Adding Dynamics to the Camp Model for the Calculation of Overflow Losses
An IADC "Most Promising Student" Award has been presented to a graduate of TU Delft for his thesis which describes the dynamics of hopper loading both in simulation and as compared with actual measurements onboard a TSHD.
Adverse Physical Conditions and the Experienced Contractor Test
Standard dredging contracts do not necessarily take into account “unforeseeable” soil conditions which can cause serious financial uncertainties. The time to consider these issues is before work commences.
Adverse physical conditions: Legal development and changes in risk profiles
In the past decade, there have been noteworthy advances in case law with respect to adverse physical conditions as well as the development and use of digital ground models that have become more widespread. This article looks at the development and changes in risk profiles that may result due to these two developments.
Aerial Survey Techniques Applied for Stockpile Progress Measurements
Multicopters, unmanned aerial surveyors, can fly and take pictures in difficult-to-reach or potentially dangerous areas, improving the speed and safety of acquiring data.
An Analytical Approach to the Sedimentation Process in Trailing Suction Hopper Dredgers
A number of theories are used (Camp, Groot, Miedema and Vlasblom, Yagi, Braaksma, Ooijens and van Rhee) to determine the overflow losses when loading trailing suction hopper dredgers. The model derived here has several important improvements, including the speed of doing the calculations.
An efficient tool for environmental control in dredging operations
Environmental management and monitoring programmes are essential for identifying and mitigating adverse impacts that dredging activities may have on the environment. However, it is not always feasible, especially for the client, to have the necessary tools to conduct these tasks adequately, whether due to cost constraints or limited information availability. The use of the Automatic Identification System (AIS), as an efficient and cost-effective monitoring method in dredging projects, can lead to significant improvements in project environmental management. In cases involving trailing suction hopper dredgers (TSHD), this tool allows for equipment tracking, verifying the proper use of contract-approved areas and additionally estimating daily production values through a simplified method.
An Evaluation of the Behaviour of Pollutants During Dredging Activities
Two main classes of pollutants, heavy metals and organic micropollutants, are evaluated to determine the extent of environmental risks when dredging and how these can be controlled.