Modeling hydromorphological processes in a mountainous basin using a composite mathematical model and ArcSWAT

Kaffas, Konstantinos; Hrissanthou, Vlassios; Sevastas, Stefanos

doi:10.1016/j.catena.2017.11.017

Cited by 33 publications

(19 citation statements)

References 45 publications

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“…According to Cui et al [17], the accumulation of fine sediment in reservoirs and the potential impact of sediment flushing constitute even a cause for dams to be removed in some cases. It is true that in several cases, dams are decommissioned or even abandoned due to sedimentation (Nizam Sagar dam, Katteri dam, Bhakra dam (India), Sanmenxia dam (China), Peligre dam (Haiti), Melton dam, Umberumberka dam (Australia), and others [18]). This is, obviously, not attributed to manufacturing defects but to failed prediction of the sediment discharge at the location of the dam, prior to its construction, in other words, to the underestimation of soil erosion and sediment discharge of basins drained by dams.…”

Section: Definition Of the Problemmentioning

confidence: 99%

Introductory Chapter: Soil Erosion at a Glance

Kaffas¹,

Hrissanthou²

2019

Soil Erosion - Rainfall Erosivity and Risk Assessment

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Section: Definition Of the Problemmentioning

confidence: 99%

Introductory Chapter: Soil Erosion at a Glance

Kaffas¹,

Hrissanthou²

2019

Soil Erosion - Rainfall Erosivity and Risk Assessment

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“…It is a quite complex model with significant input data demands. However, the basic components can be readily obtained and are relatively simple [18]. Essential inputs consist of weather data, Digital Elevation Model (DEM), soil, and land occupation maps [55].…”

Section: The Swat Model: Basins and Impoundmentsmentioning

confidence: 99%

Assessing the Impact of Man–Made Ponds on Soil Erosion and Sediment Transport in Limnological Basins

Sayah¹,

Nedjaï²,

Kaffas³

et al. 2019

Preprint

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The impact of ponds on basins has recently started to receive its well–deserved scientific attention. In this study, pond–induced impacts on soil erosion and sediment transport were investigated at the scale of the French Claise basin. In order to determine erosion and sediment transport patterns under current conditions, the CORINE erosion and SWAT models were used. The impact of ponds on the studied processes was revealed by means of land cover change scenarios, using ponded versus pondless inputs. Results show that under current conditions (pond presence), 12.48% of the basin corresponds to no–erosion risk zones (attributed to the dense pond network), while 65.66% corresponds to low–erosion risk, 21.68% to moderate–erosion risk and only 0.18% to high–erosion risk zones. The SWAT model revealed that ponded sub–basins correspond to low sediment yields areas, in contrast to the pondless sub–basins, which yield appreciably higher erosion rates. Under the alternative scenario, erosion risks shifted to 1.12%, 0.52%, 76.8% and 21.56% for no, low, moderate and high–erosion risks, respectively, while the sediment transport pattern of the Claise completely shifted to higher sediment yield zones. This approach solidifies ponds as powerful man–induced modifications to hydro/sedimentary processes.

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“…River damming produces alterations on the natural river functionality, both in the water discharge, as well as in the sediment transport and connectivity [1,2]. In particular, large dams [3] are estimated to trap more than 99% of the sediments entering the reservoir [4].…”

Section: Introductionmentioning

confidence: 99%

A New Mass-Conservative, Two-Dimensional, Semi-Implicit Numerical Scheme for the Solution of the Navier-Stokes Equations in Gravel Bed Rivers with Erodible Fine Sediments

Tavelli

Piccolroaz

Stradiotti

et al. 2020

Water

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The selective trapping and erosion of fine particles that occur in a gravel bed river have important consequences for its stream ecology, water quality, and overall sediment budgeting. This is particularly relevant in water bodies that experience periodic alternation between sediment supply-limited conditions and high sediment loads, such as downstream from a dam. While experimental efforts have been spent to investigate fine sediment erosion and transport in gravel bed rivers, a comprehensive overview of the leading processes is hampered by the difficulties in performing flow field measurements below the gravel crest level. In this work, a new two-dimensional, semi-implicit numerical scheme for the solution of the Navier-Stokes equations in the presence of deposited and erodible sediment is presented, and tested against analytical solutions and performing numerical tests. The scheme is mass-conservative, computationally efficient, and allows for a fine discretization of the computational domain. Overall, this makes the model suitable to appreciate small-scales phenomena such as inter-grain circulation cells, thus offering a valid alternative to evaluate the shear stress distribution, on which erosion and transport processes depend, compared to traditional experimental approaches. In this work, we present proof-of-concept of the proposed model, while future research will focus on its extension to a three-dimensional and parallelized version, and on its application to real case studies.

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Modeling hydromorphological processes in a mountainous basin using a composite mathematical model and ArcSWAT

Cited by 33 publications

References 45 publications

Introductory Chapter: Soil Erosion at a Glance

Introductory Chapter: Soil Erosion at a Glance

Assessing the Impact of Man–Made Ponds on Soil Erosion and Sediment Transport in Limnological Basins

A New Mass-Conservative, Two-Dimensional, Semi-Implicit Numerical Scheme for the Solution of the Navier-Stokes Equations in Gravel Bed Rivers with Erodible Fine Sediments

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Modeling hydromorphological processes in a mountainous basin using a composite mathematical model and ArcSWAT

Cited by 33 publications

References 45 publications

Introductory Chapter: Soil Erosion at a Glance

Introductory Chapter: Soil Erosion at a Glance

Assessing the Impact of Man&ndash;Made Ponds on Soil Erosion and Sediment Transport in Limnological Basins

A New Mass-Conservative, Two-Dimensional, Semi-Implicit Numerical Scheme for the Solution of the Navier-Stokes Equations in Gravel Bed Rivers with Erodible Fine Sediments

Contact Info

Product

Resources

About

Assessing the Impact of Man–Made Ponds on Soil Erosion and Sediment Transport in Limnological Basins