river in Shaanxi province
灃 is a specific proper noun referring to a river in Shaanxi province. It has no broader abstract meaning beyond this geographical name.
灃 combines the water radical 氵 with 豐, which likely contributes the sound. The character was created to name a specific river.
The water radical 氵 on the left signals a body of water, and the right side 豐 suggests abundance. Picture a plentiful, flowing river in Shaanxi.
For フウ, imagine the sound of the wind (風, ふう) blowing across the river: 風 -> フウ, and the river's name echoes that sound.
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