용인시 남서부 진위천 주변은 대부분 충적층이며, 북서부 탄천과 신갈천 주변에 일부 분포한다.
The area around Jinwicheon Stream in the southwestern part of Yongin-si is mostly alluvial, and is partially distributed around Tancheon Stream and Singalcheon Stream in the northwest.