answers:
Water forms
Touqian River - Tainan City - 28 km (17 mi)
Jishui River - Tainan City - 65 km (40 mi)
Guichong River - Tainan City - 35 km (22 mi)
Baishui River (白水溪) - Tainan City - 20 km (12 mi)
Zengwen River - Chiayi County, Tainan City, Tainan City - 130 km (81 mi)
Houku River – Nantou County, Tainan City - 51.4 km (31.9 mi)
Yanshui River - Tainan City - 41 km (25 mi)
Erren River - Tainan City, Kaohsiung City - 65 km (40 mi)
Agongdian River - Kaohsiung City - 38 km (24 mi)
Fengshan River - Kaohsiung City - 20 km (12 mi)
Dianbao River - Kaohsiung City - 32 km (20 mi)
Gaoping River - Kaohsiung City, Pingtung County - 171 km (106 mi)
Qishan River - Kaohsiung City, Pingtung County - 117 km (73 mi)
Ailiao River - Kaohsiung City, Pingtung County - 69 km (43 mi)
Wuluo River - Pingtung County
Laonong River - Kaohsiung City - 136 km (85 mi)
Zhuokou River - Kaohsiung City - 50 km (31 mi)
Donggang River - Pingtung County - 47 km (29 mi)
Linbian River - Pingtung County - 42 km (26 mi)
Beinan River - Taitung County - 84 km (52 mi)
Xiuguluan River - Hualien County - 81 km (50 mi)
Fuyuan River - Hualien County - 28 km (17 mi)
Fengping River - Hualien County - 37 km (23 mi)
Lekuleku River - Hualien County - 54 km (34 mi)
Hualien River - Hualien County - 57 km (35 mi)
Mukua River - Hualien County - 42 km (26 mi)
Shoufeng River - Hualien County - 37 km (23 mi)
Wanli River - Hualien County - 53 km (33 mi)
Landform
Land formations lower than 100 meters are plains: these include great plains, deltas and valleys. Those surrounded by hills with a flat base in the center are basins, though some basins rise above 100 meters. The major ones in Taiwan are Taipei basin, Taichung basin, and Puli basin.