knickpoint

[′nik ‚pȯint]

(geology)

A point of sharp change of slope, especially in the longitudinal profile of a stream or of its valley. Also known as break; knick; nick; nickpoint; rejuvenation head; rock step.

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References in periodicals archive ?

The Sapucai-Mirim River is located in the high Parana Basin and it is a 5th order river, approximately 290 km in length, characterized by an alternating longitudinal profile between fast flow stretches and sequences of small knickpoints.

Potential impact of small hydroelectric power plants on river biota: a case study on macroinvertebrates associated to basaltic knickzones/Potencial impacto de pequenas centrais hidreleticas sobre a biota aquatica: um estudo de caso sobre macroinvertebrados associados a pedrais basalticos

Knickpoint finder: tool for searching geosites of relevant interest for geotourism.

Geodiversity's quantification and analysis applied to geotourism in the Southern Environmental Protection Area of the Metropolitan Region of Belo Horizonte, Minas Gerais/Quantificacao e analise da geodiversidade aplicada ao geoturismo na area de Protecao Ambiental Sul da Regiao Metropolitana de Belo Horizonte, Minas Gerais

Today, only the lowermost reach of the Ebro river is near sea level and close to a equilibrium longitudinal profile, indicating a long period of time with a non-equilibrium longitudinal profile and slow erosion through the Catalan Coastal Ranges that formed a marked knickpoint in the river for a long period.

Some considerations on the initiation of the present SE Ebro river drainage system: Post- or pre-Messinian?/Algunas reflexiones sobre el inicio del sistema de drenaje actual del SE del rio Ebro: Post- o pre-Messiniense?

Outro dado que pode trazer indicativos de unidades geomorfologicas para mapeamentos em escalas de detalhe refere-se aos pontos de ruptura da declividade (knickpoints).

GEOMORPHOLOGICAL ANALYSIS APPLIED TO STUDIES OF TERRESTRIAL TRANSPORT ROUTES IN BRAZIL/ ANALISE GEOMORFOLOGICA APLICADA AOS ESTUDOS DE VIAS DE TRANSPORTE TERRESTRE NO BRASIL

On the other hand, base level map shows erosive tendency indicating three-dimensional longitudinal section of valleys, being useful to study knickpoints. In the oceanic regions, it expresses basement height of seamounts, with similar effect of the Wiener low-pass filter (SMITH; SANDWELL, 1994).

Principle and geomorphological applicability of summit level and base level technique using Aster Gdem satellite-derived data and the original software Baz/Principio e aplicabilidade das tecnicas de seppomen e sekkokumen para analises geomorfologicas com base nos dados de satelites do Aster Gdem e o software original Baz

Foi necessario caracterizar o perfil longitudinal do rio, importante para definir os pontos de quebra do gradiente do canal (knickpoints), metodo util para identificar os trechos de transicao entre o alto; medio e baixo rio Cauame.

Vulnerability to environmental impacts of river basin as a result of Cauame urban expansion and recreation for use at its beaches/Vulnerabilidade aos impactos ambientais da bacia hidrografica do rio Cauame em decorrencia da expansao urbana e uso para lazer em suas praias

The knick zone which is represented by knickpoints migrates upstream as the channel responds to the uplift-rate change.

DEM BASED GEOMORPHIC ANALYSIS ALONG KALABAGH FAULT AND POTWAR PLATEAU TO CONSTRAIN SURFACE DEFORMATION: INFERENCES FROM REMOTE SENSING AND GIS

According to these observations, longitudinal stream profiles in the southern slope locally show concave-convex profiles with knickpoints and high SLk anomalies 4, 5 and 6 occur (Fig.

Active tectonics in the central and eastern Betic Cordillera through morphotectonic analysis: the case of Sierra Nevada and Sierra Alhamilla/Tectonica activa en la Cordillera Betica Oriental y Central mediante analisis morfotectonico: el caso de Sierra Nevada y Sierra Alhamilla

Rivers probably had a convex longitudinal profile with a low stream gradient on the upper end and knickpoints at the klint.

Ancient buried valleys in the city of Tallinn and adjacent area/Mattunud orud Tallinnas