10,342 Works

measured wind-wave climatology Lake IJssel

M. Bottema
Temperature, wind, wave and waterlevel data from IJsselmeer in period 1997-2006

Laboratory experiment of a mixed-sediment Gilbert delta under varying base level

V. Chavarrias, A. (Astrid) Blom, C. Orru & E. Viparelli
The objective of the present study is to provide detailed data from a laboratory experiment on how the stratigraphy of a Gilbert delta deposit is affected by a temporal variation in sea level. The experiment was conducted in the Water Lab of the Department of Hydraulic Engineering of Delft University of Technology. The flume has an effective length of 14.2 m and a width of 40 cm. Three wellsorted grain size fractions were used: 0.8-1.2...

Steenstabiliteit in een turbulente stroming achter een afstap

M. (Mieke) de Gunst
measurement of stone transport behind a backwards facing step in a scale model in the lab. Measurement of flow and turbulence

Wave overtopping at rubble mound breakwaters with a non-reshaping berm

J.C. [Jan Kees] Krom
Wave overtopping was investigated by means of a physical model. The breakwater scale model was divided into 8 collection bins. Overtopped volumes were collected and pumped into floating tanks further down the flume. After the experiment the mass of the floating tanks was measured and the mean overtopping discharge could be determined for 8 horizontal positions on the breakwater. The measured total overtopping discharges cannot be predicted accurately by existing prediction methods. On the basis...

Limpopo National Park (Mozambique) Soil Organic Carbon study

A. H. (Armindo) Cambule & David G Rossiter
410 field observations of topsoils in Limpopo National Park (Mozambique), 128 of which were analyzed by wet chemistry for ph, soil organic C, sand, silt, clay; all of which have predicted soil organic C concentration by lab. spectroscopy calibrated with lab. analysis

The influence of core permeability on the stability of interlocking, single layer armour units

I. (Ilse) Verdegaal
The permeability of a breakwater is of great importance for the stability of the armour layer. The influence of the structural permeability on the stability of rock armour units was already researched by Van der Meer using the 'notional' permeabiltiy. However, for single layer interlocking armour units the influence core permeability is rather unfamiliar. The goal of this research is to extend the knowledge on the failure mechanism of the armour layer for different structural...

Extraction Force Xbloc: Model Tests

M. (Marco) De Lange
This study describes the influence of the slope angle of a breakwater slope, the density of the concrete of the Xbloc armour unit, the vertical position of the Xbloc on the breakwater slope and the roughness of the under layer of the breakwater on the extraction force of an Xbloc armour unit. By testing the extraction force, indirectly the influence of all parameters above on the Xbloc unit interlocking capacity can be described. This research...

Safety assessment of sea dikes in Vietnam; a case study in Namdinh Province

Mai Van Cong
Dataset with coastal data from Vietnam, cross sections of many Vietnamese seadikes; economical data of the coastal zone

Effectiveness of Silt Screens

M. (Max) Radermacher
A large series of numerical simulations with varying flow velocity, screen height, screen width, settling velocity of the sediment, water depth and upstream sediment concentration profile is conducted. The process of vertical diversion is investigated in a 3D modeling approach using large eddy simulation (LES). Performance of this numerical model is validated by means of laboratory experiments. The process of horizontal diversion is assessed with a two-dimensional horizontal (2DH) modelling approach.

Cobble Sea Defence: Hydraulic Interface Stability of Sand underlying a Single Filter Layer

A. (Arthur) Zoon
A cobble sea defence appears to be an easy constructible protection, with relatively low total costs of ownership. Flume tests show that sand under such single layered constructions is stable. However, it is not exactly known how the hydraulic loading of a breaking wave is reducing in the filter. Two datasets containing pressure measurements in a revetment were available for identification of this reduction. The first set is a dataset of a test performed in...

Stability of a single top layer of cubes

R.V. (Robin) Van Buchem
All conclusions in this thesis have been based on model tests, in which the cubes were placed by hand and placed in a stretching bond (half-steensverband). In total eighteen tests were performed in the wave flume of the Fluid Mechanics Laboratory of the Faculty of Civil Engineering and Geosciences. Two different slopes were tested together with three different packing densities and three different wave steepness. It was found that the gentler slope did not contribute...

