Numerical calculation of channel dredging volume using 3D digital stratum model |
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| Authors: | Zhengjian Miao Mingchao Li Denghua Zhong |
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| Institution: | (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China) |
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| Abstract: | Prediction of channel dredging volume is critical for project cost estimation. However, many proposed approximate methods
are not accurate. This paper presents a novel numerical method to accurately calculate the dredging volume using a 3D stratum
model (DSM) and a channel surface model. First, the 3D DSM is constructed rapidly yet accurately from non-uniform rational
B-splines (NURBS) surfaces through Boolean operation between a physical terrain model and a stratum surfaces model. Then,
a parametric channel surface model is built from cross-section data and a channel center line using code implemented in the
VC++ programming language. Finally, the volumes of different types of physical stratums can be calculated automatically and
hierarchically to determine the dredging volume. Practical application shows that the DSM method is more precise and faster
compared to the section method, and that the implementation of the developed software provides an interactive graphical user
interface and visual presentation. |
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| Keywords: | dredging volume numerical calculation digital stratum model parametric modeling surface integral |
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