Editing Olst-Wijhe (section)

==Geographical features==
[[File:Olst ijssel.jpg|thumb|left|220px|IJssel River]]
Olst-Wijhe is dominated by river [[IJssel]], which partly flows through it and partly forms the border between the provinces Overijssel and Gelderland. Although this border largely runs along river IJssel, there are two left-bank [[exclave]]s opposite the towns of Olst and Wijhe, in which the villages of Welsum and Welsumerveld (south exclave) and Marle (north exclave) are situated. There are [[cable ferry|cable ferries]] between Olst and Welsum and between Wijhe and Vorchten in the municipality of [[Heerde]] (there is no direct connection between Marle and the rest of Overijssel).

Olst-Wijhe is part of the low-lying [[Salland]] region. The one metre above mean sea level [[contour line]] runs roughly parallel to the river; the municipality's interior is characterised by flat or gently rolling grasslands and woodlands at about 10–15 metres above mean sea level.

Apart from river IJssel, several more streams flow through the municipality's territory. They are called ''wetering'' ("drainage waterway") and are amalgamations of natural streams gradually [[Channelization (rivers)|channelised]] from the 18th century onwards and specifically dug canals<ref name="hilferink">{{cite book |last=Hilferink |first=J.D.|title=Geschiedenis van Olst |year=2009 |publisher='t Olster Erfgoed |location=[[Olst]]|language=nl }}</ref>
. From west to east, these are Zandwetering, Soestwetering, Groote Vloedgraven, Oude Wetering and Nieuwe Wetering. All these streams flow in a south–north direction and come together at one point or other to eventually form the [[Zwarte Water]] river near the city of [[Zwolle]]. On the left side of river IJssel, near the exclave of Welsum, there are several more ''wetering'' streams, all but one of them on the Gelderland side of the border; the exception being the easternmost of these, the Terwoldsche Wetering, which forms the border between Olst-Wijhe and Voorst.