2 sentences

1. 把这条河闸住，引水灌溉农田。

   bǎ zhè tiáo hé zhá zhù, yǐn​shuǐ guàn​gài nóng​tián.

   Dam up the river to divert water for field irrigation.

   Source: Dong Chinese Dictionary

2. 田边有一条渠，引水灌溉十分方便。

   tián biān yǒu yī tiáo qú, yǐn​shuǐ guàn​gài shí​fēn fāng​biàn.

   There is a ditch by the field, making irrigation very convenient.

   Source: Dong Chinese Dictionary