Journal of Coastal Research最新文献_第3页

Comparison of two wave models for Gold Coast, Australia 澳大利亚黄金海岸两种波浪模型的比较

4区地球科学

Journal of Coastal Research Pub Date : 2024-03-29 DOI: 10.2112/jcr-si50-061.1

D. Strauss, R. Tomlinson

{"title":"Comparison of two wave models for Gold Coast, Australia","authors":"D. Strauss, R. Tomlinson","doi":"10.2112/jcr-si50-061.1","DOIUrl":"https://doi.org/10.2112/jcr-si50-061.1","url":null,"abstract":"STRAUSS, D., MIRFERENDESK, H. and TOMLINSON, R., 2007. Comparison of two wave models for Gold Coast, Australia. Journal of Coastal Research, SI 50 (Proceedings of the 9th International Coastal Symposium), 312 – 316. Gold Coast, Australia, ISBN 0749.0208 Managing hazards associated with shoreline responses to extreme events and the provision of safe boating access is an ongoing concern for coastal authorities. The open sandy coastline of Gold Coast city is a wave dominated coast with a highly variable wave climate and a narrow continental shelf thus experiencing substantial variations in long-shore transport rates. Detailed wave transformation information is central to further investigations of sediment transport processes as complex bathymetry associated with trained river entrances and rocky headlands causes localised interruptions to the overall northward littoral drift. Temporal variations in wave energy are driven by a wide range of swell direction and size while spatial variations occur as a result of the strong refraction during particular swell events. This paper presents a comparison of two near shore wave models of the region using MIKE 21 and SWAN. The transformation of waves arriving from offshore is simulated using the models for selected time series of wave parameters. The parameterized boundary conditions are derived from NOAA Wave Watch III global wave model data. Model output is compared with observed data from existing wave recording buoys at Gold Coast Seaway and Point Lookout. The inclusion of wind in the modelling undertaken did not improve the models’ accuracy and winds in excess of 10 ms -1 led to an over-estimation of significant wave height while increasing the processing time. Sheltering of the near-shore site during southerly swell conditions was well-represented by the modelling.","PeriodicalId":51078,"journal":{"name":"Journal of Coastal Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140366542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 37

Coastal morphodynamics and prehistoric human occupation, County Donegal, NW Ireland 爱尔兰西北部多尼戈尔郡的海岸形态动力学与史前人类活动

4区地球科学

Journal of Coastal Research Pub Date : 2024-03-29 DOI: 10.2112/jcr-si50-021.1

J. Knight, H. Burningham

引用次数: 0

Direct Measurement of Bottom Shear Stress under Water Waves 直接测量水波作用下的底部剪应力

4区地球科学

Journal of Coastal Research Pub Date : 2024-03-29 DOI: 10.2112/jcr-si50-205.1

Z. You, B. Yin

引用次数: 11

A Laboratory Study of Dilute Suspension Mud Floc Characteristics in an Oscillatory Diffusive Turbulent Flow 振荡扩散湍流中稀悬浮泥絮凝体特性的实验室研究

4区地球科学

Journal of Coastal Research Pub Date : 2024-03-29 DOI: 10.2112/jcr-si50-207.1

N. Gratiot, A. Manning

{"title":"A Laboratory Study of Dilute Suspension Mud Floc Characteristics in an Oscillatory Diffusive Turbulent Flow","authors":"N. Gratiot, A. Manning","doi":"10.2112/jcr-si50-207.1","DOIUrl":"https://doi.org/10.2112/jcr-si50-207.1","url":null,"abstract":"GRATIOT, N. and MANNING, A. J., 2007. A Laboratory Study of Dilute Suspension Mud Floc Characteristics in an Oscillatory Diffusive Turbulent Flow, SI 50 (Proceedings of the 9th International Coastal Symposium), 1142 – 1146. Gold Coast, Australia, ISSN 0749.0208 To further the understanding of mud flocculation the COSINUS project funded a series of laboratory experiments whereby dilute mud suspensions were sheared (between 3.7 s -1 - about 20 s -1 ) with nominal concentrations ranging from 200-600 mg l -1 , within a Plexiglas tank, using an oscillating grid. The floc properties were then examined using the LabSFLOC instrument. Results showed that for low concentrations of natural Tamar estuary (UK) mud exposed to high shear, the largest flocs were slightly less than the Kolmogorov eddy size of about 220 μm. The high shear resulted in all flocs having settling velocities of only 0.6 mm s -1 . Lowering the shear for the same mud improved flocculation, and raised the macrofloc settling velocity to 1.8 mm s -1 . This translated into macroflocs constituting 64% of the floc mass, and 80% of the mass settling flux. In contrast, low concentrations of natural Gironde mud displayed significantly faster settling macroflocs at each shear increment than Tamar mud, but the largest flocs were of the same order as the Tamar mud flocs. The suspended matter distribution showed the macroflocs only constituted 20-30% of the particulate mass. However, their faster settling rate transformed the low macrofloc mass into 62% of the settling flux. The removal of organic matter from the Gironde mud resulted in few flocs exceeding 125 μm in diameter.","PeriodicalId":51078,"journal":{"name":"Journal of Coastal Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Dynamics and Dispersion in the Coastal Boundary Layer off Coffs Harbour in Eastern Australia 澳大利亚东部科夫斯港沿海边界层的动力学和扩散

