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Oosterlo, P. (author), McCall, R.T. (author), Vuik, V. (author), Hofland, Bas (author), van der Meer, J.W. (author), Jonkman, Sebastiaan N. (author)Shallow foreshores in front of coastal dikes can reduce the probability of dike failure due to wave overtopping. A probabilistic model framework is presented, which is capable of including complex hydrodynamics like infragravity waves, and morphological changes of a sandy foreshore during severe storms in the calculations of the probability of...journal article 2018
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Lemos, Rute (author), Fortes, Conceição J.E.M. (author), Mendonca, Ana (author), Rosa-Santos, Paulo (author), Taveira-Pinto, Francisco (author), de Almeida Sousa, E. (author), Hofland, Bas (author)No âmbito do projeto HYDRALAB+ (H2020-INFRAIA-2014-2015), foi realizado no LNEC um conjunto de ensaios em modelo físico bidimensional (2D) de um perfil de um quebra-mar de talude em enrocamento, construído à escala geométrica 1:30, para diferentes condições de agitação marítima e níveis de maré correspondentes a cenários de alterações climáticas...conference paper 2018
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Esteban, Miguel (author), Glasbergen, Toni (author), Takabatake, Tomoyuki (author), Hofland, Bas (author), Nishizaki, Shinsaku (author), Nishida, Yuta (author), Stolle, Jacob (author), Nistor, Ioan (author), Bricker, J.D. (author), Takagi, Hiroshi (author), Shibayama, Tomoya (author)Following the 2011 Tohoku Earthquake and Tsunami, Japanese tsunami protection guidelines stipulate that coastal defences should ensure that settlements are shielded from the coastal inundation that would result from Level 1 tsunami events (with return periods in the order of about 100 years). However, the overtopping mechanism and leeward...journal article 2017
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Shen, Y. (author), Lindenbergh, R.C. (author), Hofland, Bas (author), Kramer, R. (author)For better understanding how coastal structures with gentle slopes behave during high energy events, a wave attack experiment representing a storm of 3000 waves was performed in a flume facility. Two setups with different steepness of slope were compared under the same conditions. In order to quantify changes in the rock slopes after the wave...conference paper 2017
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Hofland, Bas (author), Rosa-Santos, Paulo (author), Taveira-Pinto, Francisco (author), de Almeida Sousa, E. (author), Lemos, Rute (author), Mendonça, A. (author), Juana Fortes, C (author)This paper studies novel ways to evaluate armour damage in physical models of coastal structures. High-resolution damage data for reference rubble mound breakwaters obtained under the HYDRALAB+ joint-research project are analysed and discussed. These tests are used to analyse the way to describe damage, the influence of the sequence of testing,...conference paper 2017
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Hofland, Bas (author), Chen, X. (author), Altomare, Corrado (author), Oosterlo, P. (author)During the last decades, the spectral wave period <i>T</i><sub>m-1,0</sub> has become accepted as a characteristic wave period when describing the hydraulic attack on coastal structures, especially over shallow foreshores. In this study, we derive an empirical prediction formula for <i>T</i><sub>m-1,0</sub> on shallow to extremely shallow...journal article 2017
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Streicher, Maximilian (author), Kortenhaus, Andreas (author), Altomare, Corrado (author), Gruwez, Vincent (author), Hofland, Bas (author), Chen, X. (author), Marinov, Krasimir (author), Scheres, Babette (author), Schüttrumpf, Holger (author), Hirt, Matthias (author), Cappietti, Lorenzo (author), Esposito, Andrea (author), Saponieri, Alessandra (author), Valentini, Nico (author), Tripepi, Giuseppe (author), Pasqualini, D.G.J. (author), Di Risio, Marcello (author), Aristodemo, Francesco (author), Damiani, Leonardo (author), Willems, Marc (author), Vanneste, Dieter (author), Suzuki, T. (author), Klein Breteler, Mark (author), Kaste, Dorothea (author)Overtopping wave loads on vertical structures on top of a dike have been investigated in several small scale experiments in the past. A large-scale validation for a mild foreshore situation is still missing. Hence the WALOWA experimental campaign was carried out to address this topic. In the present paper the objectives of the WALOWA project are...conference paper 2017
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Okumura, N. (author), Jonkman, Sebastiaan N. (author), Esteban, M (author), Hofland, Bas (author), Shibayama, T (author)This paper presents a methodology for tsunami risk assessment, which was applied to a case study in Kamakura, Japan. This methodology was developed in order to evaluate the effectiveness of a risk-reducing system against such hazards, also aiming to demonstrate that a risk assessment is possible for these episodic events. The tsunami risk...journal article 2017
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Hofland, B. (author)Foto's van de schade in 1953 bij Halsteren, de noodmaatregelen en het herstel daarna. Beschrijving en tekeningen van de situatie uit het Verslag van de Stormvloed.report 2016
