valley

谷、渓谷

丘や山の間に細長く続く低い土地。川が流れていることが多い。

やさしい英語で： A long, low area of land between hills or mountains, often with a river.

• A river runs through the valley.
• We walked down into a green valley.
• Small villages lie in the valleys between the mountains.

類義語： vale

よく使う表現： deep valley, river valley, narrow valley

流域

雨水などが同じ川に流れ込む土地の範囲。

やさしい英語で： An area of land from which water flows into the same river.

• Rainfall across the valley feeds the river.
• The valley includes all the land drained by this river.
• Flood planning covers the whole valley, including its smaller rivers.

類義語： river basin, catchment

よく使う表現： river valley, valley drainage

屋根の谷、谷樋

構造物の低く狭い部分。特に屋根の二つの斜面が合わさる所。

やさしい英語で： A low, narrow part of a structure, especially where two sloping roof surfaces meet.

• Rainwater runs down the roof valley.
• The builder repaired the valley between the two roof sections.
• Leaves had blocked both valleys on the roof.

よく使う表現： roof valley, valley gutter