期刊文献+

ANALYSES OF RECENT GEOMORPHIC EVOLUTION OF GARGATHY INLET, EASTERN SHORE OF VIRGINIA, U. S. A.

ANALYSES OF RECENT GEOMORPHIC EVOLUTION OF GARGATHY INLET, EASTERN SHORE OF VIRGINIA, U. S. A.
下载PDF
导出
摘要 Uargathy Inlet is a small natural tidal inlet in the northern region ol the Virginia Darner island chain. It is 100 m wide with a throat cross-sectional area of 384m2 and an average tidal prism of 6.47 x 106 m3. The inside drainage system is 7.8 km long and 2.2km wide. The main channels comprise 5.8% of the area, shallow lagoons 19.8%, and Spartina marshes 74.4% in 1970. Over the period 1851 - 1989 the inlet narrowed and migrated northward while maintaining a weakening downdrift offset. The nearby barrier island coastline’s rapid retreat (average rate 4.78m /a, 138 years retreat 660 m) was accompanied by back barrier channel and lagoon filling and a decrease in intertidal water volume which was probably the main reason for the entrance narrowing. The northward migration of the inlet was related to the dredging of the Inside Passage (before 1949) and the breaching of southern Metompkin Island (since 1957) connected with the inlet system. This altered the interior tidal circulation and likely shifted Uargathy Inlet is a small natural tidal inlet in the northern region ol the Virginia Darner island chain. It is 100 m wide with a throat cross-sectional area of 384m2 and an average tidal prism of 6.47 x 106 m3. The inside drainage system is 7.8 km long and 2.2km wide. The main channels comprise 5.8% of the area, shallow lagoons 19.8%, and Spartina marshes 74.4% in 1970. Over the period 1851 - 1989 the inlet narrowed and migrated northward while maintaining a weakening downdrift offset. The nearby barrier island coastline's rapid retreat (average rate 4.78m /a, 138 years retreat 660 m) was accompanied by back barrier channel and lagoon filling and a decrease in intertidal water volume which was probably the main reason for the entrance narrowing. The northward migration of the inlet was related to the dredging of the Inside Passage (before 1949) and the breaching of southern Metompkin Island (since 1957) connected with the inlet system. This altered the interior tidal circulation and likely shifted northward the divide between the drainage areas of Gargathy Inlet and Metompkin Inlet. Bypassing littoral sediment from north to south, downdrift local transport reversal, and onshore welding of swash bars formed a downdrift offset. Very strong coastal storms, particularly those of 1933 and 1962, played important roles in changing inlet geometry.
出处 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 1992年第1期9-22,共14页 中国海洋湖沼学报(英文版)
关键词 geomorphic evolution Gargathy INLET geomorphic evolution , Gargathy Inlet
  • 相关文献

参考文献30

  • 1Hayes,M. O.Barrier island morphology as a function of tidal and wave regime. Barrier Islands . 1979
  • 2Hayes, M,T. Kana.Terrigeneous Clastic Depositional Environment. Tech. Rept. 11, CRD, Dept. Geology, Univ. South Carolina . 1976
  • 3Inman, D. L,R. Dolan.The outer banks of North Carolina: Budget of sediment and inlet dynamics along a migrating barrier system. Jour. Coastal Research . 1989
  • 4NOAA.1989 Tide Tables, East Coast of North and South America. . 1989
  • 5Reynolds,W. J.Ebb-tidal delta dynamics for a tide-dominated barrier island. Hydrodynamics and Sediment Dynamics of Tidal Inlets . 1988
  • 6Rice, T. E,A. Niedoroda,A. Pratt.Coastal processes and geology, Virginia barrier islands. Virginia Coastal Reserve Study: Ecosystem Description . 1976
  • 7Sorenson,R.M.The Corps of Engineers general investigation of tidal inlets. Proc. 17th Coastal Engineering Conference . 1980
  • 8U. S. Army Corps of Engineers Norfolk District.Flood Plain Information, Coastal Flooding, Town of Wachapreague, Virginia. . 1971
  • 9Zhang Qiaomin.Analyses of P-A correlationship of tidal inlets along the coasts of south China. 1987 Proc. Coastal and Port Engineering in Developing Countries . 1987
  • 10C. A. M. King.Beaches and Coasts. . 1972

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部