Flushing time of solutes and pollutants in the central Great Barrier Reef lagoon, Australia

被引:30
作者
Wang, Yonghong [1 ]
Ridd, Peter V.
Heron, Mal L.
Stieglitz, Thomas C.
Orpin, Alan R.
机构
[1] Ocean Univ China, Coll Marine Geosci, Qingdao 266003, Peoples R China
[2] James Cook Univ N Queensland, Sch Math Phys & Informat Technol, Townsville, Qld 4811, Australia
[3] Australian Inst Marine Sci, PMB 3, MC, Townsville, Qld 4810, Australia
[4] NIWA, Wellington, New Zealand
关键词
diffusion coefficient; exchange and diffusion model;
D O I
10.1071/MF06148
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
The flushing time of the central Great Barrier Reef lagoon was determined by using salinity as a tracer and developing both an exchange model and a diffusion model of the shelf exchange processes. Modelling suggests that the cross- shelf diffusion coefficient is approximately constant for the outer half of the lagoon but decays rapidly closer to the coast. The typical outer- shelf diffusion coefficient is similar to 1400 m(2) s(-1), dropping to less than 100 m(2) s(-1) close to the coast. Flushing times are around 40 days for water close to the coast and 14 days for water in the offshore reef matrix.
引用
收藏
页码:778 / 791
页数:14
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