Soil and water Conservation Act Article 25

The competent authority may, for the purposes of soil and water conservation treatment and maintenance, appropriate the necessary public land or condemn the necessary private land. Where it is necessary to condemn land for emergency treatment, the competent authority may, subject to the approval of the Executive Yuan, first use the land.
中文原文 水土保持法第25條
為辦理水土保持之處理與維護需用公有土地時,主管機關得辦理撥用;土地權屬私有者,主管機關得依法徵收之。
遇因緊急處理需徵收土地時,得報經行政院核准先行使用土地。

English translation for reference only; the Chinese text prevails. Not legal advice.