2020
DOI: 10.1016/j.jhydrol.2020.125617
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Digital Elevation Models for topographic characterisation and flood flow modelling along low-gradient, terminal dryland rivers: A comparison of spaceborne datasets for the Río Colorado, Bolivia

Abstract: Many dryland rivers are terminal systems, with small channels undergoing prominent downstream size reductions before ending on channelless floodplains, in wetlands, or at playa margins. Spaceborne Digital Elevation Models (DEMs) provide potential for assessing subtle topographic and hydrodynamic changes in these low-gradient, low-relief settings, but challenges are posed by limitations in vertical and horizontal accuracy. This study evaluates the use of different spaceborne DEMs for topographic characterisatio… Show more

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Cited by 22 publications
(15 citation statements)
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“…Sediment distribution in a source-to-sink (S2S) system corresponds to linked segments of sediment routing pathways from areas of erosion in the hinterland to areas of deposition in the basin, often embracing the dynamic processes and feedback mechanisms between the autogenic and allogenic forcing conditions that govern sediment dispersal in erosional-depositional systems [1][2][3]5,8,24]. Source-to-sink analysis in a dryland uplift system, however, needs to be implemented, including the characteristics of bedrock and catchment units, sediment transport pathway types and sizes, sedimentary architecture and fluxes, and the proportional range between source-to-sink segments [4,5,9,[36][37][38][39][40]. The major differences in dryland S2S systems are generally affected by landforms and boundary styles in the form of uplift, including (1) source regions-these three systems are mainly supplied by local material sources with various topographic features and drainage system areas; (2) pathways-incised valleys and faulted troughs, the major styles with various scales in different subsystems; and (3) sedimentary systems-alluvial deposits under the control of temporary water flow are mainly developed, showing banded or fan-shaped distributions and independent/overlapping distributary channels.…”
Section: Source-to-sink System Coupling Modelsmentioning
confidence: 99%
See 1 more Smart Citation
“…Sediment distribution in a source-to-sink (S2S) system corresponds to linked segments of sediment routing pathways from areas of erosion in the hinterland to areas of deposition in the basin, often embracing the dynamic processes and feedback mechanisms between the autogenic and allogenic forcing conditions that govern sediment dispersal in erosional-depositional systems [1][2][3]5,8,24]. Source-to-sink analysis in a dryland uplift system, however, needs to be implemented, including the characteristics of bedrock and catchment units, sediment transport pathway types and sizes, sedimentary architecture and fluxes, and the proportional range between source-to-sink segments [4,5,9,[36][37][38][39][40]. The major differences in dryland S2S systems are generally affected by landforms and boundary styles in the form of uplift, including (1) source regions-these three systems are mainly supplied by local material sources with various topographic features and drainage system areas; (2) pathways-incised valleys and faulted troughs, the major styles with various scales in different subsystems; and (3) sedimentary systems-alluvial deposits under the control of temporary water flow are mainly developed, showing banded or fan-shaped distributions and independent/overlapping distributary channels.…”
Section: Source-to-sink System Coupling Modelsmentioning
confidence: 99%
“…However, few modern S2S system analyses have been applied to typical dryland uplifts/mountains, and the quantitative relationships between the S2S segments of a complete uplift/mountain are still unclear. Moreover, the major influencing factors and generic coupling models of the various source morphologies, slope gradients, sediment transport pathway types, and scales of the depositional fans in the dryland uplift system [36][37][38][39][40] must also be further investigated.…”
Section: Introductionmentioning
confidence: 99%
“…As space-based technology progresses, various satellite-based location estimates using remote sensing techniques (optical, microwave and lidar technologies) are delivering continuous maps and data of estimated positions (X, Y, and Z) in the form of digital elevation models (DEMs) [2]. DEMs from space, especially those available freely in the public domain, are a valuable and dependable data source for many scientific endeavors, such as hydrological mapping [3][4][5], extraction of hydrological parameters [6], flood flow mapping [7,8], flood flow modelling, production of orthoimageries [9], topographic characterization [10], ecological modelling [11], and fault kinematics and facet geomorphology [12]. The DEM is critical for tracking the movement and spread of dust plumes [13].…”
Section: Introductionmentioning
confidence: 99%
“…Reaches of the middle and lower Rí o Colorado, as well as the neighbouring Rí o Capilla, have been subject to previous hydrological, geomorphological and sedimentological investigations (e.g. Donselaar et al, 2013;Li et al, 2014aLi et al, , 2014bLi et al, , 2015Li et al, , 2018Li et al, , 2019Li et al, , 2020Li et al, , 2021Li and Bristow, 2015;van Toorenenburg et al, 2018). Similar to some other dryland river systems worldwide (e.g.…”
Section: Introductionmentioning
confidence: 99%