{{Short description|River in Switzerland}} thumb|The Grosse Melchaa in Ranft, ca. 1825.

The '''Grosse Melchaa''' (also '''Melchaa''') is a 18.5&nbsp;km long affluent of the Lake Sarnen in the Canton Obwalden, Switzerland.<ref name="bafu">{{cite web|title=Modellierter mittlerer jährlicher Abfluss|periodical=Topographische Einzugsgebiete der Schweizer Gewässer: Teileinzugsgebiete 2 km²|publisher=|url=https://api3.geo.admin.ch/rest/services/ech/MapServer/ch.bafu.wasser-teileinzugsgebiete_2/26980/extendedHtmlPopup?lang=de|url-status=dead|format=|access-date=2017-08-13|archive-url=https://web.archive.org/web/20170813231621/https://api3.geo.admin.ch/rest/services/ech/MapServer/ch.bafu.wasser-teileinzugsgebiete_2/26980/extendedHtmlPopup?lang=de|archive-date=2017-08-13|last=|date=|year=|language=|pages=|quote=}}</ref>

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{{coord|46.8812|8.2419|format=dms|type:river_region:CH|display=title}}

Category:Reuss basin Category:Rivers of Obwalden Category:Kerns, Switzerland

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