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Tang, Yuchen (author), Zhang, Fengbo (author), Bogaard, T.A. (author), Chassagne, C. (author), Ali, Zeeshan (author), Bandyopadhyay, Sulalit (author), Foppen, J.W.A. (author)Particle tracers are sometimes used to track sources and sinks of riverine particulate and contaminant transport. A potentially new particle tracer is ~200 nm sized superparamagnetic silica encapsulated DNA (SiDNAFe). The main objective of this research was to understand and quantify the settling and aggregation behaviour of SiDNAFe in river...journal article 2023
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- Gautam, K. (author), Roebroeck, M.E. (author), Bogaard, T.A. (author), Blom, A. (author) abstract 2023
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Luo, Y. (author), Zhang, Jiaming (author), Zhou, Zhi (author), Aguilar Lopez, J.P. (author), Greco, Roberto (author), Bogaard, T.A. (author)Preferential flow induced by desiccation cracks (PF-DC) has been proven to be an important hydrological effect that could cause various geotechnical engineering and ecological environment problems. Investigation on the PF-DC remains a great challenge due to the soil shrinking–swelling behavior. This work presents an experimental and numerical...journal article 2023
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Mapiam, Punpim Puttaraksa (author), Methaprayun, Monton (author), Bogaard, T.A. (author), Schoups, G.H.W. (author), ten Veldhuis, Marie-claire (author)The low density of conventional rain gauge networks is often a limiting factor for radar rainfall bias correction. Citizen rain gauges offer a promising opportunity to collect rainfall data at a higher spatial density. In this paper, hourly radar rainfall bias adjustment was applied using two different rain gauge networks: tipping buckets,...journal article 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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Kianfar, B. (author), Tian, Jingya (author), Rozemeijer, Joachim (author), van der Zaan, Bas (author), Bogaard, T.A. (author), Foppen, J.W.A. (author)In recent years, DNA-tagged silica colloids have been used as an environmental tracer. A major advantage of this technique is that the DNA-coding provides an unlimited number of unique tracers without a background concentration. However, little is known about the effects of physio-chemical subsurface properties on the transport behavior of...journal article 2022
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Urgilez Vinueza, A.R. (author), Handwerger, Alexander L. (author), Bakker, M. (author), Bogaard, T.A. (author)Slow-moving landslides move downslope at velocities that range from mm year<sup>−1</sup> to m year<sup>−1</sup>. Such deformations can be measured using satellite-based synthetic aperture radar interferometry (InSAR). We developed a new method to systematically detect and quantify accelerations and decelerations of slowly deforming areas...journal article 2022
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Pfeiffer, Jan (author), Zieher, Thomas (author), Schmieder, Jan (author), Bogaard, T.A. (author), Rutzinger, Martin (author), Spötl, Christoph (author)Continuous and slow-moving deep-seated landslides entail challenges for the effective planning of mitigation strategies aiming at the reduction of landslide movements. Given that the activity of most of these landslides is governed by pore pressure variations within the shear zone, profound knowledge about their hydrogeological control is...journal article 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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van Natijne, A.L. (author), Bogaard, T.A. (author), van Leijen, F.J. (author), Hanssen, R.F. (author), Lindenbergh, R.C. (author)Landslides are a major geohazard in hilly and mountainous environments. In-situ inspection of downslope motion is costly, sometimes dangerous and, requires prior knowledge of the existence of a landslide. Remote sensing from space is a way to detect and characterize landslides systematically at large scale. Interferometric Synthetic Aperture...journal article 2022
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Tang, Yuchen (author), Foppen, J.W.A. (author), Bogaard, T.A. (author)Surface water tracing is a widely used technique to investigate in-stream mass transport including contaminant migration. Recently, a microparticle tracer was developed with unique synthetic DNA encapsulated in an environmentally-friendly silica coating (Si-DNA microparticle). Previous tracing applications of such tracers reported detection...journal article 2021
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Wewer, M. (author), Aguilar Lopez, J.P. (author), Kok, M. (author), Bogaard, T.A. (author)Backward erosion piping is an internal erosion process, which compromises the stability of water retaining structures such as dams and levees. In this paper, we propose a numerical solution that combines a 2D Darcy groundwater solution with Exner's 1D sediment transport mass conservation equation. As an estimate of sediment transport, we...journal article 2021
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- de Haas, H. (author), Wang, Zhengbing (author), Mosselman, E. (author), Bogaard, T.A. (author), Cleveringa, J. (author) poster 2021
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Schenato, Luca (author), Aguilar Lopez, J.P. (author), Galtarossa, Andrea (author), Pasuto, Alessandro (author), Bogaard, T.A. (author), Palmieri, Luca (author)This paper describes the implementation of an FBG sensor to measure water levels in a dike. The sensor is based on a 3D-printed mechanical transducer through which the external pressure is converted into longitudinal strain exerted on the fiber. An additional FBG integrated within the sensor measures temperature and is used to compensate for...journal article 2021
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Wang, S. (author), Zhang, Ke (author), van Beek, Ludovicus P.H. (author), Tian, X. (author), Bogaard, T.A. (author)Rainfall-triggered shallow landslides are widespread natural hazards around the world, causing many damages to human lives and property. In this study, we focused on predicting landslides in a large region by coupling a 1 km-resolution hydrological model and a 90 m-resolution slope stability model, where a downscaling method for soil moisture...journal article 2020
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van Natijne, A.L. (author), Lindenbergh, R.C. (author), Bogaard, T.A. (author)Nowcasting and early warning systems for landslide hazards have been implemented mostly at the slope or catchment scale. These systems are often difficult to implement at regional scale or in remote areas. Machine Learning and satellite remote sensing products offer new opportunities for both local and regional monitoring of deep-seated...journal article 2020
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Ko, N.T. (author), Suter, Phil (author), Conallin, John (author), Rutten, M.M. (author), Bogaard, T.A. (author)Intensive and incessant disruptions in watercourses such as dams are taking place due to the growing demand for hydroelectric generation, and can result in severe deterioration of ecosystem integrity. This research concentrates on the impact of dams on macroinvertebrate communities downstream of two hydropower dams on tributaries of the upper...journal article 2020
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Marino, Pasquale (author), Peres, David J. (author), Cancelliere, Antonino (author), Greco, Roberto (author), Bogaard, T.A. (author)Empirical thresholds indicating the meteorological conditions leading to shallow landslide triggering are one of the most important components of landslide early warning systems (LEWS). Thresholds have been determined for many parts of the globe and present significant margins of improvement, especially for the high number of false alarms...journal article 2020
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Uwihirwe, J. (author), Hrachowitz, M. (author), Bogaard, T.A. (author)Regional empirical-statistical thresholds indicating the precipitation conditions initiating landslides are of crucial importance for landslide early warning system development. The objectives of this research were to use landslide and precipitation data in an empirical-statistical approach to (1) identify precipitation-related variables with...journal article 2020
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Urgilez Vinueza, A.R. (author), Robles, Jessica (author), Bakker, M. (author), Guzman, Pablo (author), Bogaard, T.A. (author)The high landslide risk potential along the steep hillslopes of the Eastern Andes in Ecuador provides challenges for hazard mitigation, especially in areas with hydropower dams and reservoirs. The objective of this study was to characterize, understand, and quantify the mechanisms driving the motions of the Guarumales landslide. This 1.5 km...journal article 2020