河 is a Japanese kanji written with 8 strokes, listed here under the keyword “river”. It is built from 可 (can) and 水 (water). In Remembering the Kanji by James W. Heisig it is frame 157.
On KumiJi Glyph Explorer, open the parts search and type “can” + “water”. 河 is among the results, together with every other character containing the same shapes.
Open 河 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.