Kombinasi Sekat Dan Tanaman Air Untuk Optimalisasi Bangunan Penangkap Sedimen

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Abstract: Suspended load transported by irrigation water should be inhibited to enter irrigation channels and farms due to its effects on channel and land aggradations. Current sediment traps are perceived to be costly in land requirement and construction cost. This research is intended to obtain an optimum length: width ratio for sediment traps, in order to minimize land requirement by extending their length without extra land. Previous research on wastewater suggested that combination of baffle and macrophyte could increase sedimentation rate of sediment that behaves as suspended solids. This objective is proposed by adding baffles into the current sediment trap model, which is rectangular, followed by introduction of macrophyte into certain models. This effort increases length: width ratio significantly, depending on the number of baffles. Based on theory, the longer the path, the more likely the sediment settles. However, more baffles do not always increase sedimentation, since velocity and turbulence also take part in sedimentation process.Experiment was conducted by introducing 1, 2, 3, 4, 5, and 6 cross baffles with 5 discharge for each configuration. From the experiment, it was found that the optimum sedimentation was gained by introducing1, 2, and 3 baffles into the current model. These 3 models were later run with combination with macrophyte. It was found that 3 baffles combined with macrophyte, performed better in sedimentation, with an average passing was 28.8%. This configuration resulted in an increase in Length: Width ratio of 6.
Key word: Sediment trap, suspended solids, baffle, macrophyte
Penulis: Revalin Herdianto, Rahmi Hidayati
Kode Jurnal: jptsipildd100070

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Jp Teknik Sipil dd 2010