Author: Tatsuaki NakatoPublisher:
ISBN:
Category : Mississippi River
Languages : en
Pages : 52
Book Description
A Review of Sediment-transport Studies of the Great-I and Great II Reaches of the Upper Mississippi River
Author: Tatsuaki NakatoPublisher:
ISBN:
Category : Mississippi River
Languages : en
Pages : 52
Book Description
GREAT I
Author: Great River Environmental Action Team (U.S.)Publisher:
ISBN:
Category : Dredges
Languages : en
Pages : 380
Book Description
Sediment-budget Study for the Upper Mississippi River, GREAT-II Reach
Author: Tatsuaki NakatoPublisher:
ISBN:
Category : Mississippi River
Languages : en
Pages : 128
Book Description
Comprehensive Master Plan for the Management of the Upper Mississippi River Basin
Author: GREAT II
Author: Great River Environmental Action Team (U.S.)Publisher:
ISBN:
Category : Conservation of natural resources
Languages : en
Pages : 164
Book Description
Sediment Response to Large-scale Environmental Change
Author: Richard P. R. PannellPublisher:
ISBN:
Category :
Languages : en
Pages : 150
Book Description
Knowledge about sediment yields is important in developing management strategies for fluvial systems. The effect of sediment must be considered in the design of river structures and in determining water quality for biotic systems. Changes in sediment transport regimes are difficult to understand or predict due to the complexity of factors that influence sediment flux in fluvial systems. Relationships about sediment source, sinks and transport have long been studied and many of these relationships have been quantitatively and qualitatively defined. However, due to the scarcity of long-term sediment records it is often difficult to test these relationships. This study examines one of these long-term suspended sediment records for the Mississippi River at East Dubuque, Illinois from 1943 to 1996. Daily suspended sediment concentrations from the United States Army Corps of Engineers station at East Dubuque were analyzed for the spring and summer months (March - August). Sediment concentrations were analyzed in terms of average concentration during different hydrologic events at the large basin scale. These events included the spring snowmelt runoff (low and high magnitude) and different intensity storm runoff (low, moderate and high). Additionally, peak sediment concentrations during storm runoff were also analyzed. The general trend for all of these analyses suggests a significant decrease in sediment concentrations from the 1940s to the 1990s. The strongest trends are found in high magnitude snowmelt runoff and in high and moderate magnitude storm runoff. Peak concentrations in storm runoff have decreased from about 1000 ppm in the l940s to about 200 ppm in the 1990s. Average concentrations have likewise decreased from about 200 ppm in the 1940s to 100 ppm in the 1990s. Changes in land management practices are identified as being the primary environmental factor influencing sediment concentrations.
Implementation Report for GREAT II Study
Author: Publisher:
ISBN:
Category : Conservation of natural resources
Languages : en
Pages : 120
Book Description
Field Study of Sediment Transport Characteristics of the Mississippi River Near Fox Island (RM-355-6) and Buzzard Island (RM-349-50)
Author: Tatsuaki NakatoPublisher:
ISBN:
Category : Mississippi River
Languages : en
Pages : 108
Book Description
The field study was conducted in order to obtain a better understanding of the flow and sediment-transport mechanisms responsible for the recurrent shoaling that has been experienced in the vicinities of Fox Island (RM-355-6)and Buzzard Island (RM-349-50) in Pool 20 between Keokuk, Iowa, and Canton, Missouri, in the Mississippi River. Three sets of detailed data on transverse and streamwise distributions of flow velocity, suspended sediment discharge, bed-load discharge, bed-material properties, and flow depth were obtained for the high, intermediate, and low river stages during the period between May and September, 1976. The field data were used to establish empirical relationships between the sediment transport rates and hydraulic quantities in the study reaches. Based on the empirical sediment discharge formulas, closures of some side-channels to increase-transport capacity in the main channel of the study reaches have been suggested. (Author).
GREAT II
Author: Publisher:
ISBN:
Category : Conservation of natural resources
Languages : en
Pages : 140
Book Description
Sediment Transport in the Lower Missouri and the Central Mississippi Rivers, June 26 Through September 14, 1993
Author: Robert R. HolmesPublisher:
ISBN:
Category : Floods
Languages : en
Pages : 36
Book Description