Along-strike variations of morphotectonic features in the Western Foothills of Taiwan: tectonic implications based on stream-gradient and hypsometric analysis

Chen, Yen-Chieh; Sung, Quo-Cheng; Cheng, Kuang-Yu

doi:10.1016/s0169-555x(03)00059-x

Cited by 267 publications

(169 citation statements)

References 39 publications

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“…Graded rivers typically develop a smooth concave profile and, hence, a semilogarithmic plot of those profiles will yield a straight line (Figure 3(b)) (Hack, 1973;Brookfield, 1998;Chen et al, 2003):…”

Section: Rivers In Equilibrium Conditionsmentioning

confidence: 99%

“…This geomorphic index is very sensitive to changes in lithology and/or tectonic uplift. Hence, SL variations have been recognized as a useful reconnaissance tool in tectonically active areas for many years (Hack, 1973;Seeber and Gornitz, 1983;Merritts and Vincent, 1989;Brookfield, 1998;Carvajal and Sanz de Galdeano, 2001;Azor et al, 2002;Chen et al, 2003;Pérez-Peña et al, 2004, Goldrick andBishop, 2007). Most of these studies were based on comparisons of SL profiles along different rivers.…”

Section: Introductionmentioning

confidence: 99%

“…However, the fact that the SL index is strongly influenced by river length makes comparing SL values in rivers of different length difficult. To overcome this problem, some authors have proposed using the graded river gradient (K) as a normalization factor for the SL index (Seeber and Gornitz, 1983;Chen et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Spatial analysis of stream power using GIS: SLk anomaly maps

Pérez-Peña

Azañón

Azor

et al. 2008

Earth Surf Processes Landf

142

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The stream length-gradient index (SL) shows the variation in stream power along river reaches. This index is very sensitive to changes in channel slope, thus allowing the evaluation of recent tectonic activity and/or rock resistance. Nevertheless, the comparison of SL values from rivers of different length is biased due to the manner in which the index is formulated, thus making correlations of SL anomalies along different rivers difficult. Therefore, when undertaking a comparison of SL values of rivers of different lengths, a normalization factor must be used. The graded river gradient (K ) has already been used in some studies to normalize the SL index. In this work, we explore the relationships between the graded river gradient (K), the SL index and the stream power, proposing the use of a re-named SLk index, which enables the comparison of variable-length rivers, as well as the drawing of SLk anomaly maps. We present here a GIS-based procedure to generate SLk maps and to identify SLk anomalies. In order to verify the advantages of this methodology, we compared an SLk map of the NE border of the Granada basin with both simple river profileknickpoint identification and with an SL map. The results show that the SLk map supplies good results with defined anomalies and suitably reflects the main tectonic and lithological features of the study area.

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Section: Rivers In Equilibrium Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial analysis of stream power using GIS: SLk anomaly maps

Pérez-Peña

Azañón

Azor

et al. 2008

Earth Surf Processes Landf

142

View full text Add to dashboard Cite

show abstract

“…We calculated SL at 120-m intervals, yielding 1240 points for the calculation. We also followed the methodology proposed by Chen et al [30] and produced the "Hack profile" and the idealized gradient index (K) [29] for the entire profile of each main stream of the 3rd watershed. K can be deemed as the proxy of stream power and is computed as:…”

Section: Materials and Methodologymentioning

confidence: 99%

Morphometric Analyses of Danxia Landforms in Relation to Bedrock Geology: A Case of Mt. Danxia, Guangdong Province, China

Wen¹

2013

TOGEOJ

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Abstract:The "Danxia landform" is an erosional landform type originally defined in China. It is characterized by redcolored sandstones and steep cliffs, and developed via long-term erosion. Detailed quantitative geomorphometric studies of the characteristics of Danxia landforms in China have not yet been conducted. Using GIS, we conducted DEM-based geomorphometric analyses of 42 watersheds on Mt. Danxia, China. This area has many typical Danxia landforms. Analysis of stream networks indicates that fault systems are responsible for the NE-trending stream direction. Hypsometric curves and hypsometric integrals (HI) of the watersheds show that HI is significantly affected by lithology; the lithological difference between the eastern and western parts of the study area are reflected in the general form of watersheds. Longitudinal profiles of the watersheds were used to analyze the stream length gradient (SL) index and Hack profiles, which were also found to reflect lithology and fault control.

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“…Thus, morphometric parameters have earlier been observed as crucial indices of surface processes within a given basin. Consequently, these parameters have been determined and analyzed in many geomorphological and surface hydrological studies such as sediment deposition, flood parameterization as well as the evolution of basin morphology (Jolly, 1982;Adejuwon et al, 1984;Anyadike and Phil-Eze, 1989;Lifton and Chase, 1992;Moglen and Bras, 1995;Chen et al, 2003;Haung and Niemann, 2006). More recently, morphometric analyses have been playing a major role in modeling of surface processes such as soil erosion and flooding (Nogami, 1995;Singh et al, 2008;Ajibade et al, 2010;Sumira et al, 2013).…”

Section: Introductionmentioning

confidence: 99%