Spatial Variation of Textural Parameters in a Small River: An Example from Khurar River, Khajuraho, Chhaterpur District, Madhya Pradesh, India (original) (raw)
2014, Global Journal of Earth Science and Engineering
Texture (grain size) is one of the many parameters, which is used in determining depositional environments of sediments and sedimentary rocks. In the present investigation, texture was analysed from sixteen stations in the Khurar River, Madhya Pradesh, India. Here, grain size analysis was carried out employing mechanical sieving method using a sonic shaker. Frequency and cumulative frequency curves were prepared from the grain size data on centimetre and arithmetic probability papers, respectively. The phi values were determined and used to calculate the statistical parameters such as mean, standard deviation, skewness and kurtosis. It is found that the mean size value varies from-0.63to 0.80 with a graphic mean distribution ranging from-0.27 to 0.40 , indicating that the size of the river sand is very coarse to coarse-grained. The standard deviation (sorting) shows a range of 0 .69 to 1.65. The skewness values of the sediment samples range from 0.19 to 0.29 , thus, indicating the presence of fine fraction to near-symmetrical fraction in the population. The kurtosis varies between 1.03 and 1.09 , indicating that 25% of the samples are leptokurtic, 6.25% are very leptokurtic, 50% are mesokurtic and 12.5% are platykurtic. The platykurtic nature in few cases suggests mixing of sediments from two sources. Bivariate plots prepared combining various textural parameters were used to interpret their behaviour in the river sediments. CM plot was also prepared to understand the dominant mode of sediments transportation in the Khurar River. In this river, all the sediments are dominantly characterized by the rolling process of transportation. This study reveals that sorting varies from poorly sorted to moderately well sorted in the course of the river may be because of dominance of winnowing and selective sorting in the lower reaches of the river.
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2016
Abstract The studies on textural characteristics are valuable information to understand the source of evolution for sediments under river environment. In the present investigation surface samples were collected from Arasalar river and subjected to textural analysis. The phi values were determined and used to calculate the statistical parameters such as mean (Mz), standard deviation (σI), skewness (Ski) and Kurtosis (KG). It is found that the mean value varies from (0.667Ø to 2.367Ø), indicating that the size of the river sand is medium to fine grained nature. The standard deviation (sorting) indicates moderately well sorted to moderately sorted with a range of 0.478Ø to 1.042Ø, while the skewness values of the sediment samples ranges from -0.581Ø to 0.389Ø. The Kurtosis varies between 0.679Ø to 1.437Ø, indicating mesokurtic to leptokurtic nature. Linear discriminant values indicate that the sediments were mostly deposited as Aeolian process under turbidity environment. C-M plot inferred that Arasalar river sediments are dominantly characterized by rolling of transportation. Keywords: Arasalar River, Surface sediments, Grain size, Linear discriminate function (LDF) and CM pattern
The present study was carried out in order to study the textural characteristics of sediments. The graphic mean distribution for these sediments ranging from 0.50 to 2.57 ϕ, indicative of fine to coarse grained sand. The standard deviation (sorting) shows a spread of 0.46 to 1.02 ϕ and a mean value of 0.70. Most of the samples are moderate to moderately well sorted with only a few being poorly sorted. The skewness values of the samples ranged from -0.11 to 0. 61, thus indicating the presence of symmetrical to very fine skewed and coarse fraction in the particle population. The kurtosis is between 0.58 and 1.63, Thus indicates kurtosis of the river estuary sediments are platykurtic to leptokurtic in nature (0.62 to 1.63 ϕ). The sample location 2, 4 and 7 bottom cores show very platykurtic with medium to coarse sand, moderately to poorly sorted nature. The kurtosis of the midstream sediments are platykurtic to mesokurtic in nature (0.59 to 1.37 ϕ). Based on the CM pattern the river estuary sediment falls in bottom suspension and rolling while midstream sediments show bottom suspension and rolling whereas channel bar sediments show depositions by rolling mechanism.
Granulometric Analyses of Stream Sediments from Kolar River Sub-Basin, Central India
Journal of Geoscience Research, 2024
This paper focuses on a granulometric study conducted to investigate the sedimentary characteristics of channel sediments in the upper, middle, and lower reaches of the Kolar River Sub-basin. The study's primary objective is to gain a detailed understanding of sediment transport by seamlessly integrating field surveys and laboratory analyses. The study investigates grain size distribution and the deposition environment in the Kolar River Sub-basin. From sediment data,statistical measures were prepared and utilized to construct bivariate diagrams and examine the interrelationship of various parameters. The results indicate that the upper reach exhibits poor sediment sorting, while the middle and lower reaches show more moderate sorting. Skewness values indicate dominance of coarser sediments in the upper reach, finer grain sizes in the middle reach, and a mixed distribution in the lower reach. Kurtosis values suggest concentrated distributions in specific areas of the upper and middle reaches, while the lower reach displays a broader distribution. The CM plot analysis reveals distinct sediment transport types in each reach, reflecting the energy level of water transport and sediment load. This study provides valuable insights into spatial variations in sediment dynamics, contributing to a comprehensive understanding of the overall sedimentary regime of the river. With this understanding, effective river basin management techniques, such as vegetative stabilization, check dam construction and prevention of excessive deposition can be implemented to ensure the sustainable management of the Kolar River Sub-basin.
A Study on Sediments Depositional Mechanism at
2016
— Textural analysis carried out for the sediments of the Nayakkankuppam coast revealed that inlet part is dominated by fine sand, central part is dominated by medium sand and outlet part is dominated by coarse sand. The grain size parameters namely Mean size (MZ), standard deviation (σ1), skewness(Ski), and kurtosis (KG) of percentile values derived from the cumulative curves following Folk and Ward and the moment technique based upon grouped data are most widely used. It is observed that in Nayakkankuppam, most of the samples were fallen in the moderately well sorted to well sorted nature. Skewness measures asymmetry of frequency distribution and marks the position of mean with respect to median. The fine skewed nature of the sediments clearly exhibits sediment input from various sources of tributaries. The finely skewed nature is also implies a low velocity than normal, this skewness data indicated that the sediments are nearly symmetrical to fine skewed, the median class of the s...
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