Urban water supply infrastructure in Grudziądz (northern Poland): from the Middle Ages to the pre-modern times

This article presents the history of the water supply system in Grudziądz (Poland) over the centuries, from the Middle Ages to the end of the nineteenth century. The location of Grudziądz on the high escarpment of the Vistula River made it difficult to supply water to the town. The innovative technical facilities, such as a water-work and water supply tower had to be constructed because the gravitational waterworks could not be applied. The basis for the research was the analysis of historical sources. In this study, non-invasive methods were used (aerial prospection, LiDAR scanning and geophysical surveys with Ground Penetrating Radar), since the hydrotechnical objects are located in a functioning urban space and no excavations could be carried out. The research included: (i) the measurements, exploration and preparation of photo-documentation of the water tower, (ii) providing a digital model of the tower, (iii) finding the tunnel inside the tower, and (iv) attempting to locate the tunnel's course outside the tower.

Hydraulic engineering analysis of Roman water infrastructure: a review of practice and possibilities

A short review is presented covering English-language publications where quantitative engineering analysis has been used to study and gain insight into how ancient Roman and Mediterranean water systems functioned. The review covers work on using technical engineering perspectives to try and understand the geometrical layout of water systems, quantitative work of a type readily accomplished by undergraduate civil engineering students, such as calculating the flow capacity of aqueducts and other conduits of known dimensions, and more involved studies using computational techniques usually applied by specialist engineers in research or industry. It is concluded that the many different levels of analyses employed have given insight into how Roman water systems worked, for example the amount of water they delivered, and the kinds of issues their designers and operators might have faced. It is hoped that this review will inspire further interdisciplinary study in Archaeohydrology, using modern engineering techniques to amplify and extend the story of Roman water systems told by archaeologists.

The evolution of the Nile regulatory regime: a history of cooperation and conflict

The objective of this study is to trace the historical evolution of the present Nile Basin regulatory framework and examine its influence on the current interactions among Nile riparian states. This research adopts a case-study design, with in-depth qualitative analysis of the Nile Basin as an example of the complex transboundary relations over shared waters. It uses an analytical framework derived from the New Institutional Economics (NIE) to analyse the evolution of the institutional framework that has governed the Nile basin and how it affected the annual water share allocated to each riparian country. The study argues that the historical beliefs and social norms of the riparian societies have been among the major factors that influenced the cooperation attempts during the past century and determined their outcomes. Therefore, a prerequisite to develop sustainable cooperation is levelling the playing field by addressing the beliefs and norms that have prevented cooperation while identifying the beliefs that can support cooperation.

The arbitration of nature: state, water, and civil engineering in Northern Ireland directly after partition

Begun in the summer of 1923, the Silent Valley Reservoir was the first large scale civil engineering project after the division between the North and the South of Ireland. It was the continuation of a previous project. In the late Nineteenth Century a portion of the Kilkeel and Annalong Rivers in the Mourne Mountains had been diverted 35 miles to provide water for the growing industrial city of Belfast in the North of Ireland. A reservoir in the mountains was also planned at a later date but this was delayed by the Great War and then by Irish political instability and the high cost of construction in immediate post war period. Before being completed the project had to overcome several obstacles. Firstly, the Mourne Mountains were claimed by the South of Ireland and thus subject to the Boundary Commission of the Anglo-Irish peace treaty. The Water Commissioners had brought important British political leaders to tour the Silent Valley construction site in an attempt to demonstrate how implausible a situation (in their opinion) that the South should control the major water supply to the capital city of the North. Secondly, shortly after the Boundary Commission was shelved, the combination of fluid subsoil and the failure to locate bedrock at expected depth brought construction to a halt while an engineering, political, and legal solution was sought for the expensive and now publicly controversial project. This article traces the contingent relationship between state (sovereignty) and technology (water reservoir) using a socio legal and socio material description of the crucial arbitration process enabling further time and resources for resolution of the difficulty. Ultimately an air-shaft device for excavating under increased atmospheric pressure had to be designed taking in mind both technical and political difficulties. Today the 3000-million-gallon reservoir, first imagined in the late Nineteenth Century, continues to be a major water source for the city of Belfast.