Marshy Rice Field
Numata
noun
A bog rice paddy is a marshy rice field. This is just a rice paddy in marshy form.
In modern language, 沼田 is mostly used as a place name or surname, such as Numata City in Gunma Prefecture or someone with the last name Numata.
The reading is the same as what you learned with the kanji.
沼田を裸足で歩いたことはありますか。
Have you ever walked barefoot through a marshy rice paddy?