扇状地

• Reading: せんじょうち
• Romaji: senjouchi
• Kanji breakdown: 扇 (sen/ogi) — fan; 状 (jo) — shape, form; 地 (chi/ji) — ground, land
• Pronunciation: /seɴ.dʑoː.tɕi/

Meaning

Alluvial fan; fan-shaped plain. A fan-shaped deposit of sediment formed where a fast-flowing stream loses velocity upon entering a flatland at the base of a mountain.

A geographical and geological noun. 扇状地 forms when a mountain stream suddenly decelerates upon reaching a plain, depositing coarse gravel and sand in a characteristic fan shape. The well-drained, gravelly soil of alluvial fans is prized for fruit cultivation in Japan, as seen in the orchards of Yamanashi Prefecture. The term appears in textbooks, geographic surveys, and agricultural discussions.

Examples

1. 扇状地は水はけのよい土壌が特徴で、果樹栽培に非常に適している。 Alluvial fans are characterised by well-drained soil and are extremely well-suited to fruit cultivation.
2. 川が山地を出て平野に達する地点には扇状地が形成されることが多い。 Where a river exits the mountains and reaches a plain, an alluvial fan is often formed.
3. 上空から見ると、その扇状地は名のとおり扇を広げたような形をしている。 When viewed from the air, the alluvial fan has a shape that, true to its name, resembles an open fan.

Usage Guide

Context: geography, geology, agriculture, education

Tone: academic

Origin & History

Compound of 扇状 (fan-shaped) and 地 (ground, land). The term is a direct description of the shape: 扇 (folding fan) + 状 (shape, form) + 地 (land).

Cultural Context

Era: Modern

Generation: Adults

Social background: Academic