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IDENTIFIKASI KEKERINGAN HIDROLOGI DI DAS CITARUM HULU Zahroh, Nyayu Fatimah; Syafira, Sara Aisyah
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 16, No 1 (2015): June 2015
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (720.952 KB) | DOI: 10.29122/jstmc.v16i1.2635

Abstract

Intisari  DAS Citarum Hulu merupakan salah satu subdas yang paling berpengaruh di DAS Citarum dengan Waduk Sagulingnya. Besarnya debit yang masuk ke waduk menjadi sangat penting demi keberlangsungan kinerja waduk tersebut, misalnya untuk pembangkit listrik. Penelitian ini bertujuan untuk mengetahui karakteristik kekeringan hidrologi, relasinya dengan curah hujan, dan analisis frekuensi kejadian kekeringan hidrologi di DAS Citarum Hulu. Data dari pos duga air Nanjung digunakan dalam menentukan ambang batas kekeringan hidrologi yang kemudian diperoleh karakteristik kekeringan hidrologi. Hasil menunjukan bahwa rata-rata periode kekeringan di DAS Citarum Hulu terjadi mulai dari bulan Juni hingga Oktober. Terdapat keterlambatan antara waktu curah hujan turun dan waktu ketika debit naik akibat input dari curah hujan. Hasil analisis frekuensi menunjukan bahwa kekeringan maksimum yang terjadi pada tahun 1994 memiliki periode ulang 52 tahun dan kekeringan sering terjadi dengan durasi kurang dari 20 hari.  Abstract  Citarum Hulu is one of the most influential Citarum sub-basin with the Saguling Reservoir. The amount of discharge into the reservoir is very important for the sustainability of the reservoirs performance for power plants in example. This study aims to determine the characteristics of hydrological drought, its relationship with precipitation, and frequency analysis of hydrological drought occurrence in Citarum Hulu. Data from Nanjung post are used in determining the threshold of hydrological drought which then acquired the characteristics of hydrological drought. The results showed that the average period of drought in Citarum Hulu occurred from June to October. There is a lag between the time when rainfall drops and the time when the discharge rise due to the input of rainfall. Frequency analysis results showed that the maximum drought that occurred in 1994 had a 52-year return period and drought often occurs with a duration of less than 20 days.
INDEKS LABILITAS UDARA UNTUK MEMPREDIKSI KEJADIAN BADAI GUNTUR PADA PUNCAK MUSIM HUJAN TAHUN 2016 Zahroh, Nyayu Fatimah; Dewi, Ni Wayan Srimani Puspa; Harsanti, Dini
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 18, No 1 (2017): June 2017
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (610.373 KB) | DOI: 10.29122/jstmc.v18i1.1764

