Safitri, Kafila Arzy (2022) Analisis Koefisien Aliran Permukaan Berdasarkan Metode Hassing Pada Desa Cermen-Lampah Kabupaten Gresik. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Daerah penelitian berada di Desa Cermen dan Desa Lampah yang terletak di Kecamatan Kedamean Kabupaten Gresik. Wilayah studi berada di sisi selatan Sungai Kali Lamong apabila musim hujan kerap mengalami banjir akibat luapan sungai. Untuk mengetahui besar aliran permukaan di daerah penelitian dibutuhkan nilai koefisien aliran sebagai salah satu parameter perhitungannya. Semakin tinggi nilai koefisien aliran, maka semakin banyak air yang terlimpas di permukaan. Banyaknya air yang terlimpas di permukaan menandakan kurangnya kemampuan tanah dalam meresap air sehingga dari informasi tersebut diketahui daerah-daerah yang memerlukan penanganan khusus. Penelitian bertujuan untuk mengetahui nilai koefisien aliran daerah studi yang berguna sebagai kajian awal teknis hidrologi. Penelitian ini menggunakan metode Hassing yang membutuhkan data penelitian berupa data citra DEM, landsat 8, serta data hasil uji laboratorium tanah. Data citra DEM yang digunakan adalah data DEM Open Topography yang selanjutnya akan diolah dan diklasifikasikan menggunakan Arcgis menjadi peta klasifikasi kemiringan lereng. Sementara data landsat 8 diolah dan diklasifikasikan menggunakan metode Maximum Likelihood classification menjadi peta klasifikasi tutupan lahan. Dalam penelitian ini dilakukan uji ayakan untuk menganalisis ukuran butir tanah sehingga diketahui persebaran ukuran butir dan teksturnya. Penelitian ini juga dilakukan uji infiltrasi menggunakan infiltrometer secara in situ dan dilakukan perhitungan menggunakan metode Horton. Dari hasil nilai laju infiltrasi, diolah menjadi peta laju infiltrasi. Peta klasifikasi kemiringan lereng, peta tutupan lahan, dan peta tekstur tanah selanjutnya dioverlay pada Arcgis dan didapatkan data untuk klasifikasi koefisien aliran. Hasil tersebut kemudian dikorelasikan dengan nilai laju infiltrasi yang didapatkan. Nilai koefisien aliran yang diperoleh dalam penelitian ini dapat digunakan sebagai data parameter kajian awal untuk teknis hidrologi seperti perhitungan debit puncak atau laju aliran puncak.
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The research area is in the Village of Cermen and Village of Lampah which are located in the Kedamean sub-district, Gresik Regency. The study area is located on the south side of the Kali Lamong River when the rainy season often experiences flooding due to river overflow. To determine the amount of surface runoff in the study area, the flow coefficient value is needed as one of the calculation parameters. The higher the flow coefficient value, the more water that runs off the surface. The amount of water that runs off the surface indicates the lack of ability of the soil to absorb water, so from this information it is known which areas require special handling. This study aims to determine the value of the flow coefficient of the study area which is useful as an initial hydrological technical study. This study uses the Hassing method which requires research data in the form of DEM image data, Landsat 8, and data from soil laboratory tests. The DEM image data used is DEM Open Topography data which will then be processed and classified using ArcGIS into a slope classification map. Meanwhile, Landsat 8 data is processed and classified using the Maximum Likelihood classification method into a land cover classification map. In this study, a sieve test was carried out to analyze the grain size of the soil so that the distribution of grain size and texture was known. This study also carried out an infiltration test using an in-situ infiltrometer and calculated using the Horton method. From the results of the value of the infiltration rate, it is processed into a map of the infiltration rate. The slope classification map, land cover map, and soil texture map were then overlaid on Arcgis and obtained data for runoff coefficient classification. These results are then correlated with the value of the infiltration rate. The runoff coefficient values obtained in this study can be used as initial study parameter data for hydrological techniques such as peak discharge calculations or peak flow rates.
| Item Type: | Thesis (Other) |
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| Additional Information: | RSGf 363.34 Saf a-1 2022 |
| Uncontrolled Keywords: | Metode Hassing, Koefisien Aliran, Laju infiltrasi. Hassing method, infiltration, runoff coefficient. |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Marsudiyana - |
| Date Deposited: | 21 May 2026 03:47 |
| Last Modified: | 21 May 2026 03:47 |
| URI: | http://repository.its.ac.id/id/eprint/133298 |
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