The Triangular Diagram Used for Classification of Estuarine Sediments: A New Approach

Pejrup, Morten

doi:10.1007/978-94-015-7762-5_21

Cited by 114 publications

(95 citation statements)

References 3 publications

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“…Considering B (shallow lagoon beds ) sediments, samples with sand contents of up to 30% correspond to locations in the southern part of the Lagoon and those near the three sea inlets. Taking into account the hydrodynamic models of Pejrup (1988) and Flemming (2000), the location of data within the ternary diagram reflects specific hydrodynamic energy conditions. With respect to the relative proportions of silt and clay, the closer a set is located to the silt end-member, the higher is the energy level.…”

Section: Sediment Classificationmentioning

confidence: 99%

Links between hydrology and sedimentology in the Lagoon of Venice, Italy

Molinaroli

Guerzoni

Sarretta

et al. 2007

Journal of Marine Systems

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A textural classification of sediments collected in input channels, shallow lagoon beds and navigation channels of the Lagoon of Venice is presented. Some variables describing both the hydrodynamics and the transport time scales of the Lagoon are compared with bottom sediment distribution inside the basin. A high correlation between residence time (REST) and the silt fraction (4-31 µm) was only found for REST values < 20 days. A good correlation was also found between root mean square velocity (RMSV) and the fine sand fraction (63-105 µm) for RSMV > 10 cms -1 . The distribution of the various sediment types was explained by the use of PCA applied to both grain-size and hydrological parameters, which extracted two principal factors and formed four groups of clustered samples. Groups 1 (clayey silt) and 2 (very silty slightly sandy mud) comprise samples located mainly in the northern and central lagoon and inshore. The samples of group 3 (very silty sandy mud) seem to show stabilisation, reflected in the reduction of sand and the sedimentation of silt with respect to samples in group 4 (slightly silty sand), some of which were collected on a previous seagrass bed which has now disappeared and/or been reduced in size.

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Section: Sediment Classificationmentioning

confidence: 99%

Links between hydrology and sedimentology in the Lagoon of Venice, Italy

Molinaroli

Guerzoni

Sarretta

et al. 2007

Journal of Marine Systems

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“…Detailed information relating to the particle size characterization with Shepard (1954) and Pejrup (1988) diagrams and the mineralogical composition of the clay fraction can be found in Oliveira et al (in press). …”

Section: Resultsmentioning

confidence: 99%

Distribution and isotopic composition of lead in bottom sediments from the hydrographic system of Belém, Pará (western margin of Guajará Bay and Carnapijó River)

et al. 2016

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This study first aimed to evaluate the effect of human activities on the distribution of lead within the estuarine system of Belém, Pará. This was achieved by studying the concentration and isotopic signature of Pb in bottom sediments from the western margin of Guajará Bay and from Carnapijó River, an area removed from the influence of the city of Belém. Secondly, the contribution of suspended matter in the transportation of anthropogenic Pb in Guajará Bay was evaluated. Third, the content and background isotopic signature of Pb in the hydrographic system of Belém was determined. Isotopic signatures of sediments from the western margin of Guajará Bay confirm an anthropogenic contribution of Pb throughout the entire bay. The Pb accumulation process has become more efficient over the last 10 years, and this can be attributed to the rapid population growth of Belém city. Sediments in Carnapijó River are not affected by human activities, and the average concentration values (Pb = 19.6 ± 3.7 mg kg -1 ) and isotopic signatures ( 206 Pb/ 207 Pb = 1.196 ± 0.004) confirm the background Pb values previously proposed for the river system in the Belém region. The isotopic signatures of suspended matter on the eastern ( 206 Pb/ 207 Pb = 1.188) and western ( 206 Pb/ 207 Pb = 1.174) margins of Guajará Bay show that suspended matter is an efficient Pb transportation mechanism of domestic and industrial wastewater from Belém to the western margin of the Bay due to tidal effects at the confluence with Guamá River.

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“…Several other authors have proposed alternative triangular diagrams, e.g., Reineck and Siefert (1980), Pejrup (1988) and Flemming (2000), which emphasise sand, silt and clay ratios. Pejrup (1988) modified Folk's TD (Fig.…”

Section: Grain-size Analysis and Ternary Classificationsmentioning

confidence: 99%

“…Pejrup (1988) modified Folk's TD (Fig. 1b) on the basis of hydrodynamic considerations, improving the classification from a genetic viewpoint.…”

Section: Grain-size Analysis and Ternary Classificationsmentioning

confidence: 99%

“…Starting from the considerations of Reineck and Siefert (1980) and Pejrup (1988), Flemming (2000) suggested a new grain-size classification for gravel-free muddy sediments, permitting applications at various levels of complexity depending on requirements and available textural information. Using the same basic terminology, Flemming (2000) identified the advantage of this scheme in improved spatial resolution of textural provinces.…”

Section: Grain-size Analysis and Ternary Classificationsmentioning

confidence: 99%

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Development of algebra algorithms for automated generation of grain‐size distribution maps

Sarretta

Masiol

Molinaroli

2007

Earth Surf Processes Landf

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The grain-size distribution of sediments is a fundamental characteristic in understanding the earth's surface environments and an essential tool in classifying sedimentary environments. Grain-size data provide important information on the energy and dynamics of depositional environments and aid our understanding of sediment transport. Ternary diagrams (TD) are useful and conventional tools to classify sediments on the basis of relative grain-size (i.e., gravel, sand, mud or sand, silt, clay).The development of spatial modelling in a Geographical Information System (GIS) can assist in treating, computing and displaying sedimentological data, such as grain-sizes.

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The Triangular Diagram Used for Classification of Estuarine Sediments: A New Approach

Cited by 114 publications

References 3 publications

Links between hydrology and sedimentology in the Lagoon of Venice, Italy

Links between hydrology and sedimentology in the Lagoon of Venice, Italy

Distribution and isotopic composition of lead in bottom sediments from the hydrographic system of Belém, Pará (western margin of Guajará Bay and Carnapijó River)

Development of algebra algorithms for automated generation of grain‐size distribution maps

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