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河川地形

8 件の記事

Stone Tree, a mushroom-shaped rock sculpted by the phenomenon of corrasion, in the Bolivian Altiplano.

研磨作用(Corrasion)が作り出す地形のメカニズム

研磨作用Corrasion地形学浸食
Tools to stem the erosion of rivers in the 18th century

水力作用(Hydraulic Action)による地形の変化と浸食メカニズム

水力作用浸食河川地形海岸浸食
A stream bed following a tilted valley. The maximum gradient is along the down-valley axis represented by a hypothetical straight coast channel. Meanders develop, which lengthen the course of the stream, decreasing the gradient.

河川の蛇行(メアンダー)とその形成メカニズム

蛇行メアンダー河川地形三次元流
Aerial picture of the Ebro river as it reaches the Mediterranean Sea by the Ebro Delta

基準面(ベースレベル)が地形形成に与える影響とメカニズム

基準面ベースレベル浸食地貌学
Headward erosion is demonstrated in this 1906 photo taken near Mount Tamalpais in Marin County, California. Groundwater sapping is causing this gully to lengthen up the slope.

頭方浸食のメカニズムと地形への影響

頭方浸食河川地形浸食作用流域
Several stages of downcutting by the San Juan River in Utah can be identified in this 1927 photo. Remnants of former floodplains stand as terraces above the river's modern level.

下方浸食(ダウンカッティング)の仕組みと地形への影響

下方浸食ダウンカッティング河川地形ベースレベル
Dendritic drainage: the Yarlung Tsangpo River, Tibet, seen from space: snow cover has melted in the valley system.

排水系(水系)のパターンと地形学的メカニズム

排水系水系パターン地形学樹枝状水系
refer to caption

扇状地(Alluvial Fan)の形成メカニズムと地理的特性

扇状地堆積地形土石流河川地形