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Backward erosion piping: Initiation and progression

Van Beek, V.M. (author)

Backward erosion piping is an internal erosion mechanism during which shallow pipes are formed in the direction opposite to the flow underneath water-retaining structures as a result of the gradual removal of sandy material by the action of water. It is an important failure mechanism in both dikes and dams where sandy layers are covered by a...

doctoral thesis 2015

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Identification and simulation of space–time variability of past hydrological drought events in the Limpopo River basin, southern Africa

Trambauer, P. (author), Maskey, S. (author), Werner, M. (author), Pappenberger, F. (author), Van Beek, L.P.H. (author), Uhlenbrook, S. (author)

Droughts are widespread natural hazards and in many regions their frequency seems to be increasing. A finer-resolution version (0.05° × 0.05°) of the continental-scale hydrological model PCRaster Global Water Balance (PCR-GLOBWB) was set up for the Limpopo River basin, one of the most water-stressed basins on the African continent. An irrigation...

journal article 2014

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Assimilating data from remote sensing into a high-resolution global hydrological model

Lu, Y. (author), Sutanudjaja, E. (author), Drost, N. (author), Hut, R.W. (author), Dunne, S.C. (author), Van de Giesen, N.C. (author), De Jong, K. (author), Van Beek, L. (author), Bierkens, M. (author)

journal article 2014

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Identification and simulation of space-time variability of past hydrological drought events in the Limpopo river basin, Southern Africa

Trambauer, P. (author), Maskey, S. (author), Werner, M. (author), Pappenberger, F. (author), Van Beek, L.P.H. (author), Uhlenbrook, S. (author)

journal article 2014

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Advancing catchment hydrology to deal with predictions under change

Ehret, U. (author), Gupta, H.V. (author), Sivapalan, M. (author), Weijs, S.V. (author), Schymanski, S.J. (author), Blöschl, G. (author), Gelfan, A.N. (author), Harman, C. (author), Kleidon, A. (author), Bogaard, T.A. (author), Wang, D. (author), Wagener, T. (author), Scherer, U. (author), Zehe, E. (author), Bierkens, M.F.P. (author), Di Baldassarre, G. (author), Parajka, J. (author), Van Beek, L.P.H. (author), Van Griensven, A. (author), Westhoff, M.C. (author), Winsemius, H.C. (author)

Throughout its historical development, hydrology as an earth science, but especially as a problem-centred engineering discipline has largely relied (quite successfully) on the assumption of stationarity. This includes assuming time invariance of boundary conditions such as climate, system configurations such as land use, topography and...

journal article 2014

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Comparison of different evaporation estimates over the African continent

Trambauer, P. (author), Dutra, E. (author), Maskey, S. (author), Werner, M. (author), Pappenberger, F. (author), Van Beek, L.P.H. (author), Uhlenbrook, S. (author)

Evaporation is a key process in the water cycle with implications ranging, inter alia, from water management to weather forecast and climate change assessments. The estimation of continental evaporation fluxes is complex and typically relies on continental-scale hydrological models or land-surface models. However, it appears that most global or...

journal article 2014

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The effect of electrical stray current on material properties of mortar specimens

Susanto, A. (author), Koleva, D.A. (author), Van Beek, C. (author), Van Breugel, K. (author)

Well known is that stray electrical current i.e. current with a spatial distribution in any conductive environment, can affect civil structures, e.g. initiate or enhance steel corrosion or affect microstructural and mechanical properties of the cement-based bulk matrix. While the former is related to polarization effects in conditions of current...

conference paper 2013

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Skill of a global seasonal streamflow forecasting system, relative roles of initial conditions and meteorological forcing

Candogan Yossef, N. (author), Winsemius, H.C. (author), Weerts, A. (author), Van Beek, R. (author), Bierkens, M.F.P. (author)

We investigate the relative contributions of initial conditions (ICs) and meteorological forcing (MF) to the skill of the global seasonal streamflow forecasting system FEWS-World, using the global hydrological model PCRaster Global Water Balance. Potential improvement in forecasting skill through better climate prediction or by better estimation...

journal article 2013

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Comparison of different evaporation estimates over the African continent

Trambauer, P. (author), Dutra, E. (author), Maskey, S. (author), Werner, M. (author), Pappenberger, F. (author), Van Beek, L.P.H. (author), Uhlenbrook, S. (author)

Evaporation is a key process in the water cycle, with implications ranging from water management, to weather forecast and climate change assessments. The estimation of continental evaporation fluxes is complex and typically relies on continental-scale hydrological or land-surface models. However, it appears that most global or continental-scale...

journal article 2013

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eWaterCycle: Real time assimilation of massive data streams into a hyper-resolution global hydrological model

