Model Eutrofikasi 2-Dimensi Berlapis Waduk Cirata

Eko Harsono

Abstract


Badan air Waduk Cirata yang berada di Kabupaten Cianjur, Bandung, dan Purwakarta Provinsi Jawa Barat, telah terjadi eutrofikasi karena limbah budidaya ikan jaring apung. Model eutrofikasi 2-dimensi berlapis telah dikembangkan untuk mempelajari sejauh mana sebaran petak karamba jaring apung berpengaruh pada eutrofikasi, dan optimasi jumlah petak karamba jaring apung tiap kabupaten sesuai dengan status trofik yang diinginkan di badan air Waduk Cirata. Kalibrasi dan validasi model menggunakan data 4 titik observasi konsentrasi khlorofil-a pada tiga variasi elevasi muka air waduk menunjukkan hasil perhitungan sesuai dengan observasi. Simulasi model menunjukkan, pola sebaran jumlah petak karamba jaring apung per segmen telah meyebabkan 20 30% luas area Waduk Cirata berstatus eutrofik. Optimasi diperoleh alternatif 1: jika diinginkan persentase luas oligotrofik semua lapisan waduk Cirata 100%, maka jumlah petak karamba jaring apung tiap segmen dari sebaran petak karamba jaring apung yang ada saat ini dikurangi 80%, sehingga alokasi jumlah karamba jaring apung Kabupaten Cianjur, Bandung dan Purwakarta adalah 8.710 petak, 5.756 petak dan 534 petak; dan alternatif 2: jika diinginkan persentase luas eutrofik semua lapisan air Waduk Cirata 0%, maka jumlah karamba jaring apung tiap segmen dari sebaran petak karamba jaring apung saat ini dikurangi 30%, sehingga alokasi jumlah karamba jaring apung Kabupaten Cianjur, Bandung dan Purwakarta adalah 29.745 petak, 19.381 petak dan 1.874 petak

References


AWWA. 2005. Standard Method for the Examination of Water and Wastewater. 21th edition. ISBN: 0875530478. Washington DC.

Baddrudin, M. 2010. Model Perhitungan Daya Tampung Beban Pencemaran Air Danau dan Waduk. Jurnal Sumber Daya Air, vol. 6, No. 2, November 2010 , hal. 103 204.

Bahadur R., David E. Amstutz, William B. Samuels. 2013. Water Contamination Modelinga Review of the State of the Science. Journal of Water Resource and Protection, 2013, 5, 142-155.

Chapra S. C. 1997. Surface Water-Quality Modeling. The McGraw-Hill Companies. Inc. New York. 844pp.

Gang, J. Z. 2008. Hydrodynamics and Water Quality, Modeling River, Lakes, and Estuaries, John Wiley & Sons. Inc. New Jersey: 676pp.

Garno, Y. S. 2002. Beban Pencemaran Limbah Perikanan Budidaya dan Yutrofikasi di Perairan Waduk pada DAS Citarum, Jurnal Teknik Lingkungan. P3TL-BPPT vol. 3, No. 2, hal. 112 120.

Harsono, E. 2011. Kajian Hubungan antara Fitoplankton dengan Kecepatan Arus Air akibat Operasi Waduk Jatiluhur, Jurnal Biologi Indonesia Vol. 7 no.1, Juni 2011, hal. 99 -120.

Kolditz Olaf. 2002. Computational Methods in Environmental Fluid Mechanics. Springer. Berlin: 278pp.

Komarawidjaja Wage, Sutrisno Sukimin, Entang Arman. 2005. Status Kualitas Air Waduk Cirata dan Dampaknya terhadap Pertumbuhan Ikan Budidaya. Jurnal Teknik Lingkungan. P3TL-BPPT 6(1). 268 273.

Kuo, J. T., W. C Liu, R. T Lin, W. S Lung, M. D Yang & S. C Chu. 2007. Water quality Modeling for The Feitsui Reservoir in Northern Taiwan, JAWRA Journal of the American Water Resources Association. 39(3): 671-687.

Kuo, J. T., W. S Lung, C. P Yang, W. C Liu, M. D Yang & T. S Tang. 2005. Eutrophication Modelling of Reservoirs in Taiwan. Environmental Modelling & Softwaer, Vol. 20, No. 6, hal. 641 650.

Lindim C., J. L Pinho, J. M. P Vieira. 2011. Analysis of Spatial and Temporal Patterns in a Large Reservoir Using Water Quality and Hydrodynamic Modeling. Ecological Modelling Elsevier, Vol. 222, No. 2011, hal. 2485 2494.

Liu W.C., Wei-Bo Chen, Nobuaki Kimura. 2009. Impact of Phosphorus Load Reduction on Water Quality in a Stratified Reservoir-Eutrophication Modeling Study. Environ Monit Assess Springer Science (2009) 159:393406.

Liu, W.C., J. T Kuo, A. Y Kuo. 2005. Modelling Hydrodynamics and Water Quality in the Separation Waterway of the Yulin Offshore Industrial park, Taiwan. Environmental Modelling and software, Vol. 10, No. 3, hal. 309 - 328.

Martin, J. L., S. C McCutcheon. 1999. Hydrodynamics and Transport for Water Quality Modeling. CRC Press, Inc., London: 794 pp.

Pastres, R., S Ciavatta. 2005. A Comparison Between the Uncertainties in Model Parameters and Forcing Functions: its Application to a 3D Water-Quality Model. Environmental Modelling and Software 20(8), 981 989.

Schonoor J. L. 1996. Environmental Modeling, Fate and Transport of Pollutants in Water, Air, and Soil, John Wiley & Sons, Ins, New York: 682pp.

Thomann R. V, J. A Mueller. 1987. Principles of Surface Water Quality Modelimg and Control. Harper & Row. Publishers.inc. New York: 644pp.

Tsaniss I.K., Jian Wu, Huihua Shen and Caterina Valeo. 2007. Environmental Hydroulics, Hydrodynamic and Pollutant Tansport Modelling of Lake and Coastal Water. Elsevier. Amsterdam: 360pp.

Wang J. H., Y. M Shen, H Zhen, Y Feng, Z. X Wang, X Yang. 2011. Tree-Dimensional Numerical Modelling of Water Quality in Dahuofang Reservoir in China. Science China Physics, Mechanics & Astronomy, Vol. 54, No. 7, hal. 1328 1341.

Zou R., Carter, L Shoemarker, A Parker, T Henry. 2006. Integrated Hydrodynamic and Water Quality Modelling System to Support Nutrient Total Maximum Daily Load Development for Wisshickon Creek Pennsylvania. J. Environ. Eng. 132(4) 555 566.




DOI: https://doi.org/10.32679/jsda.v11i1.114

Refbacks

  • There are currently no refbacks.


Copyright (c) 2017 JURNAL SUMBER DAYA AIR

 
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 

Creative Commons License


This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.