ⓘ Geographic classifications ..

River Styles Framework

The River Styles Framework is a scientific tool used to describe and explain the diversity and distribution of river types in a catchment according to river character and behaviour. The River Styles Framework is based on the science of fluvial geomorphology. Each river type is called a "River Style" and its name is constructed following a consistent naming convention. The River Styles Framework provides an open-ended process for interpreting rivers rather than fitting them into pre-existing categories. The River Styles Framework is designed to provide a scientific basis for river managemen ...

Rosgen Stream Classification

The Rosgen Stream Classification is a system for natural rivers in which morphological arrangements of stream characteristics are organized into relatively homogeneous stream types. This is a widely-used method for classifying streams and rivers based on common patterns of channel morphology. The specific objectives of this stream classification system are as follows: 1) predict a rivers behavior from its appearance; 2) develop specific hydrologic and sediment relationships for a given stream type and its state; 3) provide mechanisms to extrapolate site-specific data to stream reaches havi ...

County-class city

A county-level municipality, county-level city or county city, formerly known as prefecture-controlled city, is a county-level administrative division of the Peoples Republic of China. County-level cities have judicial but no legislative rights over their own local law and are usually governed by prefecture-level divisions, but a few are governed directly by province-level divisions. A county-level city is a "city" 市 ; shì and "county" 县 ; xiàn that have been merged into one unified jurisdiction. As such it is simultaneously a city, which is a municipal entity and a county which is an ad ...

Prefecture-level city classification

A prefectural-level municipality, prefectural-level city or prefectural city ; formerly known as province-administrated city from 1949 to 1983, is an administrative division of the Peoples Republic of China, ranking below a province and above a county in Chinas administrative structure. Prefectural level cities form the second level of the administrative structure. Administrative chiefs of prefectural level cities generally have the same rank as a division chief of a national ministry. Since the 1980s, most former prefectures have been renamed into prefectural level cities. A prefectural l ...