Monitoring of Water Quality and Plankton Composition in Porong Estuary, Sidoarjo Uun Yanuhar, Muhammad Musa, Herly Evanuarini, Nur Sakinah Junirahma and Nico Rahman Caesar
Brawijaya University
Abstract
Disposal of Lapindo mud which carries nutrients and other dissolved organic matter into the Porong estuary, can cause the death of aquatic organisms due to high contamination and disturbance of aquatic ecosystems. The presence of phytoplankton can provide information about the current state of the Porong estuary. The purpose of this study was to report water quality and plankton composition in the Porong estuary. The method used in this study is a survey method with a descriptive approach. Determination of the sampling point using purposive random sampling technique with three stations. The research variables observed included water quality parameters including temperature, Total Dissolved Solids (TDS), Total Suspended Solid (TSS), Total Organic Matter (TOM), pH, Dissolved Oxygen (DO), Carbon dioxide (CO2), Biological Oxygen Demand (BOD), nitrate, ammonia, orthophosphate, salinity, and observations of phytoplankton in the waters. The water quality values at stations 1, 2, and 3 respectively for TSS, pH, DO, BOD, TOM, nitrate, ammonia, orthophosphate shows a less than optimal value. Water conditions based on plankton abundance 24,678 cells/mL, 44,904 cells/mL, 18,312 cells/mL were euthropic. The average of water quality parameters classified as less than optimal. Relatively, station 1 is the station with the best conditions between stations 2 and 3.
Keywords: water quality- plankton- porong- estuary
