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Imhoff, Ruben O. (author), De Cruz, Lesley (author), Dewettinck, Wout (author), Brauer, Claudia C. (author), Uijlenhoet, R. (author), van Heeringen, Klaas Jan (author), Velasco-Forero, Carlos (author), Nerini, Daniele (author), Van Ginderachter, Michiel (author), Weerts, Albrecht H. (author)Flash flood early warning requires accurate rainfall forecasts with a high spatial and temporal resolution. As the first few hours ahead are already not sufficiently well captured by the rainfall forecasts of numerical weather prediction (NWP) models, radar rainfall nowcasting can provide an alternative. Because this observation-based method...journal article 2023
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Wullems, Bas J.M. (author), Brauer, Claudia C. (author), Baart, F. (author), Weerts, Albrecht H. (author)Estuarine salt intrusion causes problems with freshwater availability in many deltas. Water managers require timely and accurate forecasts to be able to mitigate and adapt to salt intrusion. Data-driven models derived with machine learning are ideally suited for this, as they can mimic complex non-linear systems and are computationally...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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Aerts, J.P.M. (author), Hut, R.W. (author), van de Giesen, N.C. (author), Drost, Niels (author), van Verseveld, Willem J. (author), Weerts, Albrecht H. (author), Hazenberg, Pieter (author)Distributed hydrological modelling moves into the realm of hyper-resolution modelling. This results in a plethora of scaling-related challenges that remain unsolved. To the user, in light of model result interpretation, finer-resolution output might imply an increase in understanding of the complex interplay of heterogeneity within the...journal article 2022
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Imhoff, R. O. (author), Brauer, C. C. (author), van Heeringen, K. J. (author), Uijlenhoet, R. (author), Weerts, A. H. (author)To assess the potential of radar rainfall nowcasting for early warning, nowcasts for 659 events were used to construct discharge forecasts for 12 Dutch catchments. Four open-source nowcasting algorithms were tested: Rainymotion Sparse (RM-S), Rainymotion DenseRotation (RM-DR), Pysteps deterministic (PS-D), and probabilistic (PS-P) with 20...journal article 2022
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Wannasin, C. (author), Brauer, C.C. (author), Uijlenhoet, R. (author), van Verseveld, W.J. (author), Weerts, Albrecht H. (author)Study region Upper region of the Greater Chao Phraya River (GCPR) basin in Thailand. Study focus This study presents a (∼1 km resolution) distributed hydrological model, wflow_sbm, with global spatial data and parameterization for estimating daily streamflow in the upper GCPR basin, with the aim to overcome in situ data scarcity often occurring...journal article 2021
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Imhoff, Ruben (author), Brauer, Claudia (author), Van Heeringen, Klaas Jan (author), Leijnse, Hidde (author), Overeem, Aart (author), Weerts, Albrecht (author), Uijlenhoet, R. (author)The presence of significant biases in real-time radar quantitative precipitation estimations (QPEs) limits its use in hydrometeorological forecasting systems. Here, we introduce CARROTS (Climatology-based Adjustments for Radar Rainfall in an OperaTional Setting), a set of fixed bias reduction factors, which vary per grid cell and day of the...journal article 2021
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Eilander, Dirk (author), van Verseveld, Willem (author), Yamazaki, Dai (author), Weerts, Albrecht (author), Winsemius, H.C. (author), Ward, Philip J. (author)Distributed hydrological models rely on hydrography data such as flow direction, river length, slope and width. For large-scale applications, many of these models still rely on a few flow direction datasets, which are often manually derived. We propose the Iterative Hydrography Upscaling (IHU) method to upscale high-resolution flow direction...journal article 2021
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Wannasin, C. (author), Brauer, C. C. (author), Uijlenhoet, R. (author), van Verseveld, W. J. (author), Weerts, A. H. (author)Study region: Upper region of the Greater Chao Phraya River (GCPR) basin in Thailand. Study focus: The upper GCPR basin is highly regulated by multipurpose reservoirs, which obviously have altered the natural streamflow. Understanding quantitative effects of such alteration is crucial for effective water resource management. Therefore, this...journal article 2021
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Taljaard, S. (author), Slinger, J (author), Weerts, S. P. (author), Vreugdenhil, H.S.I. (author)Rapid urbanization of the coast, growing global trade, stakeholder emancipation and ongoing depletion of natural resources mean that ports can no longer operate and develop without acknowledging and incorporating societal and environmental considerations. Drawing primarily on first-hand experiences in South African ports, supplemented with...journal article 2021