Abstract

IntisariPrediksi kejadian badai guntur menjadi perhatian masyarakat luas karena biasanya disertai dengan curah hujan yang tinggi, terutama untuk wilayah rawan banjir seperti provinsi DKI Jakarta. Penelitian ini bertujuan untuk analisis potensi hujan disertai badai guntur dengan menggunakan data radiosonde, analisis indeks labilitas berdasarkan parameter yang didapat dari radiometer dan analisis tren indeks labilitas 6 jam sebelum kejadian hujan. Ada beberapa tanggal yang menjadi perhatian yaitu hari dimana kejadian hujan disertai badai guntur tinggi pada tanggal 28-31 Januari 2016 serta tanggal 14 Februari 2016 dan kejadian hujan tanpa badai guntur pada tanggal 3-4 Februari 2016. Hasil penelitian menunjukan bahwa terdapat perbedaan hasil sounding sebelum hujan dan pada saat hujan. Hasil sounding sebelum kejadian hujan memiliki labilitas moderat dan sounding pada saat kejadian hujan/badai guntur memiliki labilitas kuat. Selain itu, data dari radiometer menunjukan perbedaan signifikan antara perubahan tren indeks labilitas pada 6 jam sebelum kejadian hujan yang disertai badai guntur, dan pada kejadian hujan tanpa badai guntur.    AbstractPredictions of a thunderstorm event become an attention for wide society because it is usually accompanied by heavy rainfall, especially for the flood prone area like the province of Jakarta. The objective of this study is to analyze the potential of rain with thunderstorms using radiosonde data, to analyze the instability indices based on parameters that obtained from Radiometer, and to analyze the trends of instability indices in 6 hours before the storm event. There are a few dates that become attention, the day where rain events with thunderstorms is high which is on January 28th-31st, 2016 and February 14th, 2016, and the rain event without thunderstorm on February 3rd-4th, 2016. The results showed that there are different sounding results before rain event and when it rains. The sounding result before rain event has moderate lability and sounding result when rain event has strong lability. In addition,  the data from the radiometer showed a significant difference between the predicted 6 hours prior to the event of rain with a thunderstorm and rain without thunderstorm events. 
INDEKS LABILITAS UDARA UNTUK MEMPREDIKSI KEJADIAN BADAI GUNTUR PADA PUNCAK MUSIM HUJAN TAHUN 2016 Zahroh, Nyayu Fatimah; Dewi, Ni Wayan Srimani Puspa; Harsanti, Dini
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 18, No 1 (2017): June 2017
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (610.373 KB) | DOI: 10.29122/jstmc.v18i1.1764

Abstract

IntisariPrediksi kejadian badai guntur menjadi perhatian masyarakat luas karena biasanya disertai dengan curah hujan yang tinggi, terutama untuk wilayah rawan banjir seperti provinsi DKI Jakarta. Penelitian ini bertujuan untuk analisis potensi hujan disertai badai guntur dengan menggunakan data radiosonde, analisis indeks labilitas berdasarkan parameter yang didapat dari radiometer dan analisis tren indeks labilitas 6 jam sebelum kejadian hujan. Ada beberapa tanggal yang menjadi perhatian yaitu hari dimana kejadian hujan disertai badai guntur tinggi pada tanggal 28-31 Januari 2016 serta tanggal 14 Februari 2016 dan kejadian hujan tanpa badai guntur pada tanggal 3-4 Februari 2016. Hasil penelitian menunjukan bahwa terdapat perbedaan hasil sounding sebelum hujan dan pada saat hujan. Hasil sounding sebelum kejadian hujan memiliki labilitas moderat dan sounding pada saat kejadian hujan/badai guntur memiliki labilitas kuat. Selain itu, data dari radiometer menunjukan perbedaan signifikan antara perubahan tren indeks labilitas pada 6 jam sebelum kejadian hujan yang disertai badai guntur, dan pada kejadian hujan tanpa badai guntur.    AbstractPredictions of a thunderstorm event become an attention for wide society because it is usually accompanied by heavy rainfall, especially for the flood prone area like the province of Jakarta. The objective of this study is to analyze the potential of rain with thunderstorms using radiosonde data, to analyze the instability indices based on parameters that obtained from Radiometer, and to analyze the trends of instability indices in 6 hours before the storm event. There are a few dates that become attention, the day where rain events with thunderstorms is high which is on January 28th-31st, 2016 and February 14th, 2016, and the rain event without thunderstorm on February 3rd-4th, 2016. The results showed that there are different sounding results before rain event and when it rains. The sounding result before rain event has moderate lability and sounding result when rain event has strong lability. In addition,  the data from the radiometer showed a significant difference between the predicted 6 hours prior to the event of rain with a thunderstorm and rain without thunderstorm events. 
IDENTIFIKASI KEKERINGAN HIDROLOGI DI DAS CITARUM HULU Zahroh, Nyayu Fatimah; Syafira, Sara Aisyah
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 16, No 1 (2015): June 2015
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (720.952 KB) | DOI: 10.29122/jstmc.v16i1.2635

