Indonesia Conference Directory

In the waters of the Tallo River there is an interaction between fresh water and sea water due to the tidal events that greatly affect the value of salinity. This interaction is one of the influences on the occurrence of the spread of salinity. The purpose of this study was to describe the distribution of salinity and flow velocity that affected salinity in the Tallo Estuary area, especially in the riverbed area during high tide and low tide conditions. Data collection was carried out in the Tallo River Estuary area with a distance between 400 m. By using ADCP (Acoustic Doppler Current Profiler) and CTD (Conductivity Temperature Depth). The pattern of spreading salinity is illustrated by the ArcGis 10.3 program. The results showed an increase in salinity found in the Muara Tallo area when tide conditions and conditions receded into the river with a distance of 3.6 km, as well as flow velocities that affect salinity where at an increase in flow velocity will result in increased salinity while at low tide the flow rate will result in decreased salinity. Based on water classification, the Tallo Estuary area can be categorized as mostly brackish water.