Publications de Christian Mörtl

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It is a complex task to evaluate the effects of a river rehabilitation measure on the riverscape’s habitat mosaic. This study investigated the medium term effects of a rehabilitation measure in a residual flow reach downstream of a hydroelectric dam. The r ...

In this study, we present the deep learning image segmentation model for drone-based grain size analysis of gravel bars called GALET. The objectives are to quantify the performance of the code and to test its applicability in river research and management. ...

The 130 m high Ilarion Dam is built on the Aliakmon River in northern Greece. Its two spillways are equipped with ski jumps to deflect high-velocity jets towards the centre of the plunge pool. Significant scouring occurred in the pool during two major floo ...

Depending on their characteristics and management, man-made reservoirs can have a significant impact on the natural sediment continuity of rivers. We classify different reservoir types and describe potential risks for the dam and downstream river reach. Ou ...

Sediment management is an important part of river rehabilitation and management. Global case studies provide a growing number of examples of successful sediment augmentation measures that can counter the adverse effects of disturbed sediment regimes. The i ...

Dataset for the paper "Influence of hydrograph shape and sediment augmentation repetition frequency on sediment transport dynamics and bed morphology evolution". It includes coordinates of the defined areas of interest and digital elevation models from the ...

In this study, we map different types of channel geomorphic units in a sediment-starved, residual-flow reach before and after an artificial flood. Bedload particles of a previous sediment augmentation measure are tracked with passive integrated transponder ...

The regulation of discharge and the retention of sediments in reservoirs disturb the natural water dynamics in residual flow stretches below reservoirs. However, a dynamic river morphology as well as near-natural hydrological hydrographs are fundamental ...

In this study, we present results from continuous field monitoring and a flume ex-periment of a sediment augmentation measure in a residual flow reach of the Swiss midlands. A straight morphological channel with fixed bed material was constructed to repres ...

This article presents assessment methods for the hydromorphological effectiveness of sediment augmentation measures downstream of dams. First, we describe different ways of quantifying hydromorphological effectiveness based on typical objectives of sedimen ...

In einer Restwasserstrecke der Saane wurde 2016 zur Sanierung der kolmatierten Gewässersohle und zur Aufwertung der Lebensräume ein künstliches Hochwasser ausgelöst und mit einer Sedimentzugabe gekoppelt. Die mittelfristigen Wirkungen der Sedimentzugabe wu ...

En octobre 2020, une crue artificielle d’essai a été relâchée dans la Sarine en aval du barrage de Rossens, dans le canton de Fribourg. L’objectif était de redynamiser le tronçon à débit résiduel de 13 km de long, surnommé la « Petite Sarine ». Manquant de ...

Christian Mörtl

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Ultrasonic Doppler flow velocity measurements as a co-indicator for the eco-morphological assessment in a residual flow reach

GALET: A deep learning image segmentation model for drone-based grain size analysis of gravel bars

Plunge pool scour and bank erosion: assessment of protection measures for Ilarion dam by physical and numerical modelling

The sediment challenge of Swiss river corridors interrupted by man-made reservoirs

Sediment Augmentation for River Rehabilitation and Management—A Review

Dataset for a flume experiment on sediment augmentation

Influence of channel geomorphic units on bedload transport and river morphology during low‐magnitude bed‐forming floods coupled with sediment augmentation

Untersuchung der ökomorphologischen Wirksamkeit von Sedimentzugaben unterhalb von Talsperren [Assessment of the eco-morphological effectiveness of sediment augmentation downstream of dams]

Continuous monitoring of morphological changes from sediment augmentation by field measurements and flume experiments

Assessment of the hydromorphological effectiveness of sediment augmentation measures downstream of dams

Wirkungskontrolle einer Sedimentzugabe: Habitatvielfalt und Kolmation

Impacts et enjeux de charriage d’une crue artificielle – Exemple de la Petite Sarine 2020 ||| Wirkung und Geschiebeproblematik eines künstlichen Hochwassers – Beispiel der Kleinen Saane 2020