Vattenwebb: A Transparent Service to Support Decision Makers in Achieving Improved Water Status

Strömbäck, Lena; Hjerdt, Niclas; Bram, Lena Eriksson; Lewau, Per

doi:10.1007/978-3-642-41151-9_63

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…The catchments were chosen to cover a range of various characteristics, including topographic elevation, depth of the QD, land use, and stream slope and discharge. Data on discharge, land cover, and soil types presented in this section are all available from the Swedish Meteorological and Hydrological Institute (SMHI; Strömbäck et al 2013), and soil depths were extracted from the soil depth model provided by the Geological Survey of Sweden (Daniels and Thunholm 2014). All topographic data originate from a digital elevation model (DEM) with a resolution of 2 m × 2 m (GSD-Elevation data, grid 2+, ©Swedish Mapping, Cadastral, and Land Registration Authority).…”

Section: Study Catchments and Datamentioning

confidence: 99%

Contrôles géographiques et hydromorphologiques sur les interactions entre l’écoulement hyporhéique et la décharge des eaux souterraines profondes

et al. 2023

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Hyporheic exchange flow (HEF) at the streambed–water interface (SWI) has been shown to impact the pattern and rate of discharging groundwater flow (GWF) and the consequential transport of heat, solutes and contaminants from the subsurface into streams. However, the control of geographic and hydromorphological catchment characteristics on GWF–HEF interactions is still not fully understood. Here, the spatial variability in flow characteristics in discharge zones was investigated and averaged over three spatial scales in five geographically different catchments in Sweden. Specifically, the deep GWF discharge velocity at the SWI was estimated using steady-state numerical models, accounting for the real multiscale topography and heterogeneous geology, while an analytical model, based on power spectral analysis of the streambed topography and statistical assessments of the stream hydraulics, was used to estimate the HEF. The modeling resulted in large variability in deep GWF and HEF velocities, both within and between catchments, and a regression analysis was performed to explain this observed variability by using a set of independent variables representing catchment topography and geology as well as local stream hydromorphology. Moreover, the HEF velocity was approximately two orders of magnitude larger than the deep GWF velocity in most of the investigated stream reaches, indicating significant potential to accelerate the deep GWF velocity and reduce the discharge areas. The greatest impact occurred in catchments with low average slope and in reaches close to the catchment outlet, where the deep GWF discharge velocity was generally low.

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Section: Study Catchments and Datamentioning

confidence: 99%

Contrôles géographiques et hydromorphologiques sur les interactions entre l’écoulement hyporhéique et la décharge des eaux souterraines profondes

et al. 2023

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“…In arctic rivers with ice dynamics, climate change will likely have less effect on winter water temperatures because these rivers will stay frozen [1]. However, in the Gullspång River, an increase can be expected because it is rarely ice covered and typically has winter water temperatures > 0 • C (SMHI's Vattenwebb [22]), and it will likely be affected by a milder and wetter winter. The discharge time series that represented the current flow regime was based on data having a high temporal resolution (1 h −1 ) provided by the hydropower operator, and originating from years that were not unusually dry or wet (2013-2014).…”

Section: Flow and Temperature Scenariosmentioning

confidence: 99%

Increased Temperature and Discharge Influence Overwinter Growth and Survival of Juvenile Salmonids in a Hydropeaking River: Simulating Effects of Climate Change Using Individual-Based Modelling

Watz,

Schill,

Addo

et al. 2023

Fishes

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Climate change causes warming of rivers and may increase discharge, particularly during winter. Downstream of hydropower plants, fluctuating water temperature and flow create dynamic overwintering conditions for juvenile salmonids. We used inSTREAM 7.2-SD to simulate the effects of increased temperature (+2 °C) and discharge (+10%) on the overwinter growth and mortality of one-summer- and two-summer-old Atlantic salmon and brown trout in a river with a hydropeaking flow regime in a 2 × 2 design with replicated simulations. Water temperature had a major positive relationship with growth for both species and year classes, whereas increased flow alone had no major general effect on overwinter growth. For one-summer-old trout experiencing the high temperature regime, however, increased flow resulted in reduced growth. There were no major effects from temperature and flow on the survival rate of the two-summer-old fishes. On the other hand, there were significant interaction effects for the one-summer-olds, indicating that the effect of flow depended on temperature. For one-summer-old salmon, high flow resulted in increased survival in the low temperature regime, whereas it resulted in reduced survival in high temperature. In contrast, for one-summer-old trout, high flow resulted in reduced survival in the low temperature regime and increased survival in the high temperature. Different hydropower operation alternatives may interact with warming, affecting the relative competitive abilities of stream salmonids. Ecological models that predict the effects of different environmental conditions, such as temperature and flow regimes, may offer insight into such effects when in situ experiments are not feasible.

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“…There is a recognized and noteworthy value of readily available and easy accessible simulated daily streamflow series for 25 scarcely gauged, or ungauged, areas of the world to enhance awareness and decision-making (e.g., Arheimer et al, 2011;Hjerdt et al, 2011;Strömbäck et al, 2013). Nevertheless, the harmonization and enhancement of local performances of macro-scale models is still a scientific challenge that is worth addressing in operational hydrology, and which raises different research questions, such as:…”

mentioning

confidence: 99%

A geostatistical data-assimilation technique for enhancing macro-scale rainfall-runoff simulations

Pugliese¹,

Persiano²,

Bagli³

et al. 2017

Preprint

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Abstract. Our study develops and tests a geostatistical technique for locally enhancing macro-scale rainfall-runoff simulations on the basis of observed streamflow data that were not used in calibration. We consider Tyrol (Austria and Italy) and two different types of daily streamflow data: macro-scale rainfall-runoff simulations at 11 prediction nodes and observations at 46 gauged catchments. The technique consists of three main steps: (1) period-of-record flow-duration curves (FDCs) are geostatistically predicted at target ungauged basins, for which macro-scale model runs are available; (2) residuals between 5 geostatistically predicted FDCs and FDCs constructed from simulated streamflow series are computed; (3) the relationship between duration and residuals is used for enhancing simulated time series at target basins. We apply the technique in crossvalidation to 11 gauged catchments, for which simulated and observed streamflow series are available over the period 1980-2010. Our results show that (1) the procedure can significantly enhance macro-scale simulations (regional NSE increases from nearly zero to ≈ 0.7 in our study area) and (2) improvements are significant for low gauging network densities (i.e. 1 gauge

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Vattenwebb: A Transparent Service to Support Decision Makers in Achieving Improved Water Status

Cited by 3 publications

References 5 publications

Contrôles géographiques et hydromorphologiques sur les interactions entre l’écoulement hyporhéique et la décharge des eaux souterraines profondes

Contrôles géographiques et hydromorphologiques sur les interactions entre l’écoulement hyporhéique et la décharge des eaux souterraines profondes

Increased Temperature and Discharge Influence Overwinter Growth and Survival of Juvenile Salmonids in a Hydropeaking River: Simulating Effects of Climate Change Using Individual-Based Modelling

A geostatistical data-assimilation technique for enhancing macro-scale rainfall-runoff simulations

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