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Bouaziz, L.J.E. (author), Steele-Dunne, S.C. (author), Schellekens, Jaap (author), Weerts, Albrecht H. (author), Stam, Jasper (author), Sprokkereef, Eric (author), Winsemius, H.C. (author), Savenije, Hubert (author), Hrachowitz, M. (author)The spatiotemporal dynamics of water volumes stored in the unsaturated root zone are a key control on the response of terrestrial hydrological systems. Robust, catchment-scale root-zone soil moisture estimates are thus critical for reliable predictions of river flow, groundwater recharge, or evaporation. Satellites provide estimates of near...journal article 2020
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Benedict, Imme (author), Van Heerwaarden, Chiel C. (author), van der Ent, R.J. (author), Weerts, Albrecht H. (author), Hazeleger, Wilco (author)Assessment of the impact of climate change on water resources over land requires knowledge on the origin of the precipitation and changes therein toward the future. We determine the origin of precipitation over the Mississippi River basin (MRB) using high-resolution (~25 km) climate model simulations for present and future climate (RCP4.5)....journal article 2020
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Hagen, Jenny Sjåstad (author), Cutler, Andrew (author), Trambauer, Patricia (author), Weerts, Albrecht (author), Suarez, Pablo (author), Solomatine, D.P. (author)Forecast-based financing is a financial mechanism that facilitates humanitarian actions prior to anticipated floods by triggering release of pre-allocated funds based on exceedance of flood forecast thresholds. This paper presents a novel model suitability matrix that embeds application-specific needs and contingencies at local level on a...journal article 2020
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Casson, David R. (author), Werner, Micha (author), Weerts, Albrecht (author), Solomatine, D.P. (author)Hydrological modelling in the Canadian sub-Arctic is hindered by sparse meteorological and snowpack data. The snow water equivalent (SWE) of the winter snowpack is a key predictor and driver of spring flow, but the use of SWE data in hydrological applications is limited due to high uncertainty. Global re-analysis datasets that provide gridded...journal article 2018
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Bouaziz, L.J.E. (author), Weerts, Albrecht (author), Schellekens, Jaap (author), Sprokkereef, Eric (author), Stam, Jasper (author), Savenije, Hubert (author), Hrachowitz, M. (author)Intercatchment groundwater flows (IGFs), defined as groundwater flows across topographic divides, can occur as regional groundwater flows that bypass headwater streams and only drain into the channel further downstream or directly to the sea. However, groundwater flows can also be diverted to adjacent river basins due to geological features ...journal article 2018
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Wani, Omar (author), Beckers, Joost V.L. (author), Weerts, Albrecht H. (author), Solomatine, D.P. (author)A non-parametric method is applied to quantify residual uncertainty in hydrologic streamflow forecasting. This method acts as a post-processor on deterministic model forecasts and generates a residual uncertainty distribution. Based on instance-based learning, it uses a k nearest-neighbour search for similar historical hydrometeorological...journal article 2017
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Verkade, J.S. (author), Brown, J. D. (author), Davids, F. (author), Reggiani, P. (author), Weerts, A. H. (author)Two statistical post-processing approaches for estimation of predictive hydrological uncertainty are compared: (i) ‘dressing’ of a deterministic forecast by adding a single, combined estimate of both hydrological and meteorological uncertainty and (ii) ‘dressing’ of an ensemble streamflow forecast by adding an estimate of hydrological...journal article 2017
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- Drost, N. (author), Bierkens, M. (author), Donchyts, G. (author), Van de Giesen, N.C. (author), Hummel, S. (author), Hut, R.W. (author), Kockx, A. (author), Meersbergen, M. (author), Sutanudjaja, E. (author), Verlaan, M. (author), Weerts, A. (author), Winsemius, H. (author) journal article 2015
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Dogulu, N. (author), Lopez Lopez, P. (author), Solomatine, D.P. (author), Weerts, A.H. (author), Shrestha, D.L. (author)In operational hydrology, estimation of the predictive uncertainty of hydrological models used for flood modelling is essential for risk-based decision making for flood warning and emergency management. In the literature, there exists a variety of methods analysing and predicting uncertainty. However, studies devoted to comparing the performance...journal article 2015
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- Tangdamrongsub, N. (author), Dunne, S.C. (author), Gunter, B.C. (author), Ditmar, P.G. (author), Weerts, A.H. (author) journal article 2014