DETERMINANT PARAMETERS FOR UPSTREAM ECOLOGICAL STATUS ASSESSMENT OF CITARUM RIVER, INDONESIA

Abstract

This study was aimed to identify physicochemical and biological determinant parameters inassessing the ecological status of the upstream area of CitarumRiver during the dry and rainy season. Thisstudy consisted of two steps: 1) Principle Component Analysis to classify environmental parameters andselect the determinant environmental parameters significantly affecting the status, and 2) matrixarrangements using the selected determinant parameters for ecological status assessment. The PCA resultsshowed that during the dry season, genera macrozoobenthic and physicochemical parameters grouped theslightly-quite-moderately polluted status. In the rainy season, macrozoobenthic and physicochemicalparameter grouped the quite-moderately polluted status. Based on the selected determinant parameters, itcould be stated that 1) Leuctra sp., Perlesta sp, and total sediment nitrogen determine the slightlypolluted status, 2) Baetis sp., Sulcospira sp., conductivity, and NO3-determine the quite polluted status, 3)Lumbriculus sp., Chironomus sp., NO2, silt, and BOD determine the moderately polluted status. While thedeterminants during the rainy season in quite and moderately polluted location were: 1) Hydropsyche sp.,Rhyacophila sp. and gravel in the quite polluted status, 2) Placobdella sp., Tubifex sp., TSS and NH3 in thepolluted status. The assessment matrix arranged using determinant parameters were able to determine theecological status of the Citarum upstream in the rainy (quite-moderately polluted) and the dry season(slightly-quite-moderately polluted).