登入選單

返回Google圖書搜尋

Gas-rich Sediment and Coastal Wetland Loss in Louisiana

M. D. Thompson

出版	Argonne National Lab., 1993
URL	http://books.google.com.hk/books?id=tBvpjgEACAAJ&hl=&source=gbs_api

註釋

High rates of wetland loss in southern Louisiana provide the impetus for examining the role that trapped, biogenic gases play in regulating subsidence of coastal areas. A significant cause for wetland loss in this region is relative sea-level rise produced by sediment-volume reduction. Dewatering, grain reorientation and packing, and oxidation of organic-rich sediments are thought to be the main processes for volume loss. It is argued that natural and anthropogenic causes for sediment degasification play a critical role in sediment-volume reduction. Compressional wave velocities were measured at 34 sites in both the abandoned (Holocene) and modern parts of the Mssissippi Delta. A low-frequency source (