning zone indicates that about 90% of particles remained west to the fjord of Xiangshan Bay for more than two months. In earlier 30 days after particles were released, the proportion of particles leaving marine ranching core zone increased rapidly, and it became steady after the 30 days. During the periods of first and second months after particles released, particles that remained within a scope of 5 km in the core zone were around 30% to 40%, and within a scope of 10 km, were around 80%.
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