Open filters in breakwaters with a sand core: study into the stability of granular geometrically open, hydraulically sand-open filters in breakwaters with a sand core

W.J. (Wouter) Ockeloen
Physical model tests for this study have been performed in the long sediment transport flume of the Fluid Mechanics Laboratory. This flume is equipped with a wave generator that loads the structure with the desired wave spectrum. The results have been analysed for relations between loading and erosion.

Numerical and experimental research of wave interaction with a porous breakwater

B.A. (Bart) Mellink
The design formula for rubble mound breakwaters by Van der Meer has an unclear Notional Permeability term. This term causes a lot of confusion for designers. In the past many people have tried to derive a better formulation for that term by experimental and analytical research. The goal of this study was to obtain a better formulation along a numerical way. This study explores the numerical possibilities and tries to define which direction has to...

Breakwater stability with damaged single layer armour units

R.A. (Richard) De Rover
The main objective of this research is to determine the effect of single layer armour unit breakage on the hydraulic armour layer stability and potential damage progression. A 2-dimensional model of a rubble mound breakwater with typical cross section was tested with individual and clustered positioned broken Xbloc armour units around the still water line. The residual stability of the armour layer was determined. The armour unit displacement and damage progression was assessed. It is...

Modeling the Evolution of the Wax Lake Delta in Atchafalaya Bay, Louisiana

K.C. Hanegan
In this study, a process-based, depth-averaged Delft3D hydrodynamic and morphologic model of the Wax Lake Delta in Atchafalaya Bay, Louisiana was developed to simulate a five year period of delta development. The purpose of this modeling effort was to test the ability of process-based modeling tools to successfully simulate typical delta-building processes and the resulting morphologic and stratigraphic characteristics of the delta. Recent developments in conceptual modeling of mouth bar formation and full delta development...

Maisbich (Luxemburg) temperature data, sensor 1209370_road, month 2009-03

W.M.J.(Wim) Luxemburg & M.C.(Martijn) Westhoff
Parent item: Maisbich (Luxemburg) temperature data, sensor 1209370_road Measuring instrument: Temperature sensor 1209370_road, Maisbich (Luxemburg) Temperature sensor,TidbiT v2 temp logger: Hobo USA. Temperature of stream water at ca 280 m from V-notch weir Q3

Maisbich (Luxemburg) river basin discharge data, sensor Q3, month 2009-12

W.M.J.(Wim) Luxemburg & M.C.(Martijn) Westhoff
Parent item: Maisbich (Luxemburg), data from discharge meter Q3 (Qdown), 2006-11 and later Measuring instrument: Maisbich basin: V-notch discharge meter Q3 (Qdown) Type: Pressure Sensor Keller DCX-4.0, SN 1467 This instrument is based on differential pressure measurement of two absolute sensors. The sensors measure pressure and temperature. Height of V-notch above sensor: -0.0015m. Datasets with correction contain the corrected discharge observed at the Vnotch. The discharge is calculated as Q=Cd*h^2.5 After correcting the logger measurements...

Maisbich (Luxemburg) river basin discharge data, sensor Q3, month 2007-09

W.M.J.(Wim) Luxemburg & M.C.(Martijn) Westhoff
Parent item: Maisbich (Luxemburg), data from discharge meter Q3 (Qdown), 2006-11 and later Measuring instrument: Maisbich basin: V-notch discharge meter Q3 (Qdown) Type: Pressure Sensor Keller DCX-4.0, SN 1467 This instrument is based on differential pressure measurement of two absolute sensors. The sensors measure pressure and temperature. Height of V-notch above sensor: -0.0015m. Datasets with correction contain the corrected discharge observed at the Vnotch. The discharge is calculated as Q=Cd*h^2.5 After correcting the logger measurements...

