Correct

开河

/ kāihé /
Strokes

Definition

to open a river/to dig a canal/to thaw (of river)

Example

As a Verb

(of a frozen river) thaw

1
Zhè
tiáo
yuèfèn
月份
gāng
kāi
开河
  
,
èr
yuèfèn
月份
yòu
dòng
shàng
le
  

The river thawed in January, then froze solid again in February.

As a Verb

construct/dig a canal