Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 98
Book Description
Analysis of Lower Mississippi River Dike Field Performance
Author: Morphologic Effects of Lower Mississippi River Dike Fields
Author: Nelson R. NunnallyPublisher:
ISBN:
Category : Aerial photography in geomorphology
Languages : en
Pages : 80
Book Description
Physical and Hydrologic Characteristics of Aquatic Habitat Associated with Dike Systems in the Lower Mississippi River, River Mile 320 to 610, AHP
Author: Stephen P. CobbPublisher:
ISBN:
Category : Aquatic ecology
Languages : en
Pages : 184
Book Description
Empirical Analysis of Effects of Dike Systems on Channel Morphology of the Lower Mississippi River
Author: Casey M. MaynePublisher:
ISBN:
Category : Channels (Hydraulic engineering)
Languages : en
Pages : 36
Book Description
Environmental and Water Quality Operational Studies. Morphologic Effects of Lower Mississippi River Dike Fields
Author: Nelson R. NunnallyPublisher:
ISBN:
Category :
Languages : en
Pages : 76
Book Description
Dikes are used extensively on large, meandering rivers to help maintain navigation channels. Dike fields alter flow velocities and sedimentation patterns, thereby affecting river morphology and the amount and quality of aquatic habitat. Some investigators have theorized that sedimentation induced by the dike fields constructed on the lower Mississippi, largely since 1960, is altering river morphology and aquatic hatibat in a manner similar to the changes that have been observed in the lower Missouri. Others are of the opinion that dike fields on the lower Mississippi do not typically fill completely with sediment, and the pools they contain have increased the amount of slack-water habitat. Low-water photographs taken in 1962 and 1976 and comprehensive hydrographic surveys done in 1962-64 and 1974-75 were used to measure morphologic changes in diked and undiked reaches. River surface area between river miles 320 and 954 was classified as main channel, secondary channel, slough, chute, or pool. The 1962 and 1976 areas in each category were measured from the photographs. River stage at time of photography averaged about 2 ft (0.6 m) lower in 1976, so 1976 measurements were adjusted for stage differential, based on width mesurements taken from the hydrogaphic surveys. Results were summarized for diked and undiked reaches.
The Improvement of the Lower Mississippi River for Flood Control and Navigation
Author: United States. Mississippi River CommissionPublisher:
ISBN:
Category : Floods
Languages : en
Pages : 636
Book Description
An Analysis of Training Structure Designs in Southwest Pass
Author: Samuel B. HeltzelPublisher:
ISBN:
Category : Mississippi River
Languages : en
Pages : 54
Book Description
Model-prototype Comparison Study of Dike Systems, Mississippi River
Author: John J. FrancoPublisher:
ISBN:
Category : Dikes (Engineering)
Languages : en
Pages : 370
Book Description
In connection with the MRC Potamology Program, movable-bed models studies were conducted of seven of the most complex and troublesome reaches of the Mississippi River to obtain some quick general indications of the effectiveness of plans proposed for the improvement and stabilization of those reaches. Because of the limited time available, the studies were conducted in an existing facility with little or no adjustment of the models and in some cases without a base test. Because of the limited size and shape of the facility available, only a relatively short reach of the river including the problem could be reproduced in each model with little or no overbank areas. The horizontal scales varied with each reach depending on its size and shape and were much smaller with a higher distortion of the linear scales than was considered desirable for studies of this type. An analysis of the model results compared with developments in the river based on an evaluation of considerable prototype data indicated that the types of models used predicted, at least qualitatively, most of the principal trends that actually occurred in the river with the plans tested. The degree of accuracy of the models varied and depended to a considerable extent on the model adjustment, characteristics of the reach, flow conditions, and similarity between plan tested and actual construction.
Floodplain Management Assessment of the Upper Mississippi River and Lower Missouri Rivers and Tributaries
Author: Summary Report : Model-prototype Comparison Study of Dike Systems, Mississippi River
Author: John J. FrancoPublisher:
ISBN:
Category : Dikes (Engineering)
Languages : en
Pages : 92
Book Description