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From hyporheic science to river restoration: the contribution of physically-based hydrological models

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From hyporheic science to river restoration : the contribution of physically-based hydrological models. / Kaser, D.H.; Binley, Andrew; Heathwaite, Louise.

2014. Abstract from AG, San Francisco, United States.

Research output: Contribution to conference - Without ISBN/ISSN Abstract

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@conference{74abcfa579f6424a94f670cac82ebe6b,
title = "From hyporheic science to river restoration: the contribution of physically-based hydrological models",
abstract = "River managers need practical tools to promote appropriately hyporheic functions in restoration schemes. Hyporheic ecosystems are largely controlled by hydrological processes, which may be simulated through physically-based models. Despite their apparent limitations (sophisticated, data-hungry, and computationally demanding), these models offer substantial advantages that may pertain to the operational level of river management: representation of specific landscapes, process-based sensitivity analyses, and alternative restoration scenario testing. This presentation builds on idealized and field-based studies, as well as literature examples, to discuss how physically-based models of hyporheic exchange can be fully exploited for restoration purposes. Results suggest that these models are best suited to map spatial patterns ofexchange at the sediment-water interface, rather than to estimate HEF fluxes and residence times. Because subsurface data are typically unavailable or sparse, an approach combining high-resolution topographic data combined with a sensitivity analysis appears as a promising approach for: (a) delineatingpotential areas of upwelling and downwelling along longitudinal and lateral channel sections; and (b) highlighting potential differences in HEF characteristics between reaches. To achieve satisfactory simulations, however, the challenge lies in the topographic representation of the channel and the discretization of the mesh. Here, common pitfalls are identified, and guidance to overcome these isprovided.",
author = "D.H. Kaser and Andrew Binley and Louise Heathwaite",
year = "2014",
language = "English",
note = "AG ; Conference date: 15-12-2014 Through 19-12-2014",

}

RIS

TY - CONF

T1 - From hyporheic science to river restoration

T2 - AG

AU - Kaser, D.H.

AU - Binley, Andrew

AU - Heathwaite, Louise

PY - 2014

Y1 - 2014

N2 - River managers need practical tools to promote appropriately hyporheic functions in restoration schemes. Hyporheic ecosystems are largely controlled by hydrological processes, which may be simulated through physically-based models. Despite their apparent limitations (sophisticated, data-hungry, and computationally demanding), these models offer substantial advantages that may pertain to the operational level of river management: representation of specific landscapes, process-based sensitivity analyses, and alternative restoration scenario testing. This presentation builds on idealized and field-based studies, as well as literature examples, to discuss how physically-based models of hyporheic exchange can be fully exploited for restoration purposes. Results suggest that these models are best suited to map spatial patterns ofexchange at the sediment-water interface, rather than to estimate HEF fluxes and residence times. Because subsurface data are typically unavailable or sparse, an approach combining high-resolution topographic data combined with a sensitivity analysis appears as a promising approach for: (a) delineatingpotential areas of upwelling and downwelling along longitudinal and lateral channel sections; and (b) highlighting potential differences in HEF characteristics between reaches. To achieve satisfactory simulations, however, the challenge lies in the topographic representation of the channel and the discretization of the mesh. Here, common pitfalls are identified, and guidance to overcome these isprovided.

AB - River managers need practical tools to promote appropriately hyporheic functions in restoration schemes. Hyporheic ecosystems are largely controlled by hydrological processes, which may be simulated through physically-based models. Despite their apparent limitations (sophisticated, data-hungry, and computationally demanding), these models offer substantial advantages that may pertain to the operational level of river management: representation of specific landscapes, process-based sensitivity analyses, and alternative restoration scenario testing. This presentation builds on idealized and field-based studies, as well as literature examples, to discuss how physically-based models of hyporheic exchange can be fully exploited for restoration purposes. Results suggest that these models are best suited to map spatial patterns ofexchange at the sediment-water interface, rather than to estimate HEF fluxes and residence times. Because subsurface data are typically unavailable or sparse, an approach combining high-resolution topographic data combined with a sensitivity analysis appears as a promising approach for: (a) delineatingpotential areas of upwelling and downwelling along longitudinal and lateral channel sections; and (b) highlighting potential differences in HEF characteristics between reaches. To achieve satisfactory simulations, however, the challenge lies in the topographic representation of the channel and the discretization of the mesh. Here, common pitfalls are identified, and guidance to overcome these isprovided.

M3 - Abstract

Y2 - 15 December 2014 through 19 December 2014

ER -