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INDONESIA
Jurnal Sains & Teknologi Modifikasi Cuaca
Published by Badan Pengkajian dan Penerapan Teknologi
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Education
Arjuna Subject : -
Articles 566 Documents
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ANALISIS HIDROGRAF SATUAN SINTETIK METODE SNYDER, CLARK DAN SCS DENGAN MENGGUNAKAN MODEL HEC-1 DI DAS CILIWUNG HULU Nugroho, Sutopo Purwo
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 2, No 1 (2001): June 2001
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (57.542 KB) | DOI: 10.29122/jstmc.v2i1.2147

Abstract

Analisis hidrograf satuan sintetik berdasarkan metode Snyder, Clark, dan SCS pada suatu DAS dapat dilakukan dengan menggunakan model HEC-1. Model HEC-1 merupakan paket model hidrologi yang cukup terkenal yang dapat digunakan untuk mensimulasi aliran permukaan sebagai respon hujan tunggal yang terjadi pada suatu DAS. Metode SCS mempunyai Qp, Tp dan tebal DRO yang lebih besar daripada pengamatan. Sedangkan metode Snyder dan Clark, nilai Qp lebih kecil dibandingkan dengan Qp pengamatan, namun waktu puncaknya lebih besar.Synthetic unit hydrographs analysis of a watershed based on Snyder, Clark, and SCS methods can be done by utilizing HEC-1 model. The HEC-1 model is a package of hydrological model that has been adequate known to simulate runoff as a response of a rainfall event on a watershed. SCS method predicts Qp, Tp and DRO depth higher than the observations. Meanwhile, Snyder and Clark methods predict smaller Qp, but higher time of peak.
PREFACE JSTMC VOL.20 NO.2 DECEMBER 2019 : FOREWORD AND ACKNOWLEDGEMENT Wirahma, Samba
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 20, No 2 (2019): December 2019
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (87.147 KB) | DOI: 10.29122/jstmc.v20i2.4066

Abstract

DISTRIBUSI SPASIAL TINGKAT PENCEMARAN AIR DI DAS CITARUM Cahyaningsih, Andriati; Harsoyo, Budi
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 11, No 2 (2010): December 2010
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2252.269 KB) | DOI: 10.29122/jstmc.v11i2.2180

Abstract

Penelitian ini bertujuan untuk menggambarkan distribusi spasial pencemar air di DASCitarum. Studi ini menggabungkan teknologi penginderaan jauh, Sistem InformasiGeografis (GIS) dan data kualitas air. Informasi tentang DAS Citarum dikumpulkandari interpretasi Landsat TM. Kualitas air dikumpulkan dari data sekunder dari 33 titiksampel nilai BOD. Semua informasi diproses oleh GIS. Data dianalisis dan diplot kedalam peta yang menggambarkan distribusi polutan air di DAS Citarum.This study was aimed to describe spatial distribution of water pollutant at Citarumwatershed. This study combined remote sensing technology, Geographic InformationSystem (GIS) and water quality data. Information on Citarum watershed was collectedfrom Landsat TM interpretation. Water quality was collected from secondary data of 33sample point BOD values. All information was procesed by GIS. The data were analysisand plotted into a map described water pollutant distribution at Citarum watershed.
SIKLON TROPIS WASHI DAN PENGARUHNYA TERHADAP SEBARAN HUJAN DI INDONESIA Mulyana, Erwin
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 13, No 2 (2012): December 2012
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3725.04 KB) | DOI: 10.29122/jstmc.v13i2.2573

Abstract

Siklon Tropis Washi yang menghantam Pulau Mindanao FIlipina selatan pada 14 - 18 Desember 2011 merupakan siklon paling mematikan di dunia yang terjadi pada tahun 2011.
PREFACE JSTMC VOL.18 NO.2 DECEMBER 2017 : FOREWORD AND ACKNOWLEDGEMENT Wirahma, Samba
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 18, No 2 (2017): December 2017
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (100.571 KB) | DOI: 10.29122/jstmc.v18i2.2807

Abstract

PENGARUH FAKTOR IKLIM TERHADAP POLA SEBARAN INTEGRAL KONSENTRASI KONTAMINAN RADIOAKTIF TAHUNAN DARI CEROBONG REAKTOR KARTINI YOGYAKARTA KE UDARA LINGKUNGAN SEKITARNYA Mondjo, Mondjo; Sudibyakto, Sudibyakto
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 1, No 2 (2000): December 2000
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (207.867 KB) | DOI: 10.29122/jstmc.v1i2.2131

