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All Journal JST ( Jurnal Sains Terapan ) Media Ilmiah Teknik Sipil Abdimas Universal Buletin Profesi Insinyur Journal of Marine-Earth Science and Technology Jurnal Ilmiah Teknik Sipil Transukma
Kencanawati, Martheana
Universitas Balikpapan
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Social Sciences Other

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INFILTRATION CAPACITY DERIVATIVES AND SOIL MOISTURE EQUATION MODEL VALIDATION Kencanawati, Martheana; Iranata, Data; Maulana, Mahendra Andiek; Damarnegara, A. A. Ngurah Satria
Journal of Marine-Earth Science and Technology Vol. 5 No. 3 (2024): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v5i3.4183

Abstract

Infiltration is an essential parameter in runoff, although its simulation remains challenging due to soil heterogeneity and complex structures. As soil moisture increases, infiltration capacity decreases nonlinearly, stabilizing when saturation is reached. Therefore, this study aimed to improve and validate the Horton Equation using field observations to determine infiltration capacity in watersheds. Overland flow observations were used to assess simulation accuracy from the previous studies, the sensitivity curve number was obtained at a range of 49–57. The results showed that high precipitation saturated initial losses and infiltration capacity, producing a greater runoff coefficient. The sensitivity curve numbers were obtained differently between Pandantoyo sub-basin (CN 49–53) and Ngadirejo sub-basin (CN 53–55). From modification runoff coefficient values (dimensionless,) for an ungauged catchment, it could be obtained function of f (R24, Sm), LU. Soil moisture value between Pandantoyo and Ngadirejo sub-basin was 3,562. It was also discovered that C was Q from AWLR observation and time of concentration, which influenced water discharge. A longer Tc led to lower discharge without increasing water levels. Furthermore, SCS Direct runoff method had minimal impact on runoff coefficients.
Co-Authors Abdul Syahid Agus Nur Salam Anang Yahya Bayu Rendi Pratama Damarnegara, A. A. Ngurah Satria Data Iranata Hamriani Ryka Irna Hendriyani M. Ramdhan Maslina Maslina Maulana, Mahendra Andiek Mustakim Rahmat Rahmat Rahmat Rahmat Rendy Agus Rulianto Suheria Mulia Devi Suheriah Muliadevi Wildan Noviatna