Catchment‐scale applications of hydraulic habitat models: Climate change effects on fish

Morel, Maxime; Pella, Hervé; Branger, Flora; Sauquet, Éric; Grenouillet, Gaël; Côte, Jessica; Braud, Isabelle; Lamouroux, Nicolas

doi:10.1002/eco.2513

Cited by 3 publications

(2 citation statements)

References 73 publications

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“…Uncertainty is propagated at various layers in the modelling chain starting from the SWAT+ estimations of discharge time series, velocity and discharge measurements, which are subsequently used in the hydraulic modelling calibration as well as the uncertainty in the preference curve inputs to the CASiMiR model. Considering all sources of uncertainty in such integrated modelling would be challenging, if not impossible (Morel et al, 2023); however, we may try to assess the pair‐wise uncertainty propagation. For example, the PBIAS of 15% (validation) for average flow scenario in SWAT+ translated into 0.08 m error of the water level, which is even higher than the reported value of the RMSE (0.06 m for validation).…”

Section: Discussionmentioning

confidence: 99%

Development of an integrated modelling framework to evaluate impacts of pressures on habitat conditions and riverine biota

Chattopadhyay,

Szałkiewicz,

Dytkiewicz

et al. 2023

Ecohydrology

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It is becoming extremely challenging to protect the structural and functional integrity of freshwater ecosystems, as many ecological systems face pressures from climate change, population growth and other environmental impacts. However, existing approaches of assessing impacts of external stressors to habitat conditions often neglect the long‐term hydrological changes. This study aimed to develop an integrated modelling framework to assess impacts of different stressors on reach‐scale habitat conditions for benthic macroinvertebrates in a temperate lowland river in central Poland. We coupled hydrological (SWAT+), hydraulic (HEC‐RAS 1D and SRH‐2D) and habitat (CASiMiR) models to predict the response of habitat suitability for the functional group of filter feeders to changes in the catchment for a 135‐m section of the Jeziorka river. Setting up and calibrating individual models required extensive field data collection (e.g., bathymetry field surveys, gauging water levels, discharge and flow velocity measurements and biological sampling). The performance of individual models in simulating discharge, water levels and depth/flow velocity was assessed as satisfactory according to literature. The modelling chain was then applied to compare the effects of three flow scenarios (average, low and high flows). The results showed an overall high value of hydraulic habitat suitability index for filter feeders, with moderately and severely lower values for low and high flow scenario, respectively. The implemented modelling framework performed well could be applied to examine the impacts of climate change and other anthropogenic stressors on reach‐scale habitat conditions. Its practical implementation could be beneficial towards sustainable water resources and environmental flow regime development.

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Section: Discussionmentioning

confidence: 99%

Development of an integrated modelling framework to evaluate impacts of pressures on habitat conditions and riverine biota

Chattopadhyay,

Szałkiewicz,

Dytkiewicz

et al. 2023

Ecohydrology

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“…In addition, we have considered time series of natural daily discharge simulated by the distributed hydrological model J2000 (Morel et al, 2023) over the period 1980-2016. The version of J2000 used here considers natural hydrological processes and was calibrated at the whole Rhone basin scale to simulate daily discharges at the outlet of medium-scale basins.…”

Section: Data Used For the Hydrological Analysis Of The Bonnegarde An...mentioning

confidence: 99%

Simulated hydrological effects of grooming and snowmaking in a ski resort on the local water balance

Morin,

François,

Réveillet

et al. 2023

Hydrol. Earth Syst. Sci.

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Abstract. The presence of a ski resort modifies the snow cover at the local scale, due to snow management practices on ski pistes, especially grooming and snowmaking. Snow management exerts 2-fold effects on the local hydrological cycle, through (i) abstraction and transfer of water used for snowmaking, and (ii) changes in water runoff due to added snow mass through snowmaking and/or delayed melting of the snowpack due to snow grooming. This induces a local pressure on water resources, which has seldom been addressed in scientific studies hitherto. Here we introduce a method to compute the hydrological effects of snow management on ski pistes and we apply and illustrate its results for the case study of the La Plagne ski resort in the Northern French Alps. The approach mainly relies on snow cover modelling using the Crocus snow cover driven by SAFRAN reanalysis and climate projections. Model results are evaluated against in-situ hydrological observations and show that the modelling approach, although very simplified for many hydrological processes, provides relevant information and insights in terms of the influence of snow-related processes on water resources. Our study shows a visible impact of grooming, virtually eliminating snowmelt in winter, thus delaying the onset of snowmelt. This results is a lower snowmelt flux during the wintertime, low flow period, on the order of −10 % to −20 %, compensated by higher amounts when snow melts. While about 10 % of the water used for snowmaking is estimated to be lost by evaporation through the ice formation process from the liquid water droplets, we find that, in the case studied, the annual scale alteration of water resources is limited and estimated to be on the order of 1 % to 2 %. This is due to the fact that the amount of water used for snowmaking on ski pistes represents a fraction of 10 % to 20 % of total annual precipitation, that ski pistes cover typically 10 % of the surface area of catchments within which ski resorts are located, and that snowmaking equipment covers, in the case of La Plagne, 40 % of the surface area of ski pistes. Therefore, in this case, snowmaking mainly leads to a moderate shift in snow cover formation and snowmelt processes and plays, for example, a smaller role than the influence of future climate change on mountain hydrology. This study provides an initial overview of the influence of grooming and snowmaking on river flows in a mountain catchment, which can inform future studies on water management and climate change adaptation in areas with ski tourism facilities. This study does not discuss long-term sustainability challenges of ski tourism and other aspects of the local environmental impacts (landscape, biodiversity) of snow management, such as the construction and use of mountain water reservoirs and other earthworks in ski resorts.

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Combining hillslope erosion and river connectivity models to assess large scale fine sediment transfers: Application over the Rhône River (France)

Fabre,

Fressard,

Bizzi

et al. 2024

Earth Surf Processes Landf

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Sediment connectivity at the catchment scale includes the processes linking sediment sources, sinks and the river outlet. Soil erosion models usually estimate yields without considering riverine processes or human infrastructure that may affect sediment connectivity. Quantifying these processes at a large scale is a determinant of understanding sediment transfers from continental lands to marine ecosystems. This study tries to fill this gap by coupling the soil erosion model WaTEM/SEDEM (WS) with the riverine connectivity tool CASCADE to quantify sediment fluxes in the Rhône watershed. The coupling returned a good fit, with deviations of −51.7%. WS alone predicts the exported fluxes better with a deviation of −34.9%. Nevertheless, this paper shows the importance of considering connectivity and transport capacity to develop a more realistic representation of fine sediment dynamics at a large scale. However, connectivity tools depend on the quality of the models (soil erosion and hydrology) and the geomorphological data on which they depend, which is a limiting factor in large‐scale studies.

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Catchment‐scale applications of hydraulic habitat models: Climate change effects on fish

Cited by 3 publications

References 73 publications

Development of an integrated modelling framework to evaluate impacts of pressures on habitat conditions and riverine biota

Development of an integrated modelling framework to evaluate impacts of pressures on habitat conditions and riverine biota

Simulated hydrological effects of grooming and snowmaking in a ski resort on the local water balance

Combining hillslope erosion and river connectivity models to assess large scale fine sediment transfers: Application over the Rhône River (France)

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