Ninnescah River
The Ninnescah River is a river in the central Great Plains of North America. Its entire length lies within the U.S. state of Kansas. It is a tributary of the Arkansas River. Geography. The Ninnescah River originates in the Wellington Lowlands of south-central Kansas. It is formed in southwestern Sedgwick County by the confluence of the North Fork Ninnescah River and the South Fork Ninnescah River. From there, it flows southeast into the Arkansas River Lowlands. It empties into the Arkansas River roughly north of Oxford, Kansas in eastern Sumner County.