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All Journal BERITA BIOLOGI JURNAL BIOLOGI INDONESIA Jurnal Akuatika Indonesia LIMNOTEK - Perairan Darat Tropis di Indonesia OLDI (Oseanologi dan Limnologi di Indonesia) JURNAL SUMBER DAYA AIR Best Journal (Biology Education, Sains and Technology) Barakuda 45 Manilkara: Journal of Bioscience
Agus Arifin Sentosa, Agus Arifin
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PREDIKSI TINGKAT KEKERUHAN (TURBIDITAS) MENGGUNAKAN CITRA SATELIT SENTINEL-2A DI WADUK JATILUHUR, JAWA BARAT Rahman, Arip; Astuti, Lismining Pujiyani; Warsa, Andri; Sentosa, Agus Arifin
JURNAL SUMBER DAYA AIR Vol 17, No 2 (2021)
Publisher : Direktorat Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jsda.v17i2.697

Abstract

Turbidity is one of the remote sensing indicators on the  reservoir physical characteristics that can reduce its brightness level. Measuring reservoir physical characteristics traditionally are expensive and time consuming as well. Therefore, remote sensing is used as an alternative for turbidity measurement because it can provide data and products spatially, temporally as well as synoptically with low cost. This study aims to obtain an algorithm using a combination of in-situ turbidity data measurement and Sentinel-2A satellite imagery data. The resulting algorithm can be used to predict and map turbidity in Jatiluhur Reservoir. Based on the multiregression between B3 (green band) and B4 (red band) with in-situ turbidity data measurement, it is obtainted that the regression coefficients are a = 76.77, b = 63.22 and c = -34.31 respectively, with the equation of Y = 76, 77+63.22 X1-34.31X2 (Y=predicted turbidity, X1=lnB3, X2=lnB4). The correlation value between in situ and turbidity prediction is quite strong with a coefficient of determination (R2) of 0.60, and Root Mean Square Error (RMSE) of 1.95 NTU. Based on Mean Absolute Percentage Error (MAPE) analysis, the deviation is 31.1%. High levels of turbidity can reduce the main productivity of water and its organisms, especially in respiratory and visual problems. Sedimentation caused by high turbidity levels can make siltation which results in reservoir capacity loss.Keywords: Turbidity, remote sensing, Sentinel-2A satellite imagery data, Jatiluhur Reservoir, siltation
Analisis Konsentrasi Nitrat Dan Fosfat Sebagai Indikator Kesuburan Perairan Di Waduk Ir. H. Djuanda Purwakarta Musyarrifah, Widiyatul; Sentosa, Agus Arifin; Dwiatmojo, Santoso; Kusumaningtyas, Dyah Ika; Kurniawati, Heny; Kusumaningrum, Elzabeth Novi
BEST Journal (Biology Education, Sains and Technology) Vol 8, No 2 (2025): September 2025
Publisher : Program Studi Pendidikan Biologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/best.v8i2.11710

Abstract

Waduk Ir. H. Djuanda (Waduk Jatiluhur) adalah bendungan serbaguna yang dimanfaatkan untuk berbagai kepentingan oleh masyarakat. Semakin banyak kegiatan manusia di sekitar perairan, semakin besar potensi perubahan kesuburan perairan yang berpengaruh pada keberadaan Nitrogen dan fosfor sebagai unsur hara esensial bagi perairan. Salah satu bentuk dari unsur hara Nirtogen dan Fosfor adalah Nitrat dan Fosfat. Pengambilan sampel air dalam penelitian ini dilakukan menggunakan metode purposive random sampling pada delapan stasiun dengan dua kedalaman berbeda, sedangkan analisis kandungan nitrat dan fosfat dilakukan menggunakan metode spektrofotometri UV-Vis sesuai dengan standar SNI. Penelitian ini bertujuan untuk menganalisis tingkat kesuburan perairan Waduk Ir. H. Djuanda, Purwakarta, berdasarkan konsentrasi nitrat dan fosfat sebagai indikator kesuburan perairan. Hasil analisis menunjukkan bahwa konsentrasi nitrat di perairan Waduk Ir. H. Djuanda berkisar antara 0,50 mg/L hingga 2,09 mg/L, dengan nilai rata-rata sebesar 1,15 mg/L. Sementara itu, konsentrasi fosfat tercatat antara 0,025–0,371 mg/L, dengan nilai rata-rata 0,089 mg/L. Berdasarkan klasifikasi konsentrasi nitrat dan fosfat menurut Volenweider (1969) dalam Effendi (2003), secara umum perairan Waduk Ir. H. Djuanda dikategorikan sebagai mesotrofik berdasarkan kadar nitrat, sedangkan berdasarkan kadar fosfat termasuk dalam kategori eutrofik.
Squid Catching Productivity with Cast Net at the Nusantara Kejawanan Fishing Port, West Java Sentosa, Agus Arifin; Riyanto, Jagad Slamet; Hadi, Abdul; Suryandari, Astri; Putri, Didha Andini; Wahyuningsih, Sri; Kusumaningtyas, Dyah Ika; Hendrawan, Andika Luky Setiyo; Hedianto, Dimas Angga; Susilawati, Evi; Indriatmoko, Indriatmoko; Widarmanto, Nanang; Gumilang, Andi Perdana; Sudarto, Sudarto; Astuti, Iswari Ratna; Indrianto, Rachmat
Barakuda 45: Jurnal Ilmu Perikanan dan Kelautan Vol 7 No 2 (2025): November
Publisher : Fakultas Perikanan dan Ilmu Kelautan Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/barakuda45.v7i2.701

Abstract

The Nusantara Fishing Port (PPN) Kejawanan is located in the Lemahwungkuk District of Cirebon City. Cast nets are a widely used fishing gear for catching squid. This study aims to describe how cast nets are operated and to analyze variations in squid catch productivity per trip and per gross tonnage (GT) of the vessel. The method used was a survey method through direct observation and interviews to obtain technical data on fishing operations and catch results. Observations were made on seven (7) cast net vessels per month (n = 7 vessels/month) during the period January–March 2024. The results of the study show that during January–March 2024, the highest productivity value occurred in January at 7,349 kg/trip and the lowest value was 6,224 kg/trip in February. Meanwhile, the highest productivity per GT of vessel catch was in January at 183.73 kg/GT of vessel, and the lowest was in February at 121.02 kg/GT. This variation in productivity between months occurred in the context of the season and was related to a combination of technical operational factors and fishing environmental conditions.
Co-Authors Abdul Hadi Andi Perdana Gumilang Andri Warsa Arip Rahman Astuti, Iswari Ratna Atmojo, Santoso Dwi Chodrijah, Umi DANU WIJAYA Dwiatmojo, Santoso Evi Susilawati Fahmi Fahmi Hedianto, Dimas Angga Hedianto, Dimas Angga Hendayana, Yayat Hendrawan, Andika Luky Setiyo Heny Kurniawati Hidayat, Panjalu Fikri Indrianto, Rachmat Indriatmoko Indriatmoko, Indriatmoko Joni Haryadi, Joni Kusumaningrum, Elzabeth Novi Kusumaningtyas, Dyah Ika Lismining Pujiyani Astuti, Lismining Pujiyani Mujiyanto Mujiyanto Musyarrifah, Widiyatul Putri, Didha Andini Riyanto, Jagad Slamet Sarbini, Rakhmat Sari, Fatma Devi Nur Indah Sri Wahyuningsih Sudarto Sudarto Suryandari, Astri Suryandari, Astri Widarmanto, Nanang