Abstract

This research is to study the impact of climate factors and environmental risk due tooperation of The Nuclear Reactor of Kartini that is proportional to the annual integratedconcentration of the radioactive contaminant into the air of surrounding areas A research has been done to design a mathematical model to relate the annual integrated concentration of the radioactive contaminant with the radioactive contaminant released from the Reactor of Kartini (the rate the effluents are released, type of the radioactive contaminant, dimension of stack), and climatological factor (wind direction, wind speed, solar radiation percentage) . The result shown that the maximum of annual integrated concentration of the radioactive contaminant of Argon-41 had been on the decrease but variation of the annual climatological factor was not significant with the distribution of it. The map of the annual integrated concentration of Argon-41 shown up the maximum of 3 the annual integrated concentration of Argon-41 was 0,6 ? Ci/m . The area where had the 3 value of the annual integrated concentration of Argon-41 of 0,4 ? 0,6 ? Ci/m (equal to the -5 3mean concentration of Argon-41 of 4,04 ? 6,06 × 10 ? Ci/m ) for the direction of 60° onthe distance of 200 ? 1075 m, the direction of 30° on the distance of 200 ? 800 m, and the direction of 90° on the distance of 300 ? 575 m. The contribution of contaminant released from the stack of the Reactor of Kartini was lower than the natural radioactivity so the operation of the Reactor of Kartini was not significant with the degree of theenvironmental radioactivity.
KONVERGENSI ATMOSFER LAPISAN BAWAH DAN HUBUNGANNYA DENGAN HUJAN EKSTRIM (STUDI KASUS: BANJIR CIREBON 15 FEBRUARI 2017) Mulyana, Erwin
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 20, No 1 (2019): June 2019
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (961.594 KB) | DOI: 10.29122/jstmc.v20i1.3943

Abstract

IntisariTelah dilakukan analisis kondisi atmosfer di berbagai lapisan ketinggian untuk melihat keterkaitannya dengan kejadian hujan ekstrim di wilayah perbatasan Jawa Barat-Jawa Tengah pada tanggal 15 Februari 2017. Area penelitian difokuskan di area 108.00-109.50 BT dan 6.50-7.50 LS yang merupakan area hujan ekstrim (AHE). Analisis sebaran dan waktu kejadian hujan menggunakan data GSMaP dengan resolusi 0.10 x 0.10 dan periode setiap satu jam, data satelit MERRA2 dengan resolusi 0.6250 x 0.50 dengan periode setiap 3 jam, data Radiosonde stasiun Cengkareng jam 07.00 dan 19.00 WIB, serta citra satelit Himawari 8. Hujan di wilayah AHE berlangsung pada jam 13.00?23.00 WIB dengan puncak hujan terjadi pada jam 18.00 WIB. Saat terjadi hujan ekstrim, terdapat perlambatan angin baratan di wilayah AHE serta adanya pertemuan angin dari utara dan dari selatan di wilayah tersebut. Area AHE merupakan area dengan konvergensi kuat pada level ketinggian 925 mb dan 850 mb, sebaliknya terjadi divergensi pada level ketinggian 700 mb dan 500 mb. Data Radiosonde menunjukkan kelembapan udara dari permukaan hingga lapisan 400 mb umumnya lebih dari 80%. Freezing level pada jam 07.00 WIB terdapat di level 571 mb (4.622 m) dan pada jam 19.00 WIB terdapat di level 585 mb (4.820 m).  AbstractHave been analyzed of the atmospheric conditions at various altitudes in its relationship with extreme rainfall over West Java-Central Java border area on February 15th, 2017. The study area is focused on the 108.00-109.50 East and 6.50-7.50 South, which is the extreme rainfall area (AHE). The data used in this study are GSMaP hourly rainfall (0.10 x 0.10), MERRA2 satellite three-hourly data (0.6250 x 0.50), Cengkareng Radiosonde data at 07.00 LT and 19.00 LT, and Himawari 8 Satellite imagery. The rainfall in the AHE area occurred at 13.00?23.00 LT, with the peak rainfall, occurred at 18.00 LT. The lower atmospheric westerly wind became slower over the AHE area, while the northerly and southerly wind converged at this area. The AHE area has a strong convergence at level 925 mb, and 850 mb, conversely divergence occurred at level 700 mb and 500 mb. The Radiosonde data shows that the air humidity is generally more than 80% from the surface to 400 mb. The freezing level at 07.00 LT found at 571 mb (4,622 m) while at 19.00 LT found at 585 mb (4,820 m).
ANALISIS UPPER AIR MELALUI EKSPANSI DATA PERMUKAAN KE LEVEL 850 MB, 700 MB, DAN 500 MB Haryanto, Untung
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 3, No 2 (2002): December 2002
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (129.382 KB) | DOI: 10.29122/jstmc.v3i2.2171

