Overview: This central sub-watershed lies north of Medicine Hat and extends into parts of the Alberta–Saskatchewan border region. It’s marked by a semi-arid climate, gently rolling terrain, and occasional desert-like sand dunes, particularly the Middle Sand Hills.
Landscape & Ecology: Much of the land is glacial till or ancient glacial lake deposits, with coulees that drain into the river. Surface water bodies are limited; many closed depressions collect runoff seasonally. The rarity of active sand dunes in the region adds unique ecological value.
Key Challenges: Because of the low precipitation and semi-arid conditions, water supply is tight. Agricultural and municipal uses dominate; water quality is strongly affected by upstream flow controls, suspended solids from spring runoff, and variable groundwater contributions.
Why it matters: This segment acts as a transition zone between the upstream water sources and the plains further east. It supports unique landforms (sand hills), and because it straddles provincial borders, cooperation across jurisdictions is essential.