scholarly journals Yield Erosion Sediment (YES): A PyQGIS Plug-In for the Sediments Production Calculation Based on the Erosion Potential Method

Geosciences ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 324
Author(s):  
Rocco Dominici ◽  
Salvatore Larosa ◽  
Antonio Viscomi ◽  
Luca Mao ◽  
Rosanna De Rosa ◽  
...  
Keyword(s):  
Sediment Yield ◽  
Final Stage ◽  
Catchment Area ◽  
Potential Method ◽  
Sediment Production ◽  
Yield Value ◽  
Basin Scale ◽  
Gis Environment ◽  
Production Calculation ◽  
Python Programming

The Erosion Potential Method is a model for qualifying the erosion severity and estimating the total annual sediment yield of a catchment. The method includes a diverse set of equations, which are influenced by different factors such as geology, morphology, climate and soil use. This study describes a PyQGIS YES plug-in, which allows a semiautomatized use of the Erosion Potential Method in Geographic Information System (GIS) environment. In detail, we developed a plug-in using Python programming language that is made up of a series of operations allowing one to estimate sediment production through a wizard procedure. The first stage consists of data preprocessing and involves: (i) loading of the layers (e.g., geological map); (ii) spatial selection of the catchment area; (iii) elaboration of loaded layers (e.g., clipping). During the second stage, the user assigns a relative coefficient to each factor either by selecting a preloaded value from bibliographic sources or by inserting a value inferred from field observations and data. The third stage includes the addition of rainfall and temperature values loaded as: average values, point shapefiles (the plug-in calculates the average monthly values) or tables (the plug-in creates the linear regression depending on altitude). During the final stage, the plug-in executes the equation of EPM Model obtaining the sediment yield value at basin scale. Additionally, the user can use the “squared cell” method choosing the appropriate option in the setting dialogue of the plug-in. This method divides the catchment area in a regularly-spaced grid which allows one to carry out the distribution map of the sediment production during the final stage.

Modern sediment yield compared to geologic rates of sediment production in a semi-arid basin, New Mexico: assessing the human impact

2004 ◽  
Vol 29 (11) ◽  
pp. 1359-1372 ◽  
Author(s):  
Allen C. Gellis ◽  
Milan J. Pavich ◽  
Paul R. Bierman ◽  
Eric M. Clapp ◽  
Amy Ellevein ◽  
...  
Keyword(s):  
New Mexico ◽  
Human Impact ◽  
Sediment Yield ◽  
Modern Sediment ◽  
Sediment Production ◽  
Semi Arid

scholarly journals Holocene Sediment Production in Lillooet River Basin, British Colombia: A Sediment Budget Approach

2007 ◽  
Vol 45 (1) ◽  
pp. 45-57 ◽  
Author(s):  
Peter Jordan ◽  
Olav Slaymaker
Keyword(s):  
Sediment Yield ◽  
Debris Flows ◽  
Sediment Budget ◽  
Sediment Supply ◽  
Volcanic Complex ◽  
Minor Importance ◽  
The Holocene ◽  
Sediment Production ◽  
Clastic Sediment ◽  
Holocene Sediment

ABSTRACTA sediment budget approach is used to investigate the sources, storage, and yield of clastic sediment in Lillooet River watershed, in the southern Coast Mountains. The 3150 km2basin is heavily glacierised, and includes a Quaternary volcanic complex which has been active in the Holocene. The sediment yield has been determined from the rate of advance of the delta at the basin outlet. The floodplain of the main river valley is aggrading as the delta advances, and probably has been through most of the Holocene. Major sediment sources in the basin include glaciers and Neoglacial deposits, debris flows, and landslides in the Quaternary volcanic complex. Soil and bedrock creep, bank erosion of Pleistocene glacial deposits, and sediment from logging and agriculture are probably of minor importance. Estimates of sediment production from these sources explain only about half the observed clastic sediment yield plus the rate of valley aggradation. The unexplained sediment production may be associated with paraglacial sediments exposed by glacial retreat from the nineteenth century Neoglacial maximum; alternatively the frequency of occurrence of intermediate scale debris flows and landslides has been seriously underestimated. Sediment supply is highly episodic over time scales of centuries to thousands of years. Major factors in the temporal pattern of Holocene sediment supply are periods of volcanism, large landslides, the retreat of glaciers from the Neoglacial maximum, and recent river engineering works.