Abstract

Telah dilakukan analisis kondisi atmosfer Jakarta dengan menggunakan data permukaanyang diekspansi ke level mandatori 850, 700, dan 500 mb. Didapatkan bahwa hujandengan tebal lebih dari 10 mm terjadi jika atmosfer MR700 bernilai lebih dari 6 gr/kgr, dan suhu pada level mandatori 700 mb lebih hangat dari 11 C, dan perubahan tekanan udaratidak memberi petunjuk karena variasinya kecil. Hasil ini mungkin dapat digunakan sebagaibagian sistem peringatan banjir akibat hujan lebat.Analysis atmospheric around Jakarta was carried out by expansion of surface measurement data to the three mandatory levels of 850, 700, and 500 mb. Analysis result found that heavy rainfall more than 10 mm per day occured if MR700 equal or more than 6 gr/kgr, and temperature at 700 mb mandatory level more than 11 C, and no indication from pressure changes due to no variation. Result might used as flood warning due to heavyrain.
APPENDIX JSTMC VOL.17 NO.1 JUNE 2016 : AUTHOR INDEX & KEYWORD INDEX Wirahma, Samba
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 17, No 1 (2016): June 2016
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (151.272 KB) | DOI: 10.29122/jstmc.v17i1.2802

Abstract

KARAKTERISTIK TEMPORAL DAN SPASIAL CURAH HUJAN PENYEBAB BANJIR DI WILAYAH DKI JAKARTA DAN SEKITARNYA Prabawadhani, Destianingrum Ratna; Harsoyo, Budi; Seto, Tri Handoko; Prayoga, Bayu Rizky
Jurnal Sains & Teknologi Modifikasi Cuaca Vol 17, No 1 (2016): June 2016
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (209.079 KB) | DOI: 10.29122/jstmc.v17i1.957

Abstract

IntisariCurah hujan merupakan faktor utama penyebab banjir, tidak terkecuali banjir di wilayah DKI Jakarta. Oleh karena itu, karakteristik curah hujan perlu dipelajari untuk tujuan mitigasi bencana banjir di wilayah Ibukota. Kegiatan riset IOP (Intensive Observation Period) yang telah dilaksanakan oleh BPPT dan BMKG pada tanggal 18 Januari 2016 hingga 16 Februari 2016 bertujuan untuk mengetahui karakteristik atmosfer yang menyebabkan cuaca ekstrim di sekitar wilayah DKI Jakarta. Tulisan ini secara lebih spesifik membahas karakteristik curah hujan dari data satelit TRMM JAXA (Tropical Rainfall Measuring Mission) di Wilayah DKI Jakarta dan sekitarnya, untuk mengetahui bagaimana distribusinya baik secara temporal maupun spasial. Dari hasil pengamatan selama periode kegiatan IOP dapat diketahui bahwa secara temporal distribusi curah hujan yang memiliki intensitas tinggi terjadi pada siang hari (mulai pukul 13.00 WIB) hingga malam hari (pukul 24.00 WIB) dengan intensitas tertinggi terjadi pada rentang waktu antara pukul 13.00 sampai dengan 18.00 WIB. Secara spasial total hujan tertinggi selama periode IOP terpusat di daerah sekitar perbatasan antara Provinsi DKI Jakarta (Jakarta Selatan), Provinsi Jawa Barat (Depok), dan Provinsi Banten (Kota Tangerang Selatan) dengan total curah hujan berkisar antara 600 mm hingga lebih dari 650 mm. Suplai utama curah hujan terbesar adalah hujan-hujan yang terjadi di daerah Selatan hingga bagian tengah Provinsi DKI Jakarta.  Abstract Rainfall is a major factor causing flooding, no exception flooding in Jakarta. Therefore, precipitation characteristics need to be studied for the purpose of flood mitigation in the Capital region. Research activities IOP (Intensive Observation Period) have been conducted by BPPT and BMKG on January 18, 2016 until February 16, 2016 aims to determine the characteristics of the atmosphere that causes extreme weather around Jakarta. This paper more specifically discusses the characteristics of rainfall from satellite data TRMM JAXA (Tropical Rainfall Measuring Mission) in the Jakarta area and its surroundings, to know how they were distributed both temporally and spatially. From observations during IOP periods can be seen that the temporal distribution of rainfall high intensity of rain that has occurred during the day (starting at 13.00 pm) until late at night (24.00 pm) with the highest intensity occurred in the period between 13.00 until 18.00. Spatially the highest total of rainfall during the IOP is concentrated in the area around the border between Jakarta (South Jakarta), West Java (Depok), and Banten (South Tangerang City) with total rainfall 600?650 mm. The main supply of the heaviest rainfall was the rain that occurred in the South until the middle part of Jakarta. 

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