Hut, R.W. (author), Sutanudjaja, E. (author), Drost, N. (author), Dunne, S.C. (author), De Jong, K. (author), Van Beek, L. (author), Van de Giesen, N.C. (author), Bierkens, M. (author)

journal article 2013

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eWaterCycle: Developing a hyper resolution global hydrological model

Sutanudjaja, E. (author), Hut, R.W. (author), Drost, N. (author), Steele-Dunne, S.C. (author), De Jong, K. (author), Van Beek, L. (author), Karssenberg, D. (author), Van de Giesen, N.C. (author), Bierkens, M. (author)

journal article 2013

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Mechanical, electrical and microstructural properties of cement-based materials in conditions of stray current flow

Susanto, A. (author), Koleva, D.A. (author), Copuroglu, O. (author), Van Beek, C. (author), Van Breugel, K. (author)

This investigation presents a comparative study on mechanical properties, electrical resistivity and microstructure of mortar under DC current, compared to mortar in rest (no current) conditions. Monitoring was performed from 24h after casting until 84 days of cement hydration. A current density level of 10 mA/m2 was chosen as a simulation...

journal article 2013

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A model of hydrological and mechanical feedbacks of preferential fissure flow in a slow-moving landslide

Krzeminska, D.M. (author), Bogaard, T.A. (author), Malet, J.P. (author), Van Beek, L.P.H. (author)

The importance of hydrological processes for landslide activity is generally accepted. However, the relationship between precipitation, hydrological responses and movement is not straightforward. Groundwater recharge is mostly controlled by the hydrological material properties and the structure (e.g., layering, preferential flow paths such as...

journal article 2013

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Mechanical, electrical and microstructural properties of cement-based materials in conditions of current flow

Susanto, A. (author), Koleva, D.A. (author), Copuroglu, O. (author), Van Beek, C. (author), Van Breugel, K. (author)

Corrosion in reinforced concrete structures is not only induced by the penetration of aggressive substances (e.g. chlorides and/or CO2) but also influenced by stray currents. Further, the degradation mechanisms in reinforced cement-based systems due to the combined effect of stray current and chloride penetration have been a serious problem in...

conference paper 2012

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A model of hydrological and mechanical feedbacks of preferential fissure flow in a slow-moving landslide

Krzeminska, D.M. (author), Bogaard, T.A. (author), Malet, J.P. (author), Van Beek, L.P.H. (author)

The importance of hydrological processes for landslide activity is generally accepted. However, the relationship between precipitation, hydrological responses and movement is not straightforward. Groundwater recharge is mostly controlled by the hydrological material properties and the structure (e.g. layering, preferential flow paths such as...

journal article 2012

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A conceptual model of the hydrological influence of fissures on landslide activity

Krzeminska, D.M. (author), Bogaard, T.A. (author), Van Asch, T.W.J. (author), Van Beek, L.P.H. (author)

Hydrological processes control the behaviour of many unstable slopes, and their importance for landslide activity is generally accepted. The presence of fissures influences the storage capacity of a soil and affects the infiltration processes of rainfall. The effectiveness of the fissure network depends upon fissure size, their spatial...

journal article 2012

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Piping: Over 100 years of experience: From empiricism towards reliability-based design

Van Beek, V.M. (author), Knoeff, H.G. (author), Schweckendiek, T. (author)

Backward piping is the process of channel formation in a sandy aquifer under river dikes. During high water periods this process manifests itself by the formation of sand boils. A long history of cases and experiments has contributed to the insights into this phenomenon and has improved the ability to predict the safety of levees.

book chapter 2011

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Tree rainfall interception measured by stem compression

Friesen, J.C. (author), Van Beek, C. (author), Selker, J. (author), Savenije, H.H.G. (author), Van de Giesen, N. (author)

A method for measuring whole-tree interception of precipitation is presented which employs mechanical displacement sensors to measure trunk compression caused by the water captured by the tree. This direct and nondestructive method is demonstrated to be sensitive to less than 5 kg of interception field tests in Netherlands and Ghana.

journal article 2008

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Apparatus for cathodic protection of steel reinforced concrete structures and method

Koleva, D.A. (author), Hu, J. (author), Van Beek, K. (author), Van Breugel, K. (author), De Wit, J.H.W. (author)

patent 2007

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Dielectric measurements to characterize the microstructural changes of young concrete

Van Beek, A. (author), Milhorst, M.A. (author)

The dielectric properties of concrete can be used to characterize the development of the microstructure of the cement paste. During hydration the microstructure changes and so does the amount of water in the pore structure. The different dielectric properties of the pore water and the solid phases can be measured with microwave frequencies. In...

journal article 2000