Physical Properties of Sedimen in Ciliwung River as Proxy Indicator of Anthropogenic Activities Kartika Hajar Kirana (a,b*), Sonia Fitria Lengga Kencana (a), Dini Fitriani (a), Eleonora Agustine (a)
a) Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran
Jalan Raya Bandung-Sumedang Km. 21 Jatinangor 45363, Indonesia
*kartika[at]geophys.unpad.ac.id
b) Citarum Research Center, Universitas Padjadjaran
Jalan Dipatiukur 35 Bandung 40132, Indonesia
Abstract
The Ciliwung River in the middle zone of segment III is one of the river areas in West Java that is experiencing a decline in environmental quality. Intensive human activities have implications for pollutant input in the form of anthropogenic materials that could affect the condition of the Ciliwung River. This research was conducted to identify the condition of the Ciliwung River regarding the influence of anthropogenic materials on river sediments, particularly through the abundance of magnetic minerals via the identification of physical properties in the sediment. Measurement of physical properties was carried out using susceptibility, EC, TDS, and hysteresis parameters, along with chemical parameters such as pH in river sediments. The results revealed that the susceptibility value ranged from 893.31x10-8 to 3.712.11x10-8 m3/kg, with susceptibility frequency dependent less than 4 per cent, indicating multidomain grains and hysteresis parameter results containing magnetite, which suggested a contribution from anthropogenic materials. Meanwhile, the results of EC, TDS, and pH measurements in both sediment and hydrology remain within the standards established based on their function.
Keywords: river sediment, magnetic susceptibility, anthropogenic
