Max Mayr (hydraulic engineer)

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Max Mayr (born February 23, 1853 in Landsberg am Lech ; † February 15, 1916 in Munich ) was a German hydraulic engineer .

Life

In the course of his career, Mayr was Ministerialrat in the royal Bavarian Ministry of the Interior in Munich. In 1909, he dismissed the royal section of torrents in Rosenheim on glacial processes in the 1.8 km of the Tiroler Ache before it flows into the Chiemsee to investigate. His measures in the area of river engineering on the Inn and the Salzach were minimized. In order to avoid the laborious relocation of the rivers during the winter months for the installation of the river bed, he had rammed concrete base plates (sink stones, forefoot plates) made along the shoreline of the low water level, behind which he had stone landfills built on the land side (stone claws). As the riverbed deepened, the sinking stones were supposed to slide to their destination and hold back the quarry stone that had accumulated behind. In 1899, on the occasion of the flood of the Inn, he earned services to the city of Traunstein on the board of the royal road and river construction office, which were honored in 1908 with the award of honorary citizenship.

In 1919, the groundwater conditions of the Erdinger Moos and the Middle Isar, determined posthumously under his aegis, were reproduced as part of a feasibility study for the Middle Isar Canal .

Individual evidence

  1. Handbook of engineering in five parts, 1921, p. 41 [1]
  2. ^ "Elements of hydraulic engineering for students, [2] ; W. Engeelmann, Der Wasserbau, Der Flussbau, 1910, p. 173
  3. ^ Paul-Gerhard Franke , Outline of the hydraulic system in 10 parts, Bauverlag Wiesbaden 1969–1975, new editions 1975–1982 .; Franz Praesil and Konrad Pressel - authors of two basic treatises on water lock calculation; Anton Schmid: Munich contributions to the calculation of mirror movements in moated castles. - In: Informationsber. d. Bayer. State Office f. Water management Munich 1983 in water locks, information report of the Bavarian State Office for Water Management No. 3/1983, pp. 117–127
  4. The honorary citizens of the city of Traunstein: Max Mayr, October 11, 2008, [3]
  5. The use of the groundwater flow when expanding the middle Isar is discussed by Mayr in Bavaria. Industrie- und Gewerbeblatt: The Erdinger Moos and the Middle Isar, As already known, in the Erdinger Moos a storage basin about 10 km long and 1 km wide with approx. A volume of 32 million m3 was created, while the cleaning of the Munich wastewater, according to Prof. Bruno Hofer , is to be carried out using upstream fish ponds. In order to create this reservoir, the groundwater flow must be intercepted by a 10 km long and 8 m deep intercepting channel that cuts into the groundwater flow. The possibility of using the Erdinger Moos, measuring 240 km2, depends on the groundwater flow that arises south of Munich in the gravel deposits of the old moraine belt from Wolfratshausen to the Mangfallknie, where it is about 24 km wide, which is 19 km further along the river Deisenhofen reduced to 11 km near Freising, supported by an impermeable layer of flax. The flow speed is about ½ m / s, the time to flow through the entire 56 km length so approx. 3½ years, around 8 hours in the Isar. The rise of the groundwater flood a day averages 2.5 cm, the fall is 4 cm. The lowest observed groundwater level (1885) at Eglfing was 523.0 m, the highest level (1900) was 527.5 m The level of the groundwater flow lies between 40 m and 4 m below the surface of the ballast. The amount of water carried by the groundwater flow is calculated to be around 24 m3 / s with a thickness of 12 m at high tide and around 12 to 15 m3 / s at low tide Journal for the entire turbine system, in connection with water and heat management, 1919, [4] [5]