Maisbich (Luxemburg) temperature data, sensor 1209368_Mai11, month 2009-07

W.M.J.(Wim) Luxemburg & M.C.(Martijn) Westhoff
Parent item: Maisbich (Luxemburg) temperature data, sensor 1209368_Mai11 (T 178m inflow) Measuring instrument: Temperature sensor 1209368_Mai11 (T 178m inflow), Maisbich LUX Temperature sensor,TidbiT v2 temp logger: Hobo USA. Temperature of lateral inflow at 178 m downstream of V-notch weir Q4

Measured data from sensor IMD at Huewelerbach2 for month 2004-12

A.M.J.(Miriam) Gerrits
Parent item: All data measured by interception measurement device in Huewerbach basin Measuring instrument: Huewelerbach basin: Interception measurement device According to original data the location is Westerbork NL but this is probably wrong Evaporation measument. Area basin 1.00 m2, 2x3 strain gauges: type FLA-6, resistance 120 Ohm. Valve (< 18 jan 2006): electronic magnetic valve Type: MBMG2Z-1263008-12V. (KOBOLD Instrumentatie BV, Arnhem) Valve (>=18 jan 2006): electronic magnetic valve (12VDC) Type: MBMG2Z-1264020. Messing 3/4 " (KOBOLD...

Calculated data from sensor Q2 at Maisbich for month 2005-04

W.M.J.(Wim) Luxemburg & Cees-Anton van den Dool
Height V-notch above sensor 0.017 m Parent item: Maisbich (Luxemburg), calculated data from discharge meter Q2 Measuring instrument: Maisbich basin: V-notch discharge meter Q2 Type: Pressure Sensor Keller DCX-4.0, SN 1466 This instrument is based on differential pressure measurement of two absolute sensors. The sensors measure pressure and temperature. Height of V-notch above sensor: -0.017m. Contributor: Durr, E.H.(Eugene)

Measured data from sensor GRW21 at Maisbich for month 2006-04

W.M.J.(Wim) Luxemburg & Cees-Anton van den Dool
Height piezometer above sensor1.25m Parent item: All data measured by groundwater level piezometer GRW21 at Maisbich Measuring instrument: Maisbich basin: Groundwater level piezometer Code: GRW 21 Type: Temperature and Pressure sensor Make: Keller DCX-22 AA This instrument is based on differential pressure measurement of two absolute sensors. The sensors measure pressure and temperature. Height of piezometer above sensor: 1.18m.

Maisbich (Luxemburg) temperature data, sensor 1239545_SPOT_upstr, month 2010-08

W.M.J.(Wim) Luxemburg & M.C.(Martijn) Westhoff
Parent item: Maisbich (Luxemburg) temperature data, sensor 1239545_SPOT_upstr (T 104m up) Measuring instrument: Temperature sensor 1239545_SPOT_upstr (T 104m up), Maisbich LUX Temperature sensor,TidbiT v2 temp logger: Hobo USA. Temperature of stream water just upstream of lateral inflow at 104 m downstream of V-notch weir Q4

Calibrated DTS data, Maisbich, 2010-10

W.M.J.(Wim) Luxemburg & M.C.(Martijn) Westhoff
Calibrated fibre optic Distributed Temperature Sensing (DTS) data, Maisbich, Luxemburg Parent item: Calibrated fibre optic Distributed Temperature Sensing (DTS) data, Maisbich Explanation of the calibration procedure of the DTS derived temperatures in the Maisbich river, Luxembourg. Note that it only corrects offsets orriginating from the DTS device (Halo, Sensornet, UK). It does NOT correct for periods when the cable is not properly submerged in the stream. The DTS obtained temperatures were calibrated with five independent...

IDRA weather radar measurements - day 2011-03-30

T.(Tobias) Otto & H.W.J.(Herman) Russchenberg
Radar range: standard. Max rain level: moderate rain. Parent item: IDRA weather radar measurements - month 2011-03 Measuring instrument: IDRA atmospheric radar in CESAR observatory, Cabauw IRCTR has built a high resolution radar system, IDRA (IRCTR Drizzle Radar), aimed at the detailed observation of the spatial and temporal distribution of rainfall and drizzle. The system was placed at the end of August 2007 on top of a 213 m high meteorological tower in the CESAR...

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