USING A BANK EROSION HAZARD INDEX (BEHI) TO ESTIMATE ANNUAL SEDIMENT LOADS FROM STREAMBANK EROSION IN THE WEST FORK WHITE RIVER WATERSHED

2013 ◽  
Author(s):  
M.A. Van Eps ◽  
S.J. Formica ◽  
T.L. Morris ◽  
J.M. Beck ◽  
A.S. Cotter
Keyword(s):  
Hazard Index ◽  
Bank Erosion ◽  
The West ◽  
River Watershed ◽  
Streambank Erosion ◽  
Erosion Hazard ◽  
White River ◽  
Sediment Loads ◽  
West Fork ◽  
Annual Sediment

scholarly journals Bank instability and erosion problems in Bishnumati River, Kathmandu, Nepal

2006 ◽  
Vol 34 ◽  
pp. 109-116
Author(s):  
Basanta Raj Adhikari ◽  
Naresh Kazi Tamrakar
Keyword(s):  
Riparian Vegetation ◽  
River Sediments ◽  
Hazard Index ◽  
Bank Erosion ◽  
Buffer Zone ◽  
Rooting Depth ◽  
Width Ratio ◽  
Surface Protection ◽  
Erosion Hazard ◽  
Bagmati River

The Bishnumati River, a major tributary of the Bagmati River in the Kathmandu basin, suffers from bank erosion, river instability, and environmental degradation. These processes are responsible for the loss of sediments, modification of river morphology, loss of vegetative buffer zone, and deterioration of stream environment. Bank erosion hazard in the Bishnumati River was assessed at ten different reaches using bank height ratio, ratio of riparian vegetation rooting depth to bank height, rooting density percentage, bank slope, and bank surface protection. Vertical and lateral stability of the river was assessed at four reference segments, namely at Bishnumatigaun, Okhaltar, Mahadevtar, and Tamsipakha, respectively from upstream to downstream. The riverbanks in the Bishnumatigaun segment show fluctuating trends of bank erosion potential from upstream to downstream. All the four segments of the Bishnumati River are vertically unstable and all the segments except the Okhaltar are entrenched. The Tamsipakha and Okhaltar segments have a high risk of lateral shifting, as they possess high values of bank erosion hazard index, meandering width ratio, and width-depth ratio. The Bishnumati river is in a degrading condition and capable of eroding sediments. The main causes of river instability are the excavation of river sediments, encroachment on riverbanks, clearing of riparian vegetation, and canalization.

scholarly journals Bank erosion of the Tŕstie stream: BANCS model predictions vs. real bank erosion

2019 ◽  
Vol 67 (2) ◽  
pp. 121-128
Author(s):  
Zuzana Allmanová ◽  
Mária Vlčková ◽  
Martin Jankovský ◽  
Matúš Jakubis ◽  
Michal Allman
Keyword(s):  
Point Source ◽  
Hazard Index ◽  
Bank Erosion ◽  
Water Stream ◽  
The Real ◽  
Erosion Hazard ◽  
Erosion Prediction ◽  
Model Predictions ◽  
Very High ◽  
Sufficient Precision

Abstract This paper focused on predicting the bank erosion through the Bank Assessment for Non-point source Consequences of Sediment (BANCS) model on the Tŕstie water stream, located in the western Slovakia. In 2014, 18 experimental sections were established on the stream. These were assessed through the Bank Erosion Hazard Index (BEHI) and the Near Bank Stress (NBS) index. Based on the data we gathered, we constructed two erosion prediction curves. One was for BEHI categories low and moderate, and one for high, very high, and extreme BEHI. Erosion predicted through the model correlated strongly with the real annual bank erosion – for low and moderate BEHI, the R2 was 0.51, and for high, very high and extreme BEHI, the R2 was 0.66. Our results confirmed that the bank erosion can be predicted with sufficient precision on said stream through the BANCS model.

scholarly journals Is the BEHI Index (Part of the BANCS Model) Good for Prediction of Streambank Erosion?

