Morphodynamics of the Mississippi River: Final Report (and) Appendix C: Data Files on Compact Disc (CD-ROM)

ELECTRONIC FILE CHARACTERISTICS: 492 files; Data, Hypertext and Macro Programming Text; MS Excel. PHYSICAL DESCRIPTION: 1 computer laser optical disc (CD-ROM); 4 3/4 in.; 167 MB. SYSTEMS DETAIL NOTE: IBM-clone PC-compatible. ABSTRACT: The Lower Mississippi River, extending from Cairo, Illinois to the Gulf of Mexico, annually transports approximately 170 million tonnes of sediment. Historically, the quantity and calibre of sediment derived from catchment erosion have been affected by changes in land-use and management. For example, soil erosion increased during the 19th and early 20% centuries due to settlement by Europeans and this may have elevated catchment sediment supply to the Mississippi River, while more recently the supply of sediment from tributaries is known to have decreased markedly as a result of river engineering and management Specifically, the construction of large dams as part of the Mississippi River and Tributaries (MR&T) Project has trapped sediment that would otherwise have been supplied to the Mississippi, particularly by the Missouri River. Marked changes have also occurred in the extent of eroding bankline along the Mississippi and these must have reduced the input of sediment derived from this source. For example, during the last three decades, a sustained construction program of bank revetments and dikes has produced a stable alignment. Report (28 p.) is accompanied by CD-ROM with Appendix C data files. This report is based on the earlier project Sediment Transport in the Lower Mississippi River, which is included within this report and on the CD-ROM. See also: ADB266990. Data compilation and validation is described on page 11 of report. A standardised format in MS Excel was devised and all data were transferred by using the Macro programming tool within Excel. The database is fully described in Appendix C, on page 54 of the report. For individual articles, see