Hydrodynamics of Bontang Seawaters: Its Effects on the Distribution of Water Quality Parameters
Abstract: Bontang is a crowded
with residential and industrial activities which produce heat waste into
surrounding waters. This condition may cause environmental problems, and
changes in water condition. Knowledge about dynamics of physic and chemical
waters condition in Bontang city is very important as an effort to address
environmental issues as part of coastal zone management and protection. The aim
of this research is to understand hydrodynamic characteristics (tide and
current) and the influence to distribution of physics and chemical in Bontang
waters base on primary data (current and tide during one month, physics and
chemicals waters data taken by in situ) and secondary data (bathymetry and tide
forecasting). Hydrodynamic simulation is based on MIKE 21 and supported by
CD-Oceanography and WR plot. The results show that the current is dominant move
toward the Southwest and Northeast with current speed ranged from 0-0,22 m.s-1.
The results of hydrodynamic simulation in the surface water show that the
current move base on tide movement with current speed ranged from 0-0,24 m.s-1.
The results of physic and chemical concentration is analysed by ArcGIS 10 to
know spatial distribution of all parameters. Surface temperature ranged from
29-31,8oC, surface density ranged from 20-20,6 ppm, salinity ranged from
33,1-33,5 ppm, dissolve oxygen concentration ranged from 0,078-0,11 ppm.
Distribution of all physic and chemical parameters is influenced by current and
tide movement.
Author: Ulung Jantama Wisha,
Semeidi Husrin, Gegar Sapta Prasetyo
Journal Code: jpperikanangg160021
