Achmad Syarifudin, Eka Puji Agustini
1 Faculty of Vocation, Bina Darma University
2 Faculty of Computer Science, Bina Darma University
Jalan AhmadYani No.3, Plaju,Palembang
e-mail: syarifachmad6080@yahoo.co.id, eka puji@binadarma.acid
Abstract
Musi river is the largest river in Palembang with a length of more than 750 kilome-
ters and an average width of 540 meters where the maximum width of 1,350 meters
is located around the Kemaro island. Basically, sedimentation in the Musiriver does
include sedimentation due to the high level meeting between the Musi river currents
and ocean currents in the Bangka Strait. The silting condition of Musi river is get-
ting more severe because of the sludge that reaches about 40 cm per month. In fact,
the volume of sludge could reach 2.5 million meter. There are 13 siltingpoints along
the Musi river shipping channel from the BoomBaru port to Bangka Strait. Four
points are already very vulnerable because of the silting reaches up to 4 meters. The
location which is quite compressis from the northern Payung Island to te estuary,
while the location of the worst silting among others is on the outside verge of the
Jaranstrait and the water groove of the southern part of the Payung island sedimen-
tation reaches 7 km, so the boat that crosses the groove of Musi river should be guided
against the tide that occurs. This research was conducted by using the approach of
software models MIKE 21 Flow Model and the results obtained from this study is the
pattern of movement of the
ow between the other directions and speed of currents
and hydrodynamic model of the depth of the river starting from the outside verge to
the Musi river which aected the down tide.
Keywords : P
ow pattern, Musi River, Mike-21, Flow model
1 INTRODUCTION
Musiriver is the largest river in Palembang with a length of more than 750 kilometers
and an average width of 540 meters where the maximum width of 1,350 meters is located
around the Kemaro island and the minimum width of 250 metersis located around the MusiII
Bridge. Musiriver has two islands, namely Kembaro (Kemaro) and Kerto islands. The three
other major riversare the Ogan river with an average width of 236 meters, Oganriver with an
average width of 211 meters and the Keramasan river with an average width of 103 meters
[1].
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Musiriver is not only used by people around the course but also by big companies lo-
catedalong the Musi river. They use the Musiriver to deliver the products and bring in the
raw material through the vessel. There are so many big ships and even very large pacing in
the Musi river. Some companies located along the Musiriverare PT. Pertamina, PT. Sriwi-
jaya fertilizer (PUSRI), WilmarGroup and the Port of Boom Baru, and Port at 35 ilir. The
role of the Musiriver is very vital and this so called pulse of Palembang city is nowhauntedby
various problems. One of the problems is the river silting whichcontinueto increase every
year. Of course this is very detrimental to the Government of South Sumatra Province, es-
pecially at this time of South Sumatra province being intensively attracts investors to invest
in the business sector. Basically, sedimentation in the Musiriver does include a high level of
sedimentation caused by the current meeting betweenMusi river and ocean currents in the
Bangka Strait.
The silting condition of Musi river is getting more severe because of the sludge that
reaches about 40 cm per month. In fact, the volume of sludge could reach 2.5 million meter.
There are 13 silting points along the Musi river shipping channel from the Boom Baru port
to Bangka Strait. Four points are already very vulnerable because of the silting reaches up
to 4 meters. The location which is quite compressis from the northern Payung Island tothe
estuary, while the location of the worst silting among others is on the outside verge of the
Jaran strait and the water groove of the sedimentation in the southern part of the Payung
island reaches 7 km, so the boat that crosses the groove of Musi river should be guided against
the tide that occurs.
2 RESEARCH METHODHOLOGY
This study was carried out with the modeling and simulation of
ow patterns and sediment
transport in water area of the Bangka Strait in position 2.07 – 2.38 of South Latitude and
104.85 – 105.17 of East Longitude. The research location [2, 3] is in gure 1.
Figure 1: Map of Research Location.
