Comparing landscape evolution models with quantitative field data at the millennial time scale in the Belgian loess belt

Temme, A.J.A.M.; Peeters, Iris; Buis, E.; Veldkamp, A.; Govers, Gérard

doi:10.1002/esp.2152

Cited by 17 publications

(20 citation statements)

References 49 publications

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“…Goodbred and Kuehl, 1999;Schrott et al, 2003), iii) estimated using numerical sediment flux models (e.g. Temme et al, 2011;Van De Wiel and Coulthard, 2010;Welsh et al, 2009), or iv) a combination of i) to iii) (Hinderer, 2001;Keesstra et al, 2009). During the past two decades, many long-term empirical sediment budget studies profited from new technologies in geochemical sediment source tracing (Belmont et al, 2011;Collins and Walling, 2004;D'Haen et al, 2012; A C C E P T E D M A N U S C R I P T…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Sediment residence time and connectivity in non-equilibrium and transient geomorphic systems

Hoffmann

2015

Earth-Science Reviews

118

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Section: Accepted Manuscriptmentioning

confidence: 99%

Sediment residence time and connectivity in non-equilibrium and transient geomorphic systems

Hoffmann

2015

Earth-Science Reviews

118

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“…Furthermore, the higher the flood water stage, the greater the drag due to vegetation on the floodplains of natural river reaches compared to channelised sections (Table 2). Temme et al, 2011;Keesstra et al, 2005), and thus transport limited. Slower flow rates have an impact on sediment mobilisation and transport in the river.…”

Section: Modelled Impact Of Riparian and Channel Vegetation And Channmentioning

confidence: 99%

Assessing riparian zone impacts on water and sediment movement: a new approach

Keesstra

Kondrlová

Czajka

et al. 2012

Netherlands Journal of Geosciences

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The state of river channels and their riparian zones in terms of geomorphology and vegetation has a significant effect on water and sediment transport in headwater catchments. High roughness in natural rivers due to vegetation and geomorphological attributes generate drag on flowing water. This drag will slow water discharge, which in turn influences the sediment dynamics of the flow. The impacts of changes in the management of rivers and their riparian zone (either by catchment managers or river restoration plans) impacts both up-as well as downstream reaches, and should be assessed holistically prior to the implementation of these plans.To assess the river's current state as well as any possible changes in geomorphology and vegetation in and around the river, effective approaches to characterise the river are needed. In this paper, we present a practical approach for making detailed surveys of relevant river attributes. This methodology has the benefit of being both detailed -describing river depth, width, channel morphology, erosive features and vegetation typesbut also being practical in terms of time management. This is accomplished by identifying and describing characteristic benchmark reaches (typical sites) in detail against which the remainder of the river course can be rated. Using this method, a large river stretch can be assessed in a relatively short period while still retrieving high quality data for the total river course. In this way, models with high data requirements for assessing the condition of a river course, can be parameterised without major investments on field surveys.In a small headwater catchment (23 km 2 ) in southwestern Poland, this field methodology was used to retrieve data to run an existing model (HEC-GeoRAS) which can assess the impact of changes in the riparian and channel vegetation and channel management on sedimentation processes and stream flow velocity. This model determines the impact of channel morphology and in-channel and riparian vegetation on stream flow and sediment transport. Using four return periods of flooding (2, 10, 20 and 100 years), two opposing channel management / morphology scenarios were run; a natural channel and a fully regulated channel. The modelling results show an increase in the effect of riparian vegetation / geomorphology with an increase in return period of the modeled peak discharge. More natural channel form and increased roughness reduces the stream flow velocity due to increasing drag from flow obstructions (vegetation and channel morphological features). The higher the flood water stage, the greater the drag due to vegetation on the floodplains of natural river reaches compared to channelised sections. Slower flow rates have an impact on sediment mobilisation and transport in the river.

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“…Coulthard, 2001;Willgoose, 2005;Codilean et al, 2006;Bishop, 2007;Tucker and Hancock, 2010;Temme et al, 2011a;Refice et al, 2012). Coulthard, 2001;Willgoose, 2005;Codilean et al, 2006;Bishop, 2007;Tucker and Hancock, 2010;Temme et al, 2011a;Refice et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Coupled numerical–analytical approach to landscape evolution modeling

Goren

Willett

Herman

et al. 2014

Earth Surf Processes Landf

157

193

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The Earth's topography is shaped by surface processes that operate on various scales. In particular, river processes control landscape dynamics over large length scales, whereas hillslope processes control the dynamics over smaller length scales. This scale separation challenges numerical treatments of landscape evolution that use space discretization. Large grid spacing cannot account for the dynamics of water divides that control drainage area competition, and erosion rate and slope distribution. Small grid spacing that properly accounts for divide dynamics is computationally inefficient when studying large domains. Here we propose a new approach for landscape evolution modeling that couples irregular grid‐based numerical solutions for the large‐scale fluvial dynamics and continuum‐based analytical solutions for the small‐scale fluvial and hillslope dynamics. The new approach is implemented in the landscape evolution model DAC (divide and capture). The geometrical and topological characteristics of DAC's landscapes show compatibility with those of natural landscapes. A comparative study shows that, even with large grid spacing, DAC predictions fit well an analytical solution for divide migration in the presence of horizontal advection of topography. In addition, DAC is used to study some outstanding problems in landscape evolution. (i) The time to steady‐state is investigated and simulations show that steady‐state requires much more time to achieve than predicted by fixed area calculations, due to divides migration and persistent reorganization of low‐order streams. (ii) Large‐scale stream captures in a strike‐slip environment are studied and show a distinct pattern of erosion rates that can be used to identify recent capture events. (iii) Three tectono‐climatic mechanisms that can lead to asymmetric mountains are studied. Each of the mechanisms produces a distinct morphology and erosion rate distribution. Application to the Southern Alps of New Zealand suggests that tectonic advection, precipitation gradients and non‐uniform tectonic uplift act together to shape the first‐order topography of this mountain range. Copyright © 2014 John Wiley & Sons, Ltd.

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Comparing landscape evolution models with quantitative field data at the millennial time scale in the Belgian loess belt

Cited by 17 publications

References 49 publications

Sediment residence time and connectivity in non-equilibrium and transient geomorphic systems

Sediment residence time and connectivity in non-equilibrium and transient geomorphic systems

Assessing riparian zone impacts on water and sediment movement: a new approach

Coupled numerical–analytical approach to landscape evolution modeling

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