翻訳と辞書 Words near each other ・ Upper Gwynedd Township, Montgomery County, Pennsylvania ・ Upper Hack Lift ・ Upper half-plane ・ Upper Halliford ・ Upper Halliford railway station ・ Upper Hammonds Plains, Nova Scotia ・ Upper Hanover Township, Montgomery County, Pennsylvania ・ Upper Hanson Lake ・ Upper Harbledown ・ Upper Harbour (New Zealand electorate) ・ Upper Harbour Bridge ・ Upper Hardres ・ Upper Harker Lake ・ Upper Hartfield ・ Upper Harz ・ Upper Harz Ditches ・ Upper Harz Mining Museum ・ Upper Harz Ponds ・ Upper Harz Water Regale ・ Upper Harz Water Tunnels ・ Upper Hat Creek ・ Upper Helmsley ・ Upper Hermitage, South Australia ・ Upper Hesse ・ Upper Hessian Railway Company ・ Upper Hessian Ridge ・ Upper Heyford ・ Upper Heyford, Northamptonshire ・ Upper Heyford, Oxfordshire ・ Upper Highway Area Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Upper Harz Ditches ： ウィキペディア英語版 Upper Harz Ditches The Upper Harz Ditches ((ドイツ語:Oberharzer Gräben)) are hillside ditches, running roughly parallel to the contour lines, that were laid out in the Upper Harz in Germany from the 16th to the 19th centuries to supply water power to the silver mines there. They are an important component of the Upper Harz Water Regale, a historical water system that is now a cultural monument. == Design == The ditches consist of a trench and an embankment (''Grabenbrust'') next to it, made of spoil piled up when the ditch was excavated. The embankments are frequently protected from erosion by a dry stone wall. In most cases, they also act as inspection paths for the ditch keepers (''Grabenwärter'') and, today, as public footpaths. The ditches are only inclined at about 1–2 ‰ (i.e. about 1 to 2 millimetres per metre). As a result they run almost parallel to the contour lines of the terrain. As protection against seepage the embankment and bed of the ditch are usually sealed with grass sods or clay. At inlets, where the ditch crosses forest streams, there are so-called ''Fehlschläge'', small weirs, by which the water flow in the ditch can be regulated. When water levels are high these have to be opened, i.e. the boards controlling the flow must be removed. The hydraulic capacity of most ditches is between 100 and 200 litres per second; on the Rehberg Ditch it is up to 600 l/s and on the Dyke Ditch up to 1000 l/s. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Upper Harz Ditches」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.