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All Journal Media Ilmiah Teknik Lingkungan
Zulfa Amala
Universitas Singaperbangsa Karawang
Environmental Science

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Water Availability Analysis of the Cilamaya Watershed Using the F.J. Mock Method: Analisis Ketersediaan Air DAS Cilamaya Berdasarkan Metode F.J. Mock Shafa Camilla Az-zahra; Wilma Nurrul Adzillah; Zulfa Amala
Media Ilmiah Teknik Lingkungan (MITL) Vol. 11 No. 1 (2026): Media Ilmiah Teknik Lingkungan (MITL)
Publisher : ​Institute for Researches and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/mitl.v11i1.11517

Abstract

Water availability is a critical factor in sustainable watershed management, particularly in areas experiencing climatic variability and land-use pressure such as the Cilamaya Watershed in West Java, Indonesia. This study aims to analyze water availability in the Cilamaya Watershed using the F.J. Mock hydrological method based on climatological data and watershed characteristics. The data used include rainfall, air temperature, relative humidity, wind speed, and sunshine duration, which were processed to estimate the water balance and monthly discharge. The results indicate that river discharge in the Cilamaya Watershed exhibits strong seasonal fluctuations, with high flows during the rainy season and a sharp decline during the dry season. During several dry months, the model results show water deficit conditions, as low rainfall is unable to compensate for water losses through evapotranspiration. The dependable flow analysis (Q90) reveals that reliable water availability occurs mainly during the rainy season, while in the dry season the watershed is unable to guarantee a sustainable minimum flow. These findings demonstrate that the Cilamaya Watershed has a high level of hydrological vulnerability, highlighting the need for adaptive water resources management strategies, particularly through strengthening infiltration functions and regulating water use during dry periods.
Analysis of Small-Scale Tofu Industry Wastewater Characteristics for Optimal Wastewater Treatment: Analisis Karakteristik Limbah Cair Pada Industri Tahu Skala Rumahan untuk Pengolahan Limbah Cair yang Optimal Sethiavi Rizki; Wilma Nurrul Adzillah; Zulfa Amala
Media Ilmiah Teknik Lingkungan (MITL) Vol. 11 No. 2 (2026): Media Ilmiah Teknik Lingkungan (MITL)
Publisher : ​Institute for Researches and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/mitl.v11i2.12606

Abstract

Small-scale tofu industries have the potential to pollute the environment with the liquid waste generated during the tofu-making process. Liquid waste from the tofu industry has COD and BOD concentrations of up to 9,308 mg/L and 3,191 mg/L, respectively, which exceed the quality standards set forth in Ministry of Environment Regulation No. 5 of 2014. This study aims to identify and analyze the characteristics of liquid waste in the tofu industry to determine the appropriate treatment method based on the BOD/COD ratio. The research was conducted by collecting samples using the grab sampling method, followed by an analysis of the results of the waste characteristic tests. Based on the research results, it was found that one of the liquid wastes from the tofu industry in Karawang Regency had COD and BOD values of 6,062.5 mg/L and 570.5 mg/L, respectively, with a BOD/COD ratio of 0.09. These conditions prevent the direct application of biological treatment and necessitate pre-treatment in the form of physical or chemical treatment combined with biological treatment, such as wastewater treatment using filtration and constructed wetlands.
Co-Authors Sethiavi Rizki Shafa Camilla Az-zahra Wilma Nurrul Adzilla