Textural characteristics of foreshore sediments along Karnataka shoreline, west coast of India

Dora, G. Udhaba; Kumar, V. Sanil; Philip, C. Sajiv; Glejin, Johnson; Vinayaraj, Poliyapram; Gowthaman, R.

doi:10.1016/s1001-6279(11)60100-5

Cited by 36 publications

(10 citation statements)

References 15 publications

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“…The first unit (TS1), at site 013 between ~ 8 and 16 cm, is more evident given that it shows an increase in the average grain size (medium sands), is very poorly classified, and with a very leptokurtic curve; at the base of 013, only the upper part of unit two (TS2), between ~ 26 and 30 cm, is marked by an increase in the average grain size (medium sands), very poorly classified and with an extremely leptokurtic curve. Although kurtosis values tend to be extreme, in both cases they could be related to a highly energetic environment as the one responsible for this condition 33,34 . A line of characteristics suggests tsunamigenic origin of these sandy layers (Fig.…”

Section: Resultsmentioning

confidence: 98%

Sand deposits reveal great earthquakes and tsunamis at Mexican Pacific Coast

Ramírez‐Herrera

Corona

Cerny

et al. 2020

Sci Rep

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Globally, instrumentally based assessments of tsunamigenic potential of subduction zones have underestimated the magnitude and frequency of great events because of their short time record. Historical and sediment records of large earthquakes and tsunamis have expanded the temporal data and estimated size of these events. instrumental records suggests that the Mexican Subduction earthquakes produce relatively small tsunamis, however historical records and now geologic evidence suggest that great earthquakes and tsunamis have whipped the Pacific coast of Mexico in the past. the sediment marks of centuries old-tsunamis validate historical records and indicate that large tsunamigenic earthquakes have shaken the Guerrero-oaxaca region in southern Mexico and had an impact on a bigger stretch of the coast than previously suspected. We present the first geologic evidence of great tsunamis near the trench of a subduction zone previously underestimated as potential source for great earthquakes and tsunamis. Two sandy tsunami deposits extend over 1.5 km inland of the coast. The youngest tsunami deposit is associated with the 1787 great earthquake, M 8.6, producing a giant tsunami that poured over the coast flooding 500 km alongshore the Mexican Pacific coast and up to 6 km inland. The oldest event from a less historically documented event occurred in 1537. The 1787 earthquake, and tsunami and a probable predecessor in 1537, suggest a plausible recurrence interval of 250 years. We prove that the common believe that great tsunamis do not occur on the Mexican Pacific coast cannot be sustained. Worldwide, instrumentally based assessments of tsunamigenic potential of subduction zones have underestimated the magnitude and frequency of great events 1-3 , to some extent because great earthquakes and tsunamis are infrequent 1-5 and instrumental seismic data are relatively short. Historical and sediment records of large earthquakes and tsunamis have expanded the temporal data and estimated size of these events but mainly where direct observations of great tsunamis have been possible 1,3,4,6. This means that little is still known of great earthquakes and tsunami generation potential of other subduction zones 7-11. Additionally, at the centre of the problem is still the question as to whether subduction zones, despite their relatively short instrumentally seismic history, could generate great earthquakes and tsunamis. We reveal the first geologic evidence, and validate historical records, of great tsunamis and earthquakes near the trench of the Mexican subduction zone previously underestimated as potential source for great earthquakes and tsunamis. Here, we focus on the Corralero coastal plain, in southwestern Mexico, where a great earthquake, M 8.6, triggered a giant tsunami that poured over the coast of Oaxaca, Guerrero, and Chiapas, flooding 500 km along open

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Section: Resultsmentioning

confidence: 98%

Sand deposits reveal great earthquakes and tsunamis at Mexican Pacific Coast

Ramírez‐Herrera

Corona

Cerny

et al. 2020

Sci Rep

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“…The study area's skewness value showed the sediment beach varied between very fine skewed to very coarse skewed (Table 1). Usually, a coast with deposition of sand whereas characterized by positive skewness, while negative skewness is the identity of erosion and non-deposition of the beach (Duane, 1964;Dora et al, 2011;Dora et al, 2014). The very coarse skewed categories were found in nine stations from all stations, indicating uniform grains and sandy sediment types are predominant as wave reworking removes finer sediment and carries it offshore.…”

Section: Resultsmentioning

confidence: 99%

An Assessment of Cilacap Coast's Total Carbonate Sediment Content

et al. 2020

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Sediments are particles derived from the dismantling of rocks from the land and pieces of shell and remains of marine organisms that contain organic matter, included carbonate sediment. The total carbonate sediment content was influenced by many factors, such as sediment grain type. This study aimed to determine the carbonate content in sediments and to determine their relationship to the sediment grain characteristic on the Cilacap coast. The sediment's carbonate content used the titration method, while the sediment grain test used a dry filter. Statistical analysis was used to determine the sediment grain characteristic (mean, sorting, skewness, and kurtosis). The results showed that sediments' total carbonate content had a range of 1.93% - 6.23%, with an average of 4.21%. Sediments are dominated by fine sand with very well sorted, very platykurtic, and very fine skewed characteristics. The relationship between sediment grain characteristics and total sediment carbonate content showed a good correlation due to the sorting factor. Other parameters such as mean size and skewness have been shown a low correlation, whereas kurtosis has a shallow relationship with carbonate content.

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“…The sediment measurement involves the sediment movements to indicate erosion or accretion in the area. It can be used to determined seasonal textural behavior along coastlines [18]. Meanwhile, beach profile measurement is very important to gain the information of erosion and sand deposition.…”

Section: Methodologiesmentioning

confidence: 99%

Erosion Caused by Coastal Structure

2019

ijeat

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Coastal structure such as jetties, groins, sea walls, breakwaters, etc. along the coast can alter the shoreline and morphological structure of coastline. Presence of the coastal structure gives impact like sediment trapping on upstream side of the structure and causing shore erosion along adjacent shorelines. Therefore, this paper presents attempts to describe the coastal erosion process effected by a different kind of coastal structure. Generally, it takes time to notes the impact of coastal erosion, therefore several methods are adapted to identify the erosion by surface sediment sampling and beach profile measurement. These measurements are conducted by conventional and high-technology method such as manual surface sediment sampling, Real-Time Kinematic (RTK) GPS, LiDAR and UAV. In terms of analysis, these methods can be approach with variable techniques and applications. However, this review paper briefly described the commonly used technique and application in finding the result of eroded coastal.

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Textural characteristics of foreshore sediments along Karnataka shoreline, west coast of India

Cited by 36 publications

References 15 publications

Sand deposits reveal great earthquakes and tsunamis at Mexican Pacific Coast

Sand deposits reveal great earthquakes and tsunamis at Mexican Pacific Coast

An Assessment of Cilacap Coast's Total Carbonate Sediment Content

Erosion Caused by Coastal Structure

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