Services and electrical
Water distribution system diagram (zone A, supply population 12,000)
A town water distribution network from treatment works through service reservoirs and trunk mains to each supply zone, with the ground level of every zone
This drawing comes from one YAML file. No shape was moved by hand.
Notes in the source (in Japanese)
水は、ポンプではなく高さで配る。浄水場から送水ポンプで配水池まで押し上げ、そこから先は重力で落とす。だから配水池の水位が、給水区域の水圧を決める。
同じ配水池から配っても、低地では水圧が上がりすぎて器具が壊れる。圧を下げる場所を図に置くのは、そのため。
仕切弁は断水の範囲を区切る（故障した区間だけ止める）。空気弁は管の高い所にたまる空気を抜く（残ると水が流れない）。消火栓は配水管から枝を出して付ける。水は消火栓を通って家へ行くのではない。空気弁も同じで、管の上に付けるもの —— 水が空気弁を通って給水区へ行くのではない。どちらも位置に意味があるので、系統図では省けない。
Source (YAML)
examples/gallery/35-配水系統図.zumen.yaml
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