Distributions of water temperature at the bottom in semi-enclosed Saro estuary, Takalar, Indonesia

• Main Authors: Rohani, Imam, Paroka, Daeng, Thaha, Muhammad Arsyad, Hatta, Mukhsan Putra
• Format: Conference Proceeding
• Language: English
• Subjects: Ecological effects; Estuaries; High temperature; High tide; Rivers; Saline water; Seawater; Temperature gradients; Upstream; Water circulation; Water quality; Water temperature; Waterways
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0095218

Narrowing in semi-closed estuaries caused water circulation, both freshwater flow from rivers and saltwater from the sea to be obstructed. In the back-barrier region, seawater to be isolated affects the distribution of water temperature in the estuary. The purpose of this study was to describe of water temperature at the bottom in semi-closed estuaries at the tide conditions. This research is field research, at the Saro River, Takalar, Indonesia. The results are at high tide, the bottom temperature of the estuary ranges from 28.3 °C - 29.2 °C, with the upstream pattern having a higher base temperature value. At low tide, the bottom temperature of the estuary is 29.2 °C - 30.6 °C, with the trend to go downstream to the mouth of the estuary is getting higher. The mouth of Saro river, which is classified as shallow, has a significantly high effect on the bottom temperature of the estuary. The back-barrier region causes seawater to be isolated from the main waterway in the estuary, causing high temperatures. Tides and the flow of water from the upstream of the river cannot flow seawater in the estuary (back-barrier region) to the sea, where the temperature difference between the estuary and beyond waters in the sea reaches 2 °C. An increasing water temperature can cause water quality problems and impact on aquatic ecology.