The big seal script of character Ditch is
The left is character Water - 水 (Post 13), right one is character Fish Trap - 冓 (Post 524). The place with water and multiple fish traps is ditch. The river is not good for fish trap because the flow is too strong and fast.
The small script of character Ditch is
Similar to big seal script.
The clerical script of character Ditch is
Similar to older scripts.
The traditional song typeface for character Ditch is
The pinyin of the character is Gou1.
The simplified song typeface for character Ditch is
The left is Three Drops Radical, meaning is Water. The right one is character Hook - 勾 (Post 526), has nothing to do with character Fish Trap - 冓 (Post 524), the right side of traditional song typeface. Not only their writings are different, but their meanings are totally different. The only same the two have is the pronunciation Gou1. Besides, 勾 is only sometimes as the simplified part of 冓, not consistent. It is big topic, not discuss here.
Anyway, this is a bad simplification.