Shizu Shiraki

Biography

Former student of the Polytechnic school (promotion X1846) and of the School of the Highways Departments, Henry Bazin is Engineer with Tonnerre then with Dijon. He is there charged in 1854 service with the Canal of Burgundy. Named chief engineer of the bridges and fitted with Dijon in 1876, then promoted general inspector in 1886. With its retirement, it is established with Chenôve.

Work of engineer Henry Bazin

With li' sweats as of its studies at the school of the Highways Departments, Henry Bazin is named in 1851 civil engineer of 3rd class, at the station of Saint-Flour, city which he will leave at the end of a few months for Aurillac, then for Tonnerre in 1853, affected with the Canal of Burgundy, person in charge of the slope " Yonne " of this 242 km length work. Again transferred in March 1854, it is named with Dijon to deal with the slope Côte of Gold: maintenance of banks, of the locks (there are of them 76 between Pouilly and Saint-Jean-with-Losne), of the 72 levels and the tanks.

In 1857, it is named Directeur of the service of water of the town of Dijon. It will deal of the public fountains and the drinking water network. Always in load of the Channel of Burgundy, it makes increase between the 1971 and 1875 tank of Panthier, tripling its capacity which passes from 3 to 9 million meter-cubic. In 1867, the warping one with vapor replaces traction with hand of man in the tunnel of Pouilly. A metal chain was installed at the bottom of the channel, the tug boat (warping) clings and tractor draws to it from one to 10 barges.

In 1878, it becomes responsible for the totality of the channel. It makes install a stopping in the valley of the Armançon, which will be completed in 1882. In 1879, it begins the setting with the " gauge Freycinet " locks: the barges will measure from now on 38 meters compared with 30 meters for the Burgundian barges. Work is considerable: 189 locks to be transformed while starting by diverting water, by disturbing the least possible traffic (and without hoping several bridges to be raised). By stopping the traffic only two months each summer, work will be completed in 1882.

Work of the researcher Henry Bazin

Attracted all his life by pure mathematics, Henry Bazin published since 1851 an article on " the relative question with the déterminants" in the Newspaper of Mathematics Pure and Applied published by Joseph Liouville. It corresponds regularly with his comrade of promotion Charles Hermite on subjects of pure mathematics. In 1863, it translates into French the higher algebra of George Salmon.

But it is on its arrival with Dijon that it starts to collaborate in the searches of Hydrodynamique of its hierarchically superior, Henry Darcy, which it will succeed. Henry Bazin continues and develops his work of Hydraulique. He sticks particularly to the water run-off in the channels discovered. Its formula (known as formula of Bazin), which generalizes that of Antoine de Chézy, remains universally applied by all the engineers hydraulicians. It is systematically applied for the study of the networks of sewer.

The majority of the experiments carried out at the time of its research take place on drains close to the Canal of Burgundy (Colombière with Dijon) and tanks of Grosbois and Chazilly.

Elected official member not residing of the Academy of Science the May 5th 1913

Formula of Bazin : $C = \ frac {87} {1 + \ frac {m} {\ sqrt {R}}}$ (C: coefficient of Chézy, m depends on the wall, R: hydraulic ray)

Publications

Hydraulic Research - with the assistance of Henry Bazin - who is a report/ratio of the results obtained on the study of the open flow of channel, experiment conceived with the assistance of Darcy. 1865
Report/ratio with the movements and the wave propagation . Academy of Science , Paris, 1865.
Experiments on the wave propagation along torrent-like river, and confirmation, by these experiments, of the formulas given by Mr. Boussinesq in his theory of the gradually varied movement of the fluids . 1885. CRAS
new Experiments on the distribution speeds in the pipes. 'Memories presented by various foreign scientists to the Paris, Academy of Science, 1902.

See too

Joseph Boussinesq
Burgundian Soliton
Scientific

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