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

Abstract

This study was aimed to identify physicochemical and biological determinant parameters in
assessing the ecological status of the upstream area of CitarumRiver during the dry and rainy season. This
study consisted of two steps: 1) Principle Component Analysis to classify environmental parameters and
select the determinant environmental parameters significantly affecting the status, and 2) matrix
arrangements using the selected determinant parameters for ecological status assessment. The PCA results
showed that during the dry season, genera macrozoobenthic and physicochemical parameters grouped the
slightly-quite-moderately polluted status. In the rainy season, macrozoobenthic and physicochemical
parameter grouped the quite-moderately polluted status. Based on the selected determinant parameters, it
could be stated that 1) Leuctra sp., Perlesta sp, and total sediment nitrogen determine the slightly
polluted status, 2) Baetis sp., Sulcospira sp., conductivity, and NO3
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determine the quite polluted status, 3)
Lumbriculus sp., Chironomus sp., NO2, silt, and BOD determine the moderately polluted status. While the
determinants 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 the
polluted status. The assessment matrix arranged using determinant parameters were able to determine the
ecological status of the Citarum upstream in the rainy (quite-moderately polluted) and the dry season
(slightly-quite-moderately polluted).