The Pingtung Plain is an example. For thousands of years every branch of the Kaoping River, as well as the Linpien River, had its source in the Yushan and Central mountain ranges. From there gravel and mud washed downriver and piled up along the way, turning what had once been a large valley into a plain of more than 1,000 square kilometers.
以屏東平原為例，千萬年來，高屏溪各支流和林邊溪等河流從玉山山脈、中央山脈夾帶礫石、泥沙，一路堆積，將原為一片汪洋的谷地填成一千多平方公里的平原。