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2.1 Tools and Materials
The tools used in this research are as in Table 1 below
Table 1: List of tools used in the study
No Name of Tools Number of Uses
1 Stationery 2 pieces Writing to recording data
2 Computer (RAM 2 GB) 1 unit Performing general modeling
3 Printer 1 unit Displaying form of report
4 Software MIKE-21 Model, MS-Excel Performing modeling and data processing
5 Dongle (licensed program) 1 pieces Activating the software MIKE-21 FM
6 Laptop and Printer 1 pieces Assisting to preparing reports
The data used in the analysis are as shown in Table 2.
Table 2: Factors and Willis Deutsch
No Data properties Data type Sources Units
1 Tidal Primary Field m
2 Bathymetry Secondary Bakosurtanal/Pelindo m
3 The direction and speed of current Primary Field ( ) & m/s
4 River capacity Primary Field m3/s
5 The direction and speed of wind Secondary BMG () & m/s
6 Base of Sediment Primary Field mm or
7 The concentration of suspended sediment Primary Field mm/l
8 Discharge of sediment from the river Primary Field gram/s
Figure 2: The hydrodynamic model of the river water velocity direction
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2.2 MIKE-21 FM Simulation
MIKE-21 Hydrodynamic Module (HD Module) is a mathematical model to calculate the
hydrodynamic behavior of the water against a wide variety of styles functions, for example,
certain wind conditions and water levels are specied in the open model of the boundary. HD
module simulates the water level and the current dierences in the various styles function in
lakes, estuaries, and beaches [4, 5].
3 RESULTS AND DISCUSSIONS
After all the boundary condition isdiscussed in the modeling, the results of global model
output on the outside verge of the Musi river are as in gure 2, gure 3 and gure 4 below.
Figure 3: Model hydrodynamic surface elevation watersheds
Figure 4: The total depth of the hydrodynamic model of river
ow
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4 CONCLUSSIONS AND RECOMMENDATIONS
From the analysis of thestudy, it can be summarized that:
1. Greatest speed directionoccurred on the Musi river bank ranges between 300-350 de-
grees.
2. Thresold elevation of the outer surface of the Musiriver ranges between 0.20 m –
0.40mwill aect the free area for ships to perform well and safe movement.
3. The total depth of water occurs at 15-30 m and therefore contributes to the
ow of the
ship movement into the Musiriver as a whole.
4. As a recommendation of this study, it is necessary to study more detail about the
correlation of sediment movement and move of the ship to the amount of sediment in
the Musi river [6].
Acknowledgments. I would like to say thank you to Prof. Ir. Bochari H. Rachman,
M.Sc, Rector of Bina Darma University, Prof. Dr. H. Zainuddin Ismail, MM, Vice Rector
I and Dr. Sunda Ariana, M.M., M.Pd., Vice Rector II of Bina Darma University who are
pleased to give permission and assistance to the author, especially in the preparation of the
data so that the paper can be completed.
References
[1] Anonymous, Department of Public Works BM & NRM Palembang, 2012.
[2] Anonymous, Management of Natural Resources, Indonesia, 2010.
[3] H. Suprianto, et al., “Potentials and constraints of water management measures for tidal
lowlands in South Sumatra, Case study in a pilot area in Telang I. 9 th Inter-Regional
Conference on Environment-Water,” Delft, the Netherlands, 2006.
[4] D. Software, “Mike-11 Reference Manual,” ed: Danish Hydraulic Institute, Denmark,
2007.
[5] E. Schultz, Land and Water Development: Finding a Balance Between Implementation,
Management and Sustainability: International Institute for Infrastructural, Hydraulic and
Environmental Engineering, 1993.
[6] S. Munir, Role of Sediment Transport in Operation and Maintenance of Supply and De-
mand Based Irrigation Canals: Application to Machai Maira Branch Canals: UNESCO-
IHE PhD Thesis: CRC Press, 2011.
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