Statistical Parameters Analysis of Sediment Grain Size From Raya River Bengkayang Regency, West Borneo

Abstract

The study of the statistical analysis parameters of grain size in the waters of Sungai Raya was carried out in order to understand the characteristic of the sediment in the river and coastal areas. The grain size by sieving method, and analyze the statistical parameters including the average grain size, sorting, skewness, and kurtosis. Sediment samples were acquired from six stations with each station consisting of three sampling points representing river west bank, river midstream, river east bank, and the coastal area consisting of five stations. The results of the sediment analyses showed that the average grain size in the river ranges from 1.23 to 2.77 mm, and on the beach area is between 1,52 - 2,59 mm, classified as fine sand, medium sand, very fine sand, and coarse sand with predominant fine sand in all stations. The results of the statistical parameter analysis of the grain size of the bottom sediment in the waters of Sungai Raya exhibit the average diameter value ranging from 1.23 to 2.77 mm, classified as fine sand to medium sand. This value indicates that the type of sediment in this location is dominated by silt with grain sizes ranging from < 0.05 - 0.002 mm. The sorting value ranges from 0.14 to 1.59 mm, categorized into moderately sorted, moderately well-sorted, very well sorted, and poorly sorted classes. The average value of skewness is 2.17 with the classification of the bed load being very fine and kurtosis value ranges from 0.72 to 1.67 indicates the classification in these waters is platycuric, mesokurtic, leptokurtic, and very leptokurtic. These finding concluded that in the study area there is a variation in the angularity of the sediment grains due to the different hydrodynamic processes

LUSI sediment characteristics and its distribution pathway in the porong river

“…When the Porong River has a higher discharge rate, it also has a greater capacity to carry particles generated by the Sidoarjo mud (LUSI) overflow. The distribution of sediment material is affected by a condition that depends on the size of grains and can be influenced by the strength and weakness of river flow [24]. Various material distributions were found from field observations.…”

Studi Karakteristik Sedimen Dasar Perairan Tanjung Pasir Banten menggunakan Metode Gradistat

“…Untuk sedimen kohesif, kecepatan endapnya dipengaruhi oleh banyak faktor seperti konsentrasi sedimen suspensi, salinitas dan diameter dari partikel sedimen dasarnya (Rachman & Wibowo, 2022). Salah satu alternatif dalam mengkaji dan menentukan lingkungan sedimentasi serta arah transpor sedimen maka penentuan parameter statistik seperti besar butir rata-rata (mean grain size), standar deviasi kepencongan (skeweness) dan kurtosis sering digunakan (Affandi et al, 2012;Muhardi et al, 2021). Tujuan dari kajian ini adalah untuk mengetahui pola sebaran karakteristik sedimen dasar laut seperti kadar air, berat jenis, tekstur sedimen, ukuran d50 butir sedimen dan analisis statistik sedimen dasar pada musim barat, karna pada musim ini (musim hujan) pengaruh sedimen dari darat sangat besar.…”

The statistical parameters analysis of bed load grains in Sungai Kakap Waters, Kubu Raya Regency

“…Skewness merupakan suatu nilai yang dapat digunakan untuk mengukur tingkat asimetris dari distribusi data terhadap distribusi normal (Muhardi et al, 2021a). Dari hasil pengolahan data statistik sedimen diperoleh nilai kemencengan yang dapat dilihat pada Tabel 4.…”