Riverbank Erosion--A Case Study

Hagerty, D. J.; Sharifounnasab, M; Spoor, M. F.

doi:10.2113/gseegeosci.xx.4.411

Cited by 9 publications

(4 citation statements)

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“…A common application is the use of multiple-date photographs, often in combination with maps and(or) field surveys, to determine historical changes in channel position (Daniel, 1971;Lapointe and Carson, 1986;Philip et al, 1989;Gilvear and Harrison, 1991). Several studies have used aerial photographs to assess bank erosion (Scott, 1982;Hagerty et al, 1983;Kondolf and Curry, 1986;Odgaard, 1987) and to estimate changes in channel width (Schumm and Lichty, 1963;Bradley and Smith, 1984;Martinson, 1984;Andrews, 1986). Other studies have used aerial photographs to study such topics as channel area (Hallberg et al, 1979), channel sinuosity (Schumm, 1963), channel vegetation (Williams and Wolman, 1984), and channel habitat and morphology (MacConnell and Niedzwiedz, 1979;Gilvear et al, 1995).…”

Section: Use Of Aerial Photographs and Stream-gage Information In Rivmentioning

confidence: 99%

CHANNEL STABILITY DOWNSTREAM FROM A DAM ASSESSED USING AERIAL PHOTOGRAPHS AND STREAM‐GAGE INFORMATION¹

Juracek¹

2000

J American Water Resour Assoc

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Section: Use Of Aerial Photographs and Stream-gage Information In Rivmentioning

confidence: 99%

CHANNEL STABILITY DOWNSTREAM FROM A DAM ASSESSED USING AERIAL PHOTOGRAPHS AND STREAM‐GAGE INFORMATION¹

Juracek¹

2000

J American Water Resour Assoc

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“…Although some innovative techniques based on photogrammetry recently have been used to assess the contribution of river bank erosion to sediment budgets (Barker et al, 1997;Barker, 2000), most studies that have assessed river bank erosion processes or 60 P. COUPER, T. STOTT AND I. MADDOCK rates to date have relied upon measurements of either direct or historical rates of river channel change or on the use of erosion pins (e.g. Slaymaker, 1972;Hill, 1973;Gardiner, 1983;Hagerty et al, 1983;Murgatroyd and Ternan, 1983;Lawler and Leeks, 1992;Ashbridge, 1995;Lawler et al, 1997;1999).…”

Section: Introductionmentioning

confidence: 99%

Insights into river bank erosion processes derived from analysis of negative erosion‐pin recordings: observations from three recent UK studies

Couper¹,

Stott²,

Maddock³

2002

Earth Surf Processes Landf

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Recent studies of river bank erosion in three catchments in the UK have been characterized by the persistent occurrence of negative erosion-pin results. The cause of these negative recordings is considered with reference to field data from the Afon Trannon, Nant Tanllwyth and River Arrow, and to a laboratory study of freeze-thaw and desiccation processes. It seems that there is potential for, and in some cases evidence of, a number of different circumstances that generate negative results, but none of these alone is sufficient to explain all incidents. Factors considered include: deposition of sediment during high flows; soil fall from the upper parts of the bank on to lower erosion pins; loosening of the soil surface and expansion/contraction of the soil mass with fluctuations in temperature and moisture content; movement of the erosion-pin within the bank and human interference. Each has its own implications for the use of erosion pins.Further issues arise when including negative data in subsequent data analysis, and it is demonstrated that attempts to correlate erosion rates with hydro-meteorological data in order to ascertain causes of erosion will be influenced by the way in which negative data are handled. It is thus suggested that any study of river bank erosion using erosion pins should state whether or not negative data were obtained, and if so, how they were included in data analysis. Failure to include this information could lead to comparison of mean erosion rates that reflect bank processes very differently.The studies presented here offer a clear example of the value of 'anomalous' field data: results which do not appear to fit expected patterns can reveal as much about the processes in operation as those that do.

