Building and Evaluating Borehole-Image-Constrained Facies Models of a Complex Channelised Slope System, Karoo Basin, South Africa

As hydrocarbons become scarcer, submarine channelised slope systems have become a focus of exploration due to their reservoir potential. Outcrops of both levee-confined (Unit C) and entrenched (Unit D) channel systems are exposed in the Permian Fort Brown Formation, Karoo Basin, South Africa and have been extensively studied and interpreted....

Bow Thruster Currents at Open Quay Constructions on Piles

Research into hydraulic loads by a bow thruster. The hydraulic loads on the slope at an open quay construction on piles is investigated. The propeller (bow thruster) jet induces hydraulic loads on the bed, which could result in scour holes and damage to the quay construction. Performed scale model tests provide details about the hydraulic loads...

DLL Based Single Slope ADC For CMOS Image Sensor Column Readout

This thesis presents a Delay Locked Loop(DLL) based Single Slope ADC. Compared to the convertional Single Slope ADC, the readout speed is increased by 16 times. A DLL is designed with a start-controlled Phase Frequency Detector (PFD), a differential ended Charge Pump (CP) and fully differential Delay Cells (DC). The multi-stage comparator with...

Borehole Images and Logs: Tools to Constrain the Architecture of a Channelized Slope System, Karoo Basin, South Africa

The SLOPE3 project investigates the depositional architecture of a Permian age, deep water / complex channelized slope system which is of interest to the oil industry as a potential analogue for real oil / gas reservoirs. This study forms a part of the SLOPE3 project and is focused on an integration of cores and wireline logs from six research...

Wave impact on grass covered outer slopes

Against the background of enhanced hydraulic loads due to climate change there will be a need for improvement of the flood defence system in the Netherlands in the future. These days there is a growing interest in grass as a dike cover because it is a cheap and a sustainable dike protection. Yet at the moment there is a hiatus in the knowledge...

Velocity and flow depth variations during wave overtopping

Nowadays the protection of our country for high sea levels and heavy storms is daily news. The ComCoast project (COMbined functions in the COASTal defence zones) is originated by ten organisations out of five European countries bordering the North Sea coasts in order to develop innovative solutions for flood protection in coastal areas. Instead...

A clay layer as a revetment for sea dikes: The behaviour of clay under wave loading

Environmental awareness and sustainable development have been popular themes over the last few years. To improve dikes along the estuaries in Zeeland (The Netherlands) where a high foreland with natural areas of salt marshes is present, alternatives to stone revetments are examined. From a natural and aesthetic point of view, a slope covered...

Wave run-up on a rough, permeable slope of a rubble mound breakwater

Although a lot is known nowadays about the run-up on smooth and impermeable slopes as well as the run-up on slopes covered with a rock armour layer, the physical properties of the armour layer of a rubble mound breakwater are not incorporated in the relations describing the run-up on a breakwater’s slope. The roughness of a slope and its...

Run-up tests on a permeable slope

This report is the result of the Master of Science thesis of the author, at the Delft University of Technology, sub-Faculty of Civil Engineering. Although a lot is known nowadays about the run-up on smooth and impermeable slopes as well as the run-up on slopes covered with a rock armour layer, the physical properties of the armour layer of a...

Flow slide failure of excavated subaqueous slopes

Unexpected failure of subaqueous excavated slopes in the form of flow slides is considered in this graduate study. Excavated slopes are not the same as slopes constructed by means of hydraulic fill. Several recent flow slide failures in sand borrow pits, together with qualms in engineering practice about not knowing exactly what fundamental...

Wrijvingskrachten op het binnentalud van een dijk ten gevolge van golfoverslag en het ontwerp van een schuifspanningsmeter ter meting van die krachten

Hoe evenwichtsverlies bij golfoverslag ontstaat en welke krachten daarbij een rol spelen is onduidelijk. In dit rapport is onderzocht hoe groot de wrijvingskrachten op het binnentalud van een dijk zijn ten gevolge van het overslaande water. Omdat dit probleem niet toegankelijk is voor berekening, zijn een aantal proeven gedaan. Hiertoe is een...

Mass transport in gravity waves on a sloping bottom

Summary of the graduation work published at the ICCE: In the present investigation the influence of bottom slope on mass transport by progressive waves was investigated, both theoretically and experimentally. Theoretical considerations based on linear wave theory show the greatest influence of the slope on the bottom drift velocities for...