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Bettina Schaefli

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Publications associées (39)

Projecting hydropower production under future climates: a guide for decision-makers and modelers to interpret and design climate change impact assessments

Bettina Schaefli

Hydropower is a key energy source in almost all world regions. It fuels social and economic development, ensures electricity security, and is a pillar for renewable electricity production. But hydropower and its environmental impacts are vulnerable to clim ...

2015

Stream temperature prediction in ungauged basins: review of recent approaches and description of a new physics-derived statistical model

Bettina Schaefli, Marc Parlange, Michael Lehning, Wolf Hendrik Huwald, Aurélien Gallice

The development of stream temperature regression models at regional scales has regained some popularity over the past years. These models are used to predict stream temperature in ungauged catchments to assess the impact of human activities or climate chan ...

European Geosciences Union2015

SEHR-ECHO v1.0: a Spatially Explicit Hydrologic Response model for ecohydrologic applications

Bettina Schaefli, Cédric Imfeld, Andrea Rinaldo, Enrico Bertuzzo, Ludovico Nicotina, Pierfrancesco Da Ronco

This paper presents the Spatially Explicit Hydrologic Response (SEHR) model developed at the Laboratory of Ecohydrology of the Ecole Polytechnique Fédérale de Lausanne for the simulation of hydrological processes at the catchment scale. The key concept of ...

2014

Improving the degree-day method for sub-daily melt simulations with physically-based diurnal variations

Bettina Schaefli, Guillermo Barrenetxea Kobas, Marc Parlange, Cara Christine Tobin, Andrea Rinaldo, Silvia Simoni, Ludovico Nicotina

This paper proposes a new extension of the classical degree-day snowmelt model applicable to hourly simulations for regions with limited data and adaptable to a broad range of spatially-explicit hydrological models. The snowmelt schemes have been tested wi ...

Elsevier2013

Panta Rhei-Everything Flows: Change in hydrology and society-The IAHS Scientific Decade 2013-2022

Bettina Schaefli, Eva Jakab Toth, Harshit Gupta

The new Scientific Decade 2013-2022 of IAHS, entitled Panta RheiEverything Flows, is dedicated to research activities on change in hydrology and society. The purpose of Panta Rhei is to reach an improved interpretation of the processes governing the water ...

Taylor & Francis Ltd2013

An analytical model for soil-atmosphere feedback

Bettina Schaefli

Soil-atmosphere feedback is a key for understanding the hydrological cycle and the direction of potential system changes. This paper presents an analytical framework to study the interplay between soil and atmospheric moisture, using as input only the boun ...

European Geosciences Union2012

A robust framework for probabilistic precipitations downscaling from an ensemble of climate predictions applied to Switzerland

André Mermoud, Bettina Schaefli, Xavier Beuchat

Rainfall is poorly modeled by general circulation models (GCMs) and requires appropriate downscaling for local-scale hydrological impact studies. Such downscaling methods should be robust and accurate (to handle, e.g., extreme events and uncertainties), bu ...

2012

Snowfall Limit Forecasts and Hydrological Modeling

Bettina Schaefli, Cara Christine Tobin, Andrea Rinaldo

Hydrological flood forecasting in mountainous areas requires accurate partitioning between rain and snowfall to properly estimate the extent of runoff contributing areas. Here a method to make use of snowfall limit information-a standard output of limited- ...

Amer Meteorological Soc2012

Toward a robust method for subdaily rainfall downscaling from daily data

André Mermoud, Bettina Schaefli, Xavier Beuchat

Compared to daily rainfall data, observed subdaily rainfall times are rare and often very short. For hydrologic modeling, this problem is often addressed by generating synthetic hourly rainfall series, with rainfall generators calibrated on relevant rainfa ...

American Geophysical Union2011

Integrating point glacier mass balance observations into hydrologic model identification

Bettina Schaefli

The hydrology of high mountainous catchments is often predicted with conceptual precipitation-discharge models that simulate the snow accumulation and ablation behavior of a very complex environment using as only input temperature and precipitation. It is ...

European Geosciences Union2011

HESS Opinions: Hydrologic predictions in a changing environment: behavioral modeling

Bettina Schaefli

Most hydrological models are valid at most only in a few places and cannot be reasonably transferred to other places or to far distant time periods. Transfer in space is difficult because the models are conditioned on past observations at particular places ...

2011

Signature-based model calibration for hydrologic prediction in mesoscale Alpine catchments

Bettina Schaefli, Abdelkader Mezghani

This paper presents a calibration framework for a precipitation-runoff model for flood prediction in a mesoscale Alpine basin with strongly anthropogenic discharges. The developed methodology addresses two classical hydrological calibration challenges: com ...

2010

Climate change and hydropower production in the Swiss Alps: quantification of potential impacts and related modelling uncertainties

André Musy, Bettina Schaefli

This paper addresses two major challenges in the field of climate change impact analysis on water resources systems: i) incorporation of a large range of potential climate change scenarios and ii) quantification of related modelling uncertainties. The deve ...

2007

Accounting for global mean warming and scaling uncertainties in climate change impact studies: application to a regulated lake system

André Musy, Bettina Schaefli, Abdelkader Mezghani

A probabilistic assessment of climate change and related impacts should consider a large range of potential future climate scenarios. State-of-the-art climate models, especially coupled atmosphere-ocean general circulation models and Regional Climate Model ...

2007

Quantifying hydrological modeling errors through a mixture of normal distributions

André Musy, Bettina Schaefli

Bayesian inference of posterior parameter distributions has become widely used in hydrological modeling to estimate the associated modeling uncertainty. The classical underlying statistical model assumes a Gaussian modeling error with zero mean and a given ...

2007

Assessment of climate change impacts on Alpine discharge regimes with climate model uncertainty

André Musy, Bettina Schaefli, Abdelkader Mezghani

The present study analyzes the uncertainty induced by the use of different state-of-the-art climate models on the prediction of climate change impacts on the runoff regimes of 11 mountainous catchments in the Swiss Alps having current glaciation rates betw ...

2006

What can we learn by transposing the calibration – validation paradigm into a multi-objective context ?

André Musy, Bettina Schaefli

The classical single-objective model calibration and validation approach using different time periods for each of them is known not to be sufficient to judge whether the model predictions are consistent or to detect model structural deficiencies. It is how ...

2005

A conceptual glacio-hydrological model for high mountainous catchments

Markus Niggli, André Musy, Bettina Schaefli

In high mountainous catchments, the spatial precipitation and therefore the overall water balance is generally difficult to estimate. The present paper describes the structure and calibration of a semi-lumped conceptual glaciohydrological model for the joi ...

2005

Quantification of modelling uncertainties in climate change impact studies on water resources : application to a glacier-fed hydropower production system in the Swiss Alps

Bettina Schaefli

This PhD thesis presents the development of a methodological framework to analyse potential climate change impacts on a high mountainous water resources system and to quantify the associated modelling uncertainties. The main objective is to show whether st ...

EPFL2005

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