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“…The pegs were wooden stakes (50 x 50 x 300 mm) driven into the ground. A similar approach was adopted by Hooke (1979Hooke ( , 1980, Thorne & Tovey (1981) and Hagerty et al (1983). The approach enabled some quantitative measure of material removal or deposition at a site to be readily determined.…”

Section: Fig 4 Modified Distribution Of Major Soil Groups In the Nigmentioning

confidence: 99%

Bank erosion and protection in the Niger delta

Abam¹

1993

Hydrological Sciences Journal

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A field study of erosion processes and local responses was carried out at representative sites of major soil groups in the Niger delta. The soils at these sites varied widely from plastic silty clays to silty sands of varying relative densities. Information on soil type, stratification and state of compaction together with tidal velocity distribution and pool level variation in river channels was used to establish predominant mechanics of erosion. The influence of vegetation on bank stability is dependent on the stage of growth of the vegetation, the relative location of the vegetation in the bank area, the bank steepness and its height. Although bamboo trees and raphia palms on lower parts of channel banks impede flow, thus aiding sedimentation, they may not be effective in checking bank recession. The difficulty of achieving an effective bank protection with raphia palms can be overcome by an improvement in bank protection design layout along the line of a filter which preferentially allows water to escape from the mesh. An upper bank protection may not be effective if low bank areas are scoured as this results in overhangs which readily fail. Consequently, bank protection measures must cover the entire bank profile. Erosion littorale et la protection des rives dans le delta du NigerRésumé Une étude de terrain des processus érosifs et de leurs effets locaux a été menée en divers sites du delta du Niger, représentatifs de différents types de sols, allant des argiles plastiques aux sables vaseux de densités variées. Les principaux processus d'érosion ont été identifiés grâce aux données concernant les types de sols, leur stratification et leur état de compaction, la distribution des vitesses des courants de marée et la variation des niveaux dans les différents biefs. L'influence de la végétation sur la stabilité des berges dépend du niveau de développement de cette végétation, de sa localisation sur les rives, de la pente et de la hauteur de celles ci. Bien que les bambous et les raphias situés à l'aval des biefs ralentissent le courant, favorisant ainsi la sédimentation, ils peuvent s'avérer incapable de prévenir le recul des berges. La protection des berges pourrait être améliorée grâce à un filtre permettant le passage préférentiel de l'eau à travers ses mailles. Des mesures visant à protéger le sommet des berges peuvent se révéler inefficaces si leur base est affouillée, provoquant des surplombs instables. Les mesures de protection des berges doivent donc concerner celles ci dans leur totalité.

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Riverbank Erosion--A Case Study

Cited by 9 publications

References 0 publications

CHANNEL STABILITY DOWNSTREAM FROM A DAM ASSESSED USING AERIAL PHOTOGRAPHS AND STREAM‐GAGE INFORMATION¹

CHANNEL STABILITY DOWNSTREAM FROM A DAM ASSESSED USING AERIAL PHOTOGRAPHS AND STREAM‐GAGE INFORMATION¹

Insights into river bank erosion processes derived from analysis of negative erosion‐pin recordings: observations from three recent UK studies

Bank erosion and protection in the Niger delta

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Riverbank Erosion--A Case Study

Cited by 9 publications

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CHANNEL STABILITY DOWNSTREAM FROM A DAM ASSESSED USING AERIAL PHOTOGRAPHS AND STREAM‐GAGE INFORMATION1

CHANNEL STABILITY DOWNSTREAM FROM A DAM ASSESSED USING AERIAL PHOTOGRAPHS AND STREAM‐GAGE INFORMATION1

Insights into river bank erosion processes derived from analysis of negative erosion‐pin recordings: observations from three recent UK studies

Bank erosion and protection in the Niger delta

Contact Info

Product

Resources

About

CHANNEL STABILITY DOWNSTREAM FROM A DAM ASSESSED USING AERIAL PHOTOGRAPHS AND STREAM‐GAGE INFORMATION¹

CHANNEL STABILITY DOWNSTREAM FROM A DAM ASSESSED USING AERIAL PHOTOGRAPHS AND STREAM‐GAGE INFORMATION¹