Abstract

Intisari  DAS Citarum Hulu merupakan salah satu subdas yang paling berpengaruh di DAS Citarum dengan Waduk Sagulingnya. Besarnya debit yang masuk ke waduk menjadi sangat penting demi keberlangsungan kinerja waduk tersebut, misalnya untuk pembangkit listrik. Penelitian ini bertujuan untuk mengetahui karakteristik kekeringan hidrologi, relasinya dengan curah hujan, dan analisis frekuensi kejadian kekeringan hidrologi di DAS Citarum Hulu. Data dari pos duga air Nanjung digunakan dalam menentukan ambang batas kekeringan hidrologi yang kemudian diperoleh karakteristik kekeringan hidrologi. Hasil menunjukan bahwa rata-rata periode kekeringan di DAS Citarum Hulu terjadi mulai dari bulan Juni hingga Oktober. Terdapat keterlambatan antara waktu curah hujan turun dan waktu ketika debit naik akibat input dari curah hujan. Hasil analisis frekuensi menunjukan bahwa kekeringan maksimum yang terjadi pada tahun 1994 memiliki periode ulang 52 tahun dan kekeringan sering terjadi dengan durasi kurang dari 20 hari.  Abstract  Citarum Hulu is one of the most influential Citarum sub-basin with the Saguling Reservoir. The amount of discharge into the reservoir is very important for the sustainability of the reservoir's performance for power plants in example. This study aims to determine the characteristics of hydrological drought, its relationship with precipitation, and frequency analysis of hydrological drought occurrence in Citarum Hulu. Data from Nanjung post are used in determining the threshold of hydrological drought which then acquired the characteristics of hydrological drought. The results showed that the average period of drought in Citarum Hulu occurred from June to October. There is a lag between the time when rainfall drops and the time when the discharge rise due to the input of rainfall. Frequency analysis results showed that the maximum drought that occurred in 1994 had a 52-year return period and drought often occurs with a duration of less than 20 days.
Air Quality Assessment Based on Real-Time Continuous Monitoring: Particulate and Nitrogen Dioxide Concentrations in South Tangerang Ihsan, Iif Miftahul; Ma'rufatin, Anies; Zahroh, Nyayu Fatimah; Ikhsan, Iik Nurul; Suwedi, Nawa; Pratama, Reba Anindyajati; Adhi, Rizky Pratama; Handika, Rendi; Lusia, Akira; Nishihashi, Masahide; Terao, Yukio; Hashimoto, Shigeru; Nara, Hideki; Mukai, Hitoshi
Jurnal Teknologi Lingkungan Vol. 26 No. 1 (2025)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jtl.2025.2887

Abstract

The increasing concentration of PM2.5, PM10, and NO2 in urban areas will impact human health. Measuring and calculating the concentration of PM2.5, PM10, and NO2 is one of the efforts to control pollution because it can obtain information on the status or category of these air pollutants. Therefore, this study aims to analyze air quality, including PM2.5, PM10, and NO2 particulates calculated based on the Air Quality Index. Pollutant measurements are carried out continuously and in real-time for 24 hours. Pollutant measurements use a continuous dichotomous aerosol chemical speciation analyzer (ACSA-14) tool placed in the BJ Habibie Science and Technology Area, Serpong, South Tangerang. Analysis of PM2.5, PM10, and NO2 concentrations were analyzed to obtain the average daily concentration during the measurement period and the ISPU method was regulated in the Regulation of the Minister of Environment and Forestry Number 14 of 2020. During the measurement period, the daily average concentrations of PM2.5, PM10, and NO2 were 40.0 μg/m3, 60.4 μg/m3, and 37.4 μg/m3, respectively, with the highest concentrations of 170.8 μg/m3, 336.0 μg/m3, 647.5 μg/m3. The moderate and unhealthy categories dominated the results of the ISPU PM2.5 analysis during the measurement period, respectively, at 55.5% and 23.0%. The good and moderate categories dominate the ISPU PM10 and NO2 analysis results, namely 38.0% and 52.2% for PM10 and 82.5% and 7.5% for NO2, respectively.