59
Temperature
Temperature is one parameter that influences number of oxygen directly. Water temperature will influence chemical and biology processing velocity.
Temperature change on sea surface influences life circle of fish and seaweed. Distribution of temperature is presented in Fig 4.11. Generally, distribution of
temperature on research area is homogeneous, ranging between 26 C – 29
C.
Current Velocity
Current velocity data was acquired from Dishidros. These data cover 1 year time period. From data observation, current velocity on research area is
varied, but is extreme between April and October. Current velocity is presented in Fig 4.12.
Current velocity distribution gives an overview of current on Maros and its surroundings. Spatial data for current velocity interpolation used only 5 sample
points from current observation buoys of Dishidros Dishidros, 1995. Data of Indonesia current velocity map at 1 : 50.000 scale is available, where Maros is
covered by 5 observation points.
Water Depth
Topography of marine in Maros and surroundings is relatively heterogeneous. In the eastern part approximately 1500 m from coastline,
topography of marine has depth about 1 – 10 m. While, in the western part over than 1500 m from coastline, the depth of water is relatively steep 10 m – 30
m. The map is shown in Fig 4.13.
Fig 4.11. Sea Surface Temperature Map
60
Fig 4.12. Current Velocity Map
61
62 Fig 4.13. Bathymetric Map
63
Turbidity
Turbidity is influenced by dissolved material, such as solid suspension, chlorophyll, and dissolved organic. The existing materials influence sun light
penetration to water column. Turbidity was measured in Limnology laboratory, Bogor Agricultural
University in 2004. Turbidity NTU scale on research area is approximately 0.25 to 6 NTU. High turbidity has been found, approximately 3.3 to 6 NTU near
coastline. Closer to the sea, turbidity was relatively lower. Negative correlations between turbidity and brightness of water are clear if compared with sechi disk
depth cm than sechi disk depth . Turbidity map is presented in Fig 4.14.
4.2.2.2. Chemical Hydro-Oceanography Dissolved Oxygen DO
Dissolved oxygen distribution map is presented in Fig 4.15. DO is amount of dissolved oxygen that is measured in milligram per liter mgl. Composition of
oxygen in water is the main factor for fish and sea organisms life circle. Water capability to maintain dissolved oxygen is related to water temperature, for
example; colder temperature will increase dissolved oxygen content. Dissolved oxygen presents marine primer productivity level, more
dissolved oxygen content in water indicates high primer productivity. Primary productivity is a photosynthesis product. The chemical reaction from this process
is:
6CO
2
+ 6H
2
O Æ C
6
H
12
O
6
+ 6O
2
Fig 4.14. Turbidity Map
64
Fig 4.15. Dissolve Oxygen Map
65
66 Fig 4.16. Potential of Hydrogen Map
Based on standardization procedure, DO tolerance for good condition is more than or equivalent to 4 mgl. While, DO proposition is over or equivalent to
6 mgl. Dissolved oxygen in Maros is approximately between 9 to 12 mgl. Data available shown that dissolved oxygen in Maros is still appropriate to support
organism life cycle.
Potential of Hydrogen PH
PH was done to measure hydrogen ion concentration of water, showing acid and alkali of water. PH value is influential towards dissolved substance and
nutrient availability for organism. PH measurement in the research area is still normal 6.5 – 7.5. From PH spatial distribution, mixing area between seawater
and fresh water showed relatively lower PH. PH distribution map is represented in Fig 4.16.
4.3. Coastal Ecosystem
