翻訳と辞書 |
Bradshaw model : ウィキペディア英語版 | Bradshaw model
The Bradshaw Model is a geographical model which describes how a river's characteristics vary between the ''upper course'' and ''lower course'' of a river. It shows that discharge, occupied channel width, channel depth and average load quantity increase downstream. 〔http://www.geography-fieldwork.org/rivers/river-variables.aspx〕 Load particle size, channel bed roughness and gradient are all characteristics that decrease. This is represented by triangles; an increase in the size of a triangle represents an increase in the variable. Generally it shows the characteristics we expect to see in a river, but due to the nature of rivers and the ever changing environment in which we live not all rivers fit the model perfectly; therefore the model is usually used in order to compare natural rivers to concepts laid down by the model. 〔earthstudies.co.uk〕 ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Bradshaw model」の詳細全文を読む
スポンサード リンク
翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|