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Hofland, Bas (author), Marissen, R. (author), Bergsma, O.K. (author)Proof-of-concept model tests on a novel self-deploying on-shore tsunami barrier were executed. The tsunami barrier consists of a membrane, floater and cables that are stored underground. Due to buoyancy the barrier self-deploys when struck by a tsunami. The membrane and cables consist of the strong, flexible and light-weight material Dyneema...conference paper 2016
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Wenneker, I. (author), Hoffmann, Rob (author), Hofland, Bas (author)The new Delta Flume of Deltares (300 m long x 5 m wide x 9.5 m deep) is used to test wave interaction with, among others, sea defences (dikes, dunes), coastal structures (e.g. breakwaters, revetments and jetties), eco-dynamic designs and<br/>coastal morphology. The present paper presents the first outcomes of the performance tests of the flume...conference paper 2016
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Hofland, Bas (author), van Gent, Marcel (author)A method to quantify, analyse, and present the settlement of single-layer concrete armour layers of coastal structures is presented. The use of the image processing technique for settlement analysis is discussed based on various modelling<br/>studies performed over the years. The accuracy of the technique is assessed, and the application of the...conference paper 2016
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Steenstra, Remco (author), Hofland, Bas (author), Paarlberg, Andries (author), Smale, Alfons (author), Huthoff, Fredrik (author), Uijttewaal, W.S.J. (author)A stability parameter for rock in bed protections under nonuniform stationary flow is derived. The influence of the mean flow velocity, turbulence, and mean acceleration of the flow are included explicitly in the parameter. The relatively new notion of explicitly incorporating the mean acceleration of the flow significantly improves the...journal article 2016
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Chen, X. (author), Hofland, B. (author), Altomare, C. (author), Uijttewaal, J.S.W. (author)In this paper the impact process and mechanism of overtopping flow on a vertical wall on a dike crest are investigated by means of a series of physical model tests. A double-peaked force was recognized in a time series of an overtoping flow. Four stages were summarized for the whole overtopping flow impact process. An empirical relationship...conference paper 2014
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Streicher, M. (author), Hofland, B. (author), Lindenbergh, R.C. (author)Currently a new wave flume for hydraulic experiments near to prototype scale is under construction at Deltares. In the flume, modern measurement equipment will be installed. One of the potential sensor techniques is Terrestrial Laser Scanner (TLS) based range measurements of water waves. TLS range measurements are a very fast and accurate method...conference paper 2013
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Hoan, N.T. (author), Stive, M.J.F. (author), Booij, R. (author), Hofland, B. (author), Verhagen, H.J. (author)This paper presents the results of an experimental study on stone stability under nonuniform turbulent flow, in particular expanding flow. Detailed measurements of both flow and turbulence and the bed stability are described. Than various manners of quantifying the hydraulic loads exerted on the stones on a bed are extensively reviewed and...journal article 2011
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Hofland, H.J.A. (author), Brandt Corstius, H. (author), Noordervilet, N. (author), Grunberg, A. (author), Goldschmidt, T. (author), Wieringa, T. (author), Van der Heijden, A.F.Th. (author), Meijsing, D. (author), Hageman, R. (author), Verstegen, L. (author)Sinds 2001 wordt jaarlijks een schrijver uitgenodigd om gedurende een periode van twee maanden het gastschrijverschap aan de Technische Universiteit Delft te vervullen. De TU Delft organiseert het gastschrijverschap in samenwerking met Verstegen & Stigter culturele projecten. Het gastschrijverschap begint met een openbaar openingscollege....book 2010
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Glorie, M. (author), Zaidman, A. (author), Van Deursen, A. (author), Hofland, L. (author)Paper accepted for publication in the Journal on Software Maintenance and Evolution — Research and Practice, Wiley, 2009. PhilipsMedical Systems produces medical diagnostic imaging products, such as MR, X-ray and CT systems. The software of these devices is complex, has been evolving for several decades and is currently a multi-MLOC monolithic...report 2009
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Glorie, M. (author), Zaidman, A.E. (author), Hofland, L. (author), Van Deursen, A. (author)Preprint of paper published in: CSMR 2008 - 12th European Conference on Software Maintenance and Reengineering, 1-4 April 2008; doi:10.1109/CSMR.2008.4493310 Philips medical systems produces medical diagnostic imaging products, such as MR, X-ray and CT scanners. The software of these devices is complex, has been evolving for several decades and...report 2008
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Hoan, N.T. (author), Booij, R. (author), Hofland, B. (author), Stive, M.J.F. (author), Verhagen, H.J. (author)The current research is aimed at evaluating the applicability of a numerical flow model to predict bed damage. First, an experimental study was carried out to get more inside into the relation between flow forces acting on a bed and the bed response (damage). The experiments were then used as the basis for the evaluation. Second, the flow was...conference paper 2008