TEMPORAL LAG EFFECTS OF ALLUVIAL SYSTEM UNDER UNSTEADY FLOW CONDITIONS

Arie Setiadi Moerwanto

Abstract


Analisis perubahan morfologi sungai pada kondisi aliran tidak langgeng menuntut suatu submodel numerik yang dapat secara cermat menyimulasikan kelambanan respons temporal sistem aluvial. Pada kondisi hidrodinamika yang berubah sangat cepat, corak dasar sungai tidak dapat secara serentak merespons perubahan tersebut. Karena corak dasar sungai sangat terkait erat dengan laju angkutan sedimen dasar, maka keberhasilan pemodelan kelambanan temporal sistem aluvial akan meningkatkan ketelitian analisis perkembangan corak dasar sungai, prediksi tinggi muka air, laju angkutan sedimen dasar maupun layang dan pada akhirnya akan meningkatkan ketelitian analisis perubahan morfologi sungai. Tulisan ini membahas secara rinci cara pemodelan numerik efek-efek kelambanan temporal sistem aluvial menggunakan metode elemen hingga termasuk pengujian unjuk kerja model.

Keywords


Kelambanan respon temporal, sistem aluvial, metoda elemen hingga, aliran tidak langgeng, corak dasar sungai.

References


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DOI: https://doi.org/10.32679/jth.v2i1.241

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