4区地球科学

Journal of Coastal Research Pub Date : 2024-03-29 DOI: 10.2112/jcr-si50-158.1

Tim Pritchard, C. Holden, Randall Lee, K. Black, T. Healy

{"title":"Dynamics and Dispersion in the Coastal Boundary Layer off Coffs Harbour in Eastern Australia","authors":"Tim Pritchard, C. Holden, Randall Lee, K. Black, T. Healy","doi":"10.2112/jcr-si50-158.1","DOIUrl":"https://doi.org/10.2112/jcr-si50-158.1","url":null,"abstract":"PRITCHARD, T.R., HOLDEN, C, LEE, R.S., BLACK, K.P. and HEALY, T. 2007. Dynamics and Dispersion in the Coastal Boundary Layer off Coffs Harbour in Eastern Australia. Journal of Coastal Research, SI 50 (Proceedings of the 9th International Coastal Symposium), 848 – 857. Gold Coast, Australia, ISSN 0749.0208 Time series analysis and model simulations defined dynamics of coastal boundary layer formation off Coffs Harbour based on four deployed acoustic Doppler current (ADCP) meters and wind data from Coffs Harbour airport. Variance preserving spectra revealed peak energies at 7.8, 3.9 and 2.5 days plus ~24 and ~12 hours consistent with dominant forcing by winds. At inshore sites the highest energy levels occurred at the surface and decrease uniformly with depth at all frequencies with local peaks centred at exactly 24 hours, corresponding to peak local wind energy. In contrast, offshore sites showed depth dependency in the peak spectral energy with evidence of regional influences and wave-guide effects due to density stratification. Hydrodynamic simulations using the 3-dimensional explicit finite difference model 3DD revealed local bathymetric controls on circulation. A coastal boundary layer, delineated by a shear zone ~2km offshore in the lee of Corambirra Point, south of Coffs Harbour, was associated with formation of transient eddies. Model simulations and independent ADCP data identified 3 dimensional flow structures typified by clockwise rotation of flows down through the water column at all sites except for the quiescent, shallow water site in the headland wake south of Corambirra Point. The area south of Corambirra Point was predisposed to clockwise eddy rotation while offshore flows were generally shore-parallel. Pollutant dispersal was shown to be significantly less within this coastal boundary layer thus highlighting the need to consider effects of coastal boundary layers when locating discharges such as ocean outfalls.","PeriodicalId":51078,"journal":{"name":"Journal of Coastal Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

The value of coastal recreational resources: a case study approach to examine the value of recreational surfing to specific locales 沿海娱乐资源的价值：以案例研究的方法考察休闲冲浪对特定地区的价值

4区地球科学

Journal of Coastal Research Pub Date : 2024-03-29 DOI: 10.2112/jcr-si50-003.1

N. Lazarow

{"title":"The value of coastal recreational resources: a case study approach to examine the value of recreational surfing to specific locales","authors":"N. Lazarow","doi":"10.2112/jcr-si50-003.1","DOIUrl":"https://doi.org/10.2112/jcr-si50-003.1","url":null,"abstract":"LAZAROW, N., 2007. The value of coastal recreational resources: a case study approach to examine the value of recreational surfing to specific locales. Journal of Coastal Research, SI 50 (Proceedings of the 9th International Coastal Symposium), 12 – 20. Gold Coast, Australia, ISSN 0749.0208 Surfing is a major recreational and economic activity involving intimate human interaction with diverse coastal environments and is expanding both in intensity in traditional locations, as well as in reach into new environments often in the developing world. The value of surfing to both Australia’s and the global economy has grown significantly over the past three decades. This combined with the significant growth in participation and rising popularity of surfing and surfing culture in many countries, means that the importance of the economic and social value of surfing to various regions cannot be understated. While there is a growing literature on the value of surfing tourism, especially in the South-East Asian region and of proposed artificial surfing reefs, there is little documented evidence of the value of recreational surfing in more traditional locations such as Australia and the USA, where it has been estimated that over two-million Australians and two-and-a-half million Americans surf on a regular basis. This paper presents findings from a three-year study using proven economic methodologies as well as those from the other social sciences to collect data on the market and non-market value of surfing at two locations in Australia. The findings demonstrate the significant economic, social and cultural importance of surfing amenity to specific locales, including the need to consider any negative impacts on surf breaks and the environment that may occur as a result of development, coastal planning and protection works.","PeriodicalId":51078,"journal":{"name":"Journal of Coastal Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 68

Wave Action on a Mild Sloped Offshore Breakwater for the Protection of a Promenade 用于保护海滨长廊的缓坡近海防波堤上的波浪作用

4区地球科学

Journal of Coastal Research Pub Date : 2024-03-29 DOI: 10.2112/jcr-si50-049.1

W. Al-Nassar, S. Neelamani, K. Al-Banaa, A. Al-Ragum, J. Ljubic

引用次数: 0

Fetch-Limited Barrier Islands of Spencer Gulf, South Australia 南澳大利亚斯宾塞湾的纬度受限屏障岛

4区地球科学

Journal of Coastal Research Pub Date : 2024-03-29 DOI: 10.2112/jcr-si50-168.1

D. A. Lewis, J. Cooper, O.H. Pilkey, A. D. Short

引用次数: 0

Physical Study of the Southern Coastal Waters of the Caspian Sea, off Babolsar, Mazandaran in Iran. 伊朗马赞达兰 Babolsar 附近里海南部沿海水域的物理研究。