PIANC Smart Rivers 2022

Reviewing Presentation documents

Topic:

Title:

Author(s):

Author 1

Name：

Affiliations：

Region：

Email：

Is corresponding author or not (one only)：

Author 2

Name：

Affiliations：

Region：

Email：

Is corresponding author or not (one only)：

Author 3

Name：

Affiliations：

Region：

Email：

Is corresponding author or not (one only)：

Author 4

Name：

Affiliations：

Region：

Email：

Is corresponding author or not (one only)：

Abstract : *(250~1000 words)

Traversing the river Seine in Paris is challenging for inland navigation vessels due to the density and diversity of local traffic and the variety of manoeuvres that are encountered. On top of that, there is a high number of historically important bridges, where traffic has to pass underneath narrow arches, while taking into account delicate current conditions on a bending trajectory. Some decades ago, regulations concerning the maximum ship dimensions depending on the water level of the river were put in place to ensure the safety of navigation. However, with increasing capacity demand and with new types of ships plying the waterway, the question arose whether the regulations are still up to date. To this end, the waterway authority, Voies Navigables de France (VNF), commissioned a study to assess the relevance of these regulations when present and future vessels of varying types and dimensions cross Paris. The study is coordinated by International Marine and Dredging Consultants (IMDC) in collaboration with its subcontractors: Ghent University, Flanders Hydraulics Research and Siradel.

This paper presents fast time and real time simulations to assess the maximum dimensions of ships crossing the Seine in Paris. A model of the current flow representing all possible navigation conditions, has been implemented using a 2D hydraulic model. In a first phase, fast time simulations were executed with a track controller allowed to identify bottlenecks for ECMT class Va of 135 m, 125 m and 110 m long on the full length (12 km) of the river Seine in Paris in different current conditions to optimize simulator time for real time simulations. Based on those results, critical scenarios were selected to be tested on a full mission bridge simulator. The real time simulations were carried out by skippers familiar with the crossing of Paris and their feedback was taken into account in the analysis. Inspired by PIANC INCOM WG 141 Detailed Design and Safety and Ease Approaches, the main challenges related to the simulation setup and the assessment methodology  are presented and discussed in this paper. The simulations have shown that the main bottlenecks are related to the succession of passages under narrow bridges with non-aligned openings. Maximum water levels for which safe passage is possible, were determined for each ship type  and compared with the actual regulations. Finally, recommendations have been formulated, which were then discussed with VNF and the stakeholders.

Key words: (max: 5)

Reference no.

Slides：

click to download