濁水溪
Changhua county is located on the west coast of Taiwan, bordering Taichung City on the north separated by Dadu River, so Changhua County and Taichung City are often referred to as the Taichung–Changhua metropolitan area. Changhua County is bordered by Yunlin County to the south by the Zhuoshui River. To the east, Changhua County is separated from Nantou County and southern Taichung City by Bagua Plateau. To the west, Changhua County faces the Taiwan Strait.