Analysis of Physical and Chemical Conditions in Sidakarya Coastal Waters, Bali

Sidakarya Coast is one of the developing ecotourism and fisheries areas in Denpasar City, Bali Province. This area has ecotourism and fishery potential that needs to be maintained so that ecotourism and fishery activities that depend on this area can enjoy economic prosperity. Activities around the coast of Sidakarya, such as ecotourism, housing areas, traditional fisheries, and agriculture, have indirectly affected the quality of coastal waters. This research was one of the efforts to identify the physical and chemical parameters of the coastal waters, including, salinity, temperature, DO (Dissolved oxygen), water transparency and pH. This research was conducted in April 2021 with five measurement points of water quality factors. Measurement location determination using the purposive sampling method. Water quality analysis was carried out by comparing the measurement results with values of water quality standards based on the State Minister Decree of the Environment Number 51 of 2004 for marine tourism and marine biotas and reffering to the State Minister Decree of the Environment Number 115 of 2003 concerning Rules for determining the situation with quality of water. The measurement results showed the value of Sidakarya water quality parameters ranging from 30.2-30.6 °C for temperature, 0.6-5 meter for water transparency, 29.7-33.7°/oo for salinity, 4.94-7.04 mg/l for DO and 6.9-7.4 for pH. The results obtained that the condition of Sidakarya waters in general still meets the water quality; only the water transparency parameter at the location near the estuary was below the quality standard. The after effects of the estimation of the pollution index (PI) on each sampling station show the PI value <1 or meets the quality standards for marine biota (stations 1 and 2) and meet the quality standards for marine tourism (stations 3,4 and 5). The results indicated that Sidakarya waters can still be developed for ecotourism areas and limited fisheries.