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Wilbrand, K. (author), Taormina, R. (author), ten Veldhuis, Marie-claire (author), Visser, Martijn (author), Hrachowitz, M. (author), Nuttall, Jonathan (author), Dahm, Ruben (author)Streamflow predictions remain a challenge for poorly gauged and ungauged catchments. Recent research has shown that deep learning methods based on Long Short-Term Memory (LSTM) cells outperform process-based hydrological models for rainfall-runoff modeling, opening new possibilities for prediction in ungauged basins (PUB). These studies usually...journal article 2023
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van Oorschot, F. (author), van der Ent, R.J. (author), Hrachowitz, M. (author), Di Carlo, Emanuele (author), Catalano, Franco (author), Boussetta, Souhail (author), Balsamo, Gianpaolo (author), Alessandri, Andrea (author)Vegetation largely controls land surface–atmosphere interactions. Although vegetation is highly dynamic across spatial and temporal scales, most land surface models currently used for reanalyses and near-term climate predictions do not adequately represent these dynamics. This causes deficiencies in the variability of modeled water and energy...journal article 2023
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Kaitna, Roland (author), Prenner, David (author), Switanek, Matt (author), Maraun, Douglas (author), Stoffel, Markus (author), Hrachowitz, M. (author)Debris-flow activity is strongly controlled by hydro-meteorological trigger conditions, which are expected to change in a future climate. In this study we connect a regional hydro-meteorological susceptibility model for debris flows with climate projections until 2100 to assess changes of the frequency of critical trigger conditions for...journal article 2023
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Orlowski, Natalie (author), Rinderer, Michael (author), Dubbert, Maren (author), Ceperley, Natalie (author), Hrachowitz, M. (author), Gessler, Arthur (author), Rothfuss, Youri (author), Sprenger, Matthias (author), Heidbüchel, Ingo (author)Tracing and quantifying water fluxes in the hydrological cycle is crucial for understanding the current state of ecohydrological systems and their vulnerability to environmental change. Especially the interface between ecosystems and the atmosphere that is strongly mediated by plants is important to meaningfully describe ecohydrological...journal article 2023
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Refsgaard, Jens Christian (author), Mai, Juliane (author), Hrachowitz, M. (author), Jain, Sharad K. (author), Stisen, Simon (author)Catchment modelling has undergone tremendous developments during the past decades. In the 1970s, the focus was on simulation of catchment runoff with process descriptions and data inputs being lumped to the catchment scale. Later developments included spatially distributed models allowing data inputs and hydrological processes to be simulated at...journal article 2023
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Wang, S. (author), Hrachowitz, M. (author), Schoups, G.H.W. (author), Stumpp, Christine (author)Stable isotopes (I18O) and tritium (3H) are frequently used as tracers in environmental sciences to estimate age distributions of water. However, it has previously been argued that seasonally variable tracers, such as I18O, generally and systematically fail to detect the tails of water age distributions and therefore substantially...journal article 2023
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Debris-flow activity and sediment dynamics in the landslide-influenced Lattenbach catchment, AustriaAigner, Philipp (author), Kuschel, Erik (author), Sklar, Leonard (author), Zangerl, Christian (author), Hrachowitz, M. (author), De Haas, Tjalling (author), Huebl, Johannes (author), Kaitna, Roland (author)Deep seated landslides are common phenomena in Alpine areas. In case of a direct connectivity with the channel system, the catchment' s sediment yield and the probability of other forms of mass wasting processes such as debris flows may be increased significantly. Up to now, sediment dynamics related to deep-seated landslides and debris flows...journal article 2023
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Kaitna, Roland (author), Prenner, David (author), Switanek, Matt (author), Stoffel, Markus (author), Maraun, Douglas (author), Hrachowitz, M. (author)Debris-flow activity is expected to change in a future climate. In this study we connect a susceptibility model for debris-flows on a regional scale with climate projections until 2100. We use this to assess changes of hydro-meteorological trigger conditions for debris flows in six regions in the Austrian Alps. We find limited changes on an...journal article 2023
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Fresne, Maëlle (author), Chun, Kwok P. (author), Hrachowitz, M. (author), McGuire, Kevin J. (author), Schoppach, Remy (author), Klaus, Julian (author)Identifying the vegetation and topographic variables influencing the isotopic variability of xylem water of forest vegetation remains crucial to interpret and predict ecohydrological processes in landscapes. In this study, we used temporally and spatially distributed xylem stable water isotopes measurements from two growing seasons to examine...journal article 2023
