paddy ridge, levee
畔 centers on the boundary or edge of a rice paddy, specifically the raised ridge or levee that separates fields. It can also refer to the bank or shore of a body of water.
畔 combines 田 (rice field) and 半, which likely contributes the sound and may suggest a dividing line, giving the idea of a ridge that splits fields.
The left side 田 is a rice field, and the right side 半 looks like a dividing line. Picture a raised path cutting the field in half: that ridge is the paddy levee.
For ハン, imagine a hand (ハン) building the ridge between the fields: hand -> ハン, shaping the levee.
lakeside; lakeshore; lakefront
riverside
approach to a bridge
near the pond; edge of a pond
shore; waterside
Crepidiastrum keiskeanum (species of plant in the daisy family)
common false pimpernel (Lindernia procumbens); prostrate false pimpernel
ridge between rice fields