Investigation of Impacts to Tributaries from Missouri River Channel Degradation PDF Download
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Author:
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Category : Channels (Hydraulic engineering)
Languages : en
Pages :
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Book Description
This report is to supplement the biennial report, Investigation of Channel Degradation - Missouri River, Gavins Point Dam to Platte River confluence, which updates Voume IV, Supporting Technical Report, Missouri River Degradation. Volume IV is part of the August 1981 Review Report of the Water Resource Management Study for Metropolitan Sioux City and Missouri River, Iowa, Nebraska, and South Dakota.
Author:
Publisher:
ISBN:
Category : Channels (Hydraulic engineering)
Languages : en
Pages :
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Book Description
This report is to supplement the biennial report, Investigation of Channel Degradation - Missouri River, Gavins Point Dam to Platte River confluence, which updates Voume IV, Supporting Technical Report, Missouri River Degradation. Volume IV is part of the August 1981 Review Report of the Water Resource Management Study for Metropolitan Sioux City and Missouri River, Iowa, Nebraska, and South Dakota.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309162033
Category : Science
Languages : en
Pages : 164
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Book Description
Historically, the flow of sediment in the Missouri River has been as important as the flow of water for a variety of river functions. The sediment has helped form a dynamic network of islands, sandbars, and floodplains, and provided habitats for native species. Further downstream, sediment transported by the Missouri and Mississippi Rivers has helped build and sustain the coastal wetlands of the Mississippi River delta. The construction of dams and river bank control structures on the Missouri River and its tributaries, however, has markedly reduced the volume of sediment transported by the river. These projects have had several ecological impacts, most notably on some native fish and bird species that depended on habitats and landforms created by sediment flow. Missouri River Planning describes the historic role of sediment in the Missouri River, evaluates current habitat restoration strategies, and discusses possible sediment management alternatives. The book finds that a better understanding of the processes of sediment transport, erosion, and deposition in the Missouri River will be useful in furthering river management objectives, such as protection of endangered species and development of water quality standards.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309170036
Category : Science
Languages : en
Pages : 188
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Book Description
The Missouri River Ecosystem: Exploring the Prospects for Recovery resulted from a study conducted at the request of the U.S. Environmental Protection Agency and the U.S. Army Corps of Engineers. The nation's longest river, the Missouri River and its floodplain ecosystem experienced substantial environmental and hydrologic changes during the twentieth century. The context of Missouri River dam and reservoir system management is marked by sharp differences between stakeholders regarding the river's proper management regime. The management agencies have been challenged to determine the appropriate balance between these competing interests. This Water Science and Technology Board report reviews the ecological state of the river and floodplain ecosystem, scientific research of the ecosystem, and the prospects for implementing an adaptive management approach, all with a view toward helping move beyond ongoing scientific and other differences. The report notes that continued ecological degradation of the ecosystem is certain unless some portion of pre-settlement river flows and processes were restored. The report also includes recommendations to enhance scientific knowledge through carefully planned and monitored river management actions and the enactment of a Missouri River Protection and Recovery Act.
Author: Reuben Heine
Publisher:
ISBN:
Category :
Languages : en
Pages : 386
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Book Description
This research uses multivariate analysis to spatially assess channel network rejuvenation following a base-level drop. It develops and tests a GIS model to estimate the spatial distribution of channel incision with a focus on the loess-dominated tributary watersheds of the Missouri River in Nebraska and Iowa. In this homogenous-geologic setting, it was found that a multiplicative combination of base-level drop and a flow-length parameter (position ratio) performed better than any other tested combination of variables, explaining 73% of the variance in observed upstream streambed-elevation change and produced an overall predication sums of squares error of less than 0.4 meters. The position ratio method requires only a digital elevation model. This permits model extrapolation using map algebra to all stream sites responding to a base-level drop. This study focused on the degraded tributaries of the Missouri River from Gavins Point Dam (RM 811.4) to the confluence with Platte River (RM 594.60). The 280 km study reach of the Missouri River is shown to have degraded its bed by 0 to 4 meters since the closure of the Gavins Point Dam in 1954. The tributary streams to the Missouri River were selected because they provided several fundamental constraints on the problem including: (1) these loess-dominated stream channels were free from aggradational feedbacks common to coarser-grained alluvial channels, (2) complete rejuvenation of fluvial systems was documented to occur in less than 30 years, (3) an extensive historical record of streambed elevations has been assembled for these streams, (4) known sources of base-level drop were identifiable both in time and location, and (5) varied environmental conditions exist related to basin size, slope, flow lengths and landuse patterns. While the statistical linkage between base-level lowering and upstream-streambed lowering was an important finding, it was also expected. The two most significant contributions made by this study were (1) the creation of a new spatial model for the assessment of change in streambed elevation for networks responding to a base-level drop and (2) the production of a GIS layer (map) of expected tributary incision due to Middle Missouri River degradation.
Author:
Publisher:
ISBN:
Category : Flood control
Languages : en
Pages : 350
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Author: Thomas J. Pokrefke
Publisher:
ISBN:
Category : Habitat (Ecology)
Languages : en
Pages : 288
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 666
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 80
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Author: William W. Sayre
Publisher:
ISBN:
Category : Missouri River
Languages : en
Pages : 80
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Book Description
Proceedings of a workshop held in Omaha, Nebraska, 22-25 January, 1978. Edited by W.W. Sayre and J.F. Kennedy. Iowa Conservation Commission. IIHR Report No. 215. Iowa Institute of Hydraulic Research, the University of Iowa, Iowa City, Iowa.
Author: Thomas N. Keefer
Publisher:
ISBN:
Category : Channels (Hydraulic engineering).
Languages : en
Pages : 96
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Book Description
