The permanent adjustment process: A theoretical approach to structural change in commercial ports from the nineteenth century onwards

This article proposes a theoretical approach to the development of Western commercial ports from the Industrial Revolution onwards. It is based both on a bibliographical corpus devoted to port history and on personal research into the main French ports of the nineteenth century. This work was based on two main sources: firstly, the Annales des Ponts et Chaussées, which recorded the experiments and theoretical work carried out by the engineers of this government body; and secondly, the Actes législatifs et Dépenses concernant les Travaux de Navigation Intérieure et Maritime de 1814 à 1900, a document published by the Ministry of Public Works which provides information on the budgets allocated to the main French ports. This reflection shows that since the nineteenth century the development of ports has been subject to a permanent adjustment process, with four main characteristics: disruptive innovation, spatial adaptation, selective adaptation and one-way adaptation.