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Bouaziz, L.J.E. (author), Aalbers, Emma (author), Weerts, Albrecht H. (author), Hegnauer, Mark (author), Buiteveld, Hendrik (author), Lammersen, Rita (author), Stam, Jasper (author), Sprokkereef, Eric (author), Savenije, Hubert (author), Hrachowitz, M. (author)Future hydrological behavior in a changing world is typically predicted based on models that are calibrated on past observations, disregarding that hydrological systems and, therefore, model parameters may change as well. In reality, hydrological systems experience almost continuous change over a wide spectrum of temporal and spatial scales. In...journal article 2022
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Ragno, E. (author), Hrachowitz, M. (author), Morales Napoles, O. (author)Non-parametric Bayesian networks (NPBNs) are graphical tools for statistical inference widely used for reliability analysis and risk assessment and present several advantages, such as the embedded uncertainty quantification and limited computational time for the inference process. However, their implementation in hydrological studies is still...journal article 2022
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- Thewissen, A. (author), Hrachowitz, M. (author), Blom, A. (author) conference paper 2022
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Integration of observed and model-derived groundwater levels in landslide threshold models in RwandaUwihirwe, J. (author), Hrachowitz, M. (author), Bogaard, T.A. (author)The incorporation of specific regional hydrological characteristics in empirical statistical landslide threshold models has considerable potential to improve the quality of landslide predictions towards reliable early warning systems. The objective of this research was to test the value of regional groundwater level information, as a proxy for...journal article 2022
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Benettin, Paolo (author), Rodriguez, Nicolas B. (author), Sprenger, Matthias (author), Kim, Minseok (author), Klaus, Julian (author), Harman, Ciaran J. (author), van der Velde, Ype (author), Hrachowitz, M. (author), Botter, Gianluca (author)Water transit time is now a standard measure in catchment hydrological and ecohydrological research. The last comprehensive review of transit time modeling approaches was published 15+ years ago. But since then the field has largely expanded with new data, theory and applications. Here, we review these new developments with focus on water-age...review 2022
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Uwihirwe, J. (author), Riveros Pavez, A.D. (author), Wanjala, Hellen (author), Schellekens, Jaap (author), Sperna Weiland, Frederiek (author), Hrachowitz, M. (author), Bogaard, T.A. (author)Satellite and hydrological model-based technologies provide estimates of rainfall and soil moisture over larger spatial scales and now cover multiple decades, sufficient to explore their value for the development of landslide early warning systems in data-scarce regions. In this study, we used statistical metrics to compare gauge-based and...journal article 2022
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Wiersma, P.G. (author), Aerts, J.P.M. (author), Zekollari, H. (author), Hrachowitz, M. (author), Drost, Niels (author), Huss, Matthias (author), Sutanudjaja, Edwin H. (author), Hut, R.W. (author)Global hydrological models have become a valuable tool for a range of global impact studies related to water resources. However, glacier parameterization is often simplistic or non-existent in global hydrological models. By contrast, global glacier models do represent complex glacier dynamics and glacier evolution, and as such, they hold the...journal article 2022
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Hrachowitz, M. (author), Stockinger, M. (author), Coenders-Gerrits, Miriam (author), van der Ent, R.J. (author), Bogena, H. (author), Lücke, A. (author), Stumpp, C. (author)Deforestation can considerably affect transpiration dynamics and magnitudes at the catchment scale and thereby alter the partitioning between drainage and evaporative water fluxes released from terrestrial hydrological systems. However, it has so far remained problematic to directly link reductions in transpiration to changes in the physical...journal article 2021
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Roodari, A. (author), Hrachowitz, M. (author), Hassanpour, Farzad (author), Yaghoobzadeh, Mostafa (author)The transboundary Helmand River basin (HRB) is the main drainage system for large parts of Afghanistan and the Sistan region of Iran. Due to the reliance of this arid region on water from the Helmand River, a better understanding of hydrological-drought pattern and the underlying drivers in the region is critically required for effective...journal article 2021
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Mianabadi, Ameneh (author), Hasheminia, Seyed Majid (author), Davary, Kamran (author), Derakhshan, Hashem (author), Hrachowitz, M. (author)In arid and semi-arid regions of the world, the occurrence of prolonged drought events (megadroughts) associated with climate change can seriously affect the balance between water supply and demand, thereby severely increasing the susceptibility of such regions to adverse impacts. In this study, a simple framework is introduced to estimate...journal article 2021
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Hanus, S. (author), Hrachowitz, M. (author), Zekollari, H. (author), Schoups, G.H.W. (author), Vizcaino, M. (author), Kaitna, Roland (author)Hydrological regimes of alpine catchments are expected to be strongly affected by climate change, mostly due to their dependence on snow and ice dynamics. While seasonal changes have been studied extensively, studies on changes in the timing and magnitude of annual extremes remain rare. This study investigates the effects of climate change on...journal article 2021