scholarly journals A review of the measurement of sediment yield in different scales

2005 ◽  
Vol 58 (3) ◽  
pp. 257-265 ◽  
Author(s):  
José Carlos de Araújo ◽  
Donald W. Knight
Keyword(s):  
Spatial Resolution ◽  
Measurement Technique ◽  
Sediment Yield ◽  
Catchment Area ◽  
Review Paper ◽  
Graphical Representation ◽  
State Of The Art ◽  
Measurement Techniques ◽  
Annual Average ◽  
Global Data

The present review paper has the objective of presenting and briefly discussing the state-of-the-art papers on sediment yield (SY) measurement. About 80 publications are referred to, representing all continents, and more than 30 countries. It is observed that SY measurement technique is a much stronger function of temporal than of spatial resolution. Annual average SY data of 364 catchments are summarized. Global data presents no trend concerning catchment area and the same behavior is observed for the continents, except for Africa, which presents a consistent decrease of SY with increasing area. A graphical representation of the spatial and temporal applicability of the different SY measurement techniques is shown.

scholarly journals Scenario modelling of basin-scale, shallow landslide sediment yield, Valsassina, Italian Southern Alps

2005 ◽  
Vol 5 (2) ◽  
pp. 189-202 ◽  
Author(s):  
J. C. Bathurst ◽  
G. Moretti ◽  
A. El-Hames ◽  
A. Moaven-Hashemi ◽  
A. Burton
Keyword(s):  
Sediment Yield ◽  
Shallow Landslide ◽  
Southern Alps ◽  
Sediment Supply ◽  
Channel Network ◽  
Landslide Occurrence ◽  
Sediment Yields ◽  
Basin Scale ◽  
Modest Reduction

Abstract. The SHETRAN model for determining the sediment yield arising from shallow landsliding at the scale of a river catchment was applied to the 180-km2 Valsassina basin in the Italian Southern Alps, with the aim of demonstrating that the model can simulate long term patterns of landsliding and the associated sediment yields and that it can be used to explore the sensitivity of the landslide sediment supply system to changes in catchment characteristics. The model was found to reproduce the observed spatial distribution of landslides from a 50-year record very well but probably with an overestimate of the annual rate of landsliding. Simulated sediment yields were within the range observed in a wider region of northern Italy. However, the results suggest that the supply of shallow landslide material to the channel network contributes relatively little to the overall long term sediment yield compared with other sources. The model was applied for scenarios of possible future climate (drier and warmer) and land use (fully forested hillslopes). For both scenarios, there is a modest reduction in shallow landslide occurrence and the overall sediment yield. This suggests that any current schemes for mitigating sediment yield impact in Valsassina remain valid. The application highlights the need for further research in eliminating the large number of unconditionally unsafe landslide sites typically predicted by the model and in avoiding large overestimates of landslide occurrence.

scholarly journals Water Erosion and Sediment Transport in an Ungauged Semiarid Area: The Case of Hodna Basin in Algeria

2021 ◽  
pp. 439-454
Author(s):  
Omar Djoukbala ◽  
Mahmoud Hasbaia ◽  
Oussama Benselama ◽  
Boutaghane Hamouda ◽  
Salim Djerbouai ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Sediment Yield ◽  
Water Erosion ◽  
Sediment Yields ◽  
Alternative Approach ◽  
Yield Values ◽  
Gis Environment ◽  
High Yields ◽  
Basin Region ◽  
Flat Zone

AbstractThis study aims to estimate the eroded and transported sediment yields from the The Hodna basin (26,000 km2) situated in central Algeria by two approaches. In the first model, the data of the gauged subbasins are extrapolated to the ungauged areas based on the homogeneity of factors that influence the water erosion-sediment transport process. In this approach, the specific eroded and transported sediment yield in the Hodna basin is estimated to be 425 t/km2/yr. In an alternative approach, the eroded yield is estimated by mapping erosion using the (RUSLE) in a GIS environment. The obtained results show a high eroded sediment yield of approximately 610 t/km2/yr.The observed difference between the results of the two approaches can be explained by the amount of sediment that is eroded but is not transported by runoff.These two methods show high eroded and transported sediment yield values in the Hodna basin region; these high yields may seriously threaten the central flat zone with progressive deposition.

