Kajian Permeabilitas untuk Hidrologi Simulasi Banjir Kawasan Industri “X”

Rista Fitri Indriani, RFI (2021) Kajian Permeabilitas untuk Hidrologi Simulasi Banjir Kawasan Industri “X”. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kondisi daerah studi tidak alamiah dengan perubahan lahan tambak menjadi lahan indutri. Adanya perubahan lahan tersebut, penelitian bertujuan mengetahui pengaruh nilai permeabilitas untuk simulasi banjir. Model uji permeabilitas diperoleh dari uji ayakan berdasarkan distribusi ukuran butir. Sampel yang digunakan yaitu B1 dengan litologi sandstone dan B2 dengan litologi limestone. Berdasarkan analisis USCS pada uji ayakan sampel B1 dan sampel B2 diklasifikasikan poorly graded sand with clay. Model uji permeabilitas terdiri dari sampel B1 dengan jumlah 10 sampel dan sampel B2 dengan jumlah 10 sampel. Pada studi ini digunakan uji permeabilitas falling head test,sehingga diperoleh nilai permeabilitas dan infiltrasi pada sampel B1 dan B2. Koefisien aliran diperoleh dari analisis infiltrasi tanah berdasarkan jurnal kehutanan (Juli A., 2017). Pada hasil koefisien aliran sampel B1 dan B2, kelas koefisien aliran rendah (C=0.25) pada sampel B1#4, B1#8, B1#16, B2#4, B2#8, dan B2#16 dengan nilai permeabilitas tinggi (K=0,08-0,13 cm/s) dan infiltrasi tinggi (I=0,46-0,71 cm/s),kelas koefisien aliran sedang (C=0,5) pada sampel B1#30, B1#50, B2#30, dan B2#50 dengan nilai permeabilitas sedang (K=0,0014-0,0015 cm/s) dan infiltrasi sedang (I=0,34-0,39), serta kelas koefisien aliran tinggi (C=0,75) pada sampel B1#70, B1#100, B1#140, B1#200, B1L#200, B2#70, B2#100, B2#140, B2#200, dan B2L#200 dengan nilai permeabilitas rendah (K=0,00001-0,0002 cm/s) dan infiltrasi rendah (I=0,002-0,06 cm/s). Dari hasil analisis data permeabilitas terhadap ukuran butir,semakin tinggi permeabilitas tanah diperoleh infiltrasi tinggi dan koefisien aliran rendah. Semakin rendah koefisien aliran, maka air yang masuk ke tanah lebih besar daripada air limpasan. Koefisien aliran yang diperoleh dapat digunakan sebagai data parameter penelitian rencana tindak lanjut pada simulasi banjir.
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The condition of the study area is unnatural with the change of pond land to industrial land.This study aims to determine the effect of permeability values for flood simulations.Permeability test model is obtained from a sieve test based on grain size distribution.The samples used were B1 with sandstone lithology and B2 with limestone lithology.Based on the USCS analysis on the sieve test sample B1 and sample B2 were classified as poorly graded sand with clay. The permeability test model consists of sample B1 with a total of 10 samples and sample B2 with a total of 10 samples.In this study, a falling head permeability test was used, in order to obtain the permeability and infiltration values in samples B1 and B2.Flow coefficient is obtained from soil infiltration analysis based on forestry journal (July A.,2017). In the results of sample flow coefficients B1 and B2, the class of low flow coefficients (C=0.25) with high permeability values (K=0.08-0.13 cm/s) and high infiltration (I=0.46-0.71 cm/s), moderate flow coefficient (C=0.5) with moderate permeability (K = 0.0014-0.0015 cm/s) and moderate infiltration (I=0.34-0.39), and class high flow coefficient (C=0.75) with low permeability (K=0.00001-0.0002 cm/s) and low infiltration (I=0.002-0.06 cm/s). From the analysis of permeability data on grain size, the higher the permeability of the soil, the higher the infiltration and low flow coefficient. The lower the flow coefficient, the greater the water entering the ground than the runoff. The obtained flow coefficient can be used as parameter data for follow-up planning research in the flood simulation.

Item Type:	Thesis (Undergraduate)
Subjects:	G Geography. Anthropology. Recreation > GB Physical geography > GB1399.9 Floods
Divisions:	Faculty of Civil Engineering and Planning > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Rista Fitri Indriani
Date Deposited:	09 Mar 2021 06:23
Last Modified:	22 Jun 2021 09:29
URI:	http://repository.its.ac.id/id/eprint/83921

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