They had no confidence in the city engineers, who were perceived as less qualified.īuilt between 18, this infrastructure, with a storage capacity of 2,000,000 cubic meters still used today, has allowed the efficient control of suspended sediments transported and thus solve in large part problems of water clarification. From an administrative point of view, let’s note that whereas the daily management of the canal was put in the hands of both a director and the municipal water supply service of Marseille, such technical questions were frequently settled by local representatives of the French national engineering corps of Ponts-et-Chaussées (bridges and roads). To address this pressing issue, city engineers therefore decided in 1875 to construct a new structure, both a reservoir and a sedimentation tank, equipped with a pioneering desilting and emptying system 300 meters south of the Durance River, in the small valley of Saint Christophe closed by an embankment dam. This work is licensed under a Creative Commons Public Domain Mark 1.0 License. Recurrent desilting campaigns of this last one did not yield the expected results and did not ultimately prevent its almost total siltation. The first collapsed and the other four silted more or less rapidly before being decommissioned only one reservoir-the Réaltor-continued to function but in a very limited way. But, as suspended sediment fluxes were strongly underestimated, these infrastructures, badly designed with very low capacities, were no longer usable after a few years. Yet, five storage and sedimentation reservoirs had been originally built along its course in order to allow deposition of sediments before water distribution. “It was then an ugly blackish mud flowing in pipes with difficulties” reported in 1867 Mr. In the 1860s, according to several observations, the water from the canal was turbid approximately 270 days per year and shady the remaining time. Thus, the hard water, as delivered to the consumer, was difficult to use for most of the year both for drinking, industry, and watering young crops. A strong erosion process in unvegetated marlstone areas in the catchment was the major source of this trouble. The water taken in the north of the Provence from the lower Durance River was often heavily loaded with suspended sediments, especially during high-flow periods. However, although the almost unlimited water supply (with a flow rate varying between 7 to 10 cubic meters/second) without drying up the river channel quickly calmed the concerns of the municipal council, other environmental issues related to its quality appeared as soon as the new aqueduct was finished. Up until this epoch, water resources consisted of an old and damaged medieval aqueduct supplying water from a small river located west of the city, some karstic springs but especially many public and private wells providing ground water of poor quality. Indeed, during the first quarter of the nineteenth century, shortages were particularly acute in this major coastal city that experienced a high population growth, inducing health problems (e.g., cholera and thypoid fever outbreaks) as well as causing social and economic issues.
Operational since 1847, the 80 kilometer long Canal de Marseille, built by famous Swiss civil engineer Franz Mayor de Montricher, has allowed great improvement in the water supply in the city of Marseille, southeast of France. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Inventor Roland Marinus Theodorus Govers Jean Michel Brunel Original Assignee Universite Nice Sophia Antipolis Universite D'aix-Marseille INSERM (Institut National de la Santé et de la Recherche Médicale) Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents WO2013057422A1 - Anti-diabetic aminosteroid derivatives WO2013057422A1 - Anti-diabetic aminosteroid derivatives