scholarly journals Comparison of sediment rating curves and sediment yield in subbasins of the Itacaiúnas River Watershed, Eastern Amazon

RBRH ◽  
2021 ◽  
Vol 26 ◽  
Author(s):  
Marcio Sousa da Silva ◽  
Rosane Lopes Cavalcante ◽  
Pedro Walfir Martins e Souza Filho ◽  
Renato Oliveira da Silva Júnior ◽  
Paulo Rógenes Pontes ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Sediment Yield ◽  
High Water ◽  
Water Levels ◽  
Tropical Rivers ◽  
River Watershed ◽  
Sediment Production ◽  
Power Equation ◽  
Suspended Sediment Concentrations ◽  
Rating Curves

ABSTRACT Understanding the hydrosedimentological dynamics of tropical rivers is a challenge in the Amazon due to its remote and difficult-to-access areas. This study was based on data collected from 16 hydrosedimentological control sections in the 6 subbasins that make up the Itacaiúnas River Watershed (IRW), with 4 annual campaigns (high water levels, rising water levels, falling water levels, low water levels) between 2015 and 2019, with the aim of constructing and comparing sediment rating curves and sediment yield. The data at the mouth of the IRW revealed that the rainy season is responsible for 93% of liquid discharges (Q) with an average of 1460.88 m3/s and for 98% of suspended sediment discharges (SSQ) with an average of 5864.15 tons/day. Suspended sediment concentrations (SSCs) are low to moderate (50 to 150 mg/l). The curves encompassing all the data showed R2 values (0.92 to 0.99) greater than the curves with only the values of the rainy or dry season, indicating a good fit of the power equation to the SSQ and Q data for all sections studied. Higher values of coefficients a and b show areas of greater sediment production and deforestation, as well as areas with new sources of sediment and preserved forest.

SOURCES OF THE BASIN COMPONENT OF THE SEDIMENT YIELD ON THE SMALL RIVER IN THE FOOTHILL-LOWLAND ZONE OF THE BLACK SEA COAST OF THE CAUCASUS (USING THE EXAMPLE OF THE TSANYK RIVER)

2018 ◽  
Vol 12 (7-8) ◽  
pp. 62-74 ◽  
Author(s):  
N. N. IVANOVA ◽  
V. N. GOLOSOV ◽  
A. S. TSYPLENKOV ◽  
YU. S. KUZNETSOVA ◽  
D. V. BOTAVIN
Keyword(s):  
Black Sea ◽  
Sediment Yield ◽  
Catchment Area ◽  
River Channel ◽  
Small River ◽  
The Black Sea ◽  
The Caucasus ◽  
Sediment Removal ◽  
Black Sea Coast ◽  
Sea Coast

Тhis study aims to evaluate features of the formation and sources of the basin component of the sediment yield during flash floods. Measuring campaigns were conducted in the weakly disturbed section of the Tsanyk River basin, located in the Greater Sochi area in the foothill-lowland zone of the Caucasus Black Sea coast. We used a set of field and calculation methods, including sediment dating with application of 137Cs, pin method, Yang's method, erosion modeling and others techniques for determining the rate of denudation and deposition processes. We investigated the processes of local and long-distance sediment movement. It was established that the rate of creep is 2-2.2 cm/year, the intensity of scree processes varies depending on the rock types in the range 1-3.5 cm/year. The processes of sheet erosion and linear erosion contribute to the movement of part of the eroded material from the catchment area to the river channel. Four types of slopes and slope catchments are distinguished according to the features of a sediment delivery from the catchment area to the river channel. The average annual sedimentation rate in the gully fan is amounted to 2.3 cm/year since 1986. At the same time, on the basis of studying the accumulative deposits of the gully fan, including the content of the 137Cs isotope in the different layers, it was established that the main sources of sediments are material produced by gully erosion, scree processes and slopes settling. 5-6 episodes of catastrophic sediment removal occurred in this particular slope catchment for 30-year period. The ratio between a sediment removal from the slope catchments to the river channel and the measured sediment yield in the Tsanyk River during the rain floods of low repeatability makes it possible to state that the basin component of sediment yield is at least 75% of the total. Information about the ratio of slopes and slope catchments of various types within the small river basins of the subtropical belt of the Black Sea coast of the Caucasus should be taken into account when calculating engineering structures for protecting infrastructure facilities from the impact of flash floods or mudflows.

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