Correct

集水

/ jí shuǐ / 
Strokes

Example

As a Verb

collect water

1
Jí
集
shuǐgōu
水沟

collecting drain

As a Noun

water conservancy catchment

2
Jíshuǐōu
集水区

catchment district

3
Jí
集
shuǐ
水
miànjī
面积

catchment area/basin