2 sentences

1. 古人筑坟以防水患。

   gǔ​rén zhù fén yǐ fáng shuǐ​huàn.

   Ancient people built embankments to prevent floods.

   Source: Dong Chinese Dictionary

2. 政府投入大量资金根治黄河水患。

   zhèng​fǔ tóu​rù dà​liàng zī​jīn gēn​zhì Huáng Hé shuǐ​huàn.

   The government has invested a lot of money to bring the Yellow River floods under permanent control.

   Source: Dong Chinese Dictionary