lake type
Technical term in limnology; classifies lakes by nutrient level or biological productivity, e.g., eutrophic, dystrophic, oligotrophic.
この地域の湖沼型は主に富栄養型です。
The lake type in this region is mainly eutrophic.
Compound of 湖沼 (こしょう, 'lakes and marshes') + 型 (がた, 'type').