2016 ◽  
Vol 64 (4) ◽  
pp. 1107-1114 ◽  
Author(s):  
Zuzana Allmanová ◽  
Matúš Jakubis
Keyword(s):  
Flash Flood ◽  
Hazard Index ◽  
Bank Erosion ◽  
Strong Relationship ◽  
Streambank Erosion ◽  
Erosion Rates ◽  
Stream Bank Erosion ◽  
Stream Bank ◽  
High Precipitation ◽  
In The Beginning

Sedimentation of waterways and reservoirs, decreasing quality of drinking water and costs necessary for maintenance of these objects directly related to streambank erosion. This study provides a tool for water management that can help with estimation parts of a streambank which are prone to erosion. The Bank erosion hazard index (BEHI) part of the BANCS (Bank Assessment for Non‑point source Consequences of Sediment) model is one of the several procedures for assessing streambank erosion condition and potential (Rosgen, 2001). On May 15th 2014 a high precipitation occurred in the watershed of Sestrč torrent, in the eastern part of Chočské vrchy (Sp = 27.64 km2). It reached 102.7 mm per 24 hours. The rainfall resulted in extreme streambank erosion. We started the research of annual stream bank erosion on Sestrč in the beginning of May 2014 and we established 19 experimental sections on the stream. Occurrence of heavy rainfall allowed us to erosion rates after flash flood. The aim of this paper was to verify, if BEHI index can really determine the most vulnerable parts of a banks to erosion. We measured erosion rates Eb (m3/m) using a bank pins and toe pin (Sass, 2011) on each experimental section and evaluated each section by BEHI index (Rosgen, 2001, 2008). The results were statistically verified and confirmed a strong relationship between BEHI and real damage of banks Eb (m3/m) (R: 0.88, R2: 0.78).

scholarly journals Preliminary Map Showing Quaternary Geology of the Mooresville East 7.5-Minute Quadrangle, Indiana

2020 ◽  
Vol 2 ◽  
Author(s):  
Henry Munro Loope ◽  
Robin R. Rupp
Keyword(s):  
Ice Sheet ◽  
River Valley ◽  
The West ◽  
Southern Limit ◽  
Terminal Moraine ◽  
White River ◽  
Eolian Sand ◽  
West Fork ◽  
Sand And Gravel ◽  
Maximum Limit

The Mooresville East 7.5-minute quadrangle is situated near the maximum limit of Wisconsin Episode glacial deposits in northeastern Morgan County. Till and outwash of Wisconsin Episode age and Holocene alluvium are the dominant surficial materials in the quadrangle. Wisconsin Episode eolian sand, loess, and colluvium are also present, with eolian sand and colluvium being adjacent to the West Fork White River valley and loess blanketing Wisconsin Episode till and outwash. Holocene (post-glacial) alluvium is found in the West Fork White River and White Lick Creek valleys and tributaries. Mississippian Borden Group bedrock controls many aspects of the surficial geology of the southeastern sector of the quadrangle. For much of this area, bedrock controls the topography and is less than 20 ft below the ground surface. It is mantled on the summits and shoulders of interfluves mainly by Wisconsin till and minor amounts of sand and gravel (outwash) and eolian sand. The depth to bedrock (Borden Group) is greater along the trend of the modern West Fork White River valley, with depths greater than 100 ft. This bedrock paleovalley is filled with mainly Wisconsin Episode outwash (sand and gravel), and the paleovalley was a major path for meltwater in central Indiana during the Wisconsin Episode, from around 27,000 to 19,000 years ago. The Wisconsin Episode maximum limit lies just outside the quadrangle boundary to the south and east. The Laurentide Ice Sheet reached its maximum limit 24,000 years ago, based on radiocarbon dating of organics within till at the terminal moraine in the adjacent Cope quadrangle. Evidence for a readvance of the ice sheet is found in the Mooresville East quadrangle, which occurred 21,700 years ago; the southern limit of the readvance runs through the central part of the quadrangle, just south of State Highway 144.

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