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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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ANALYSIS OF METEOROLOGICAL DROUGHT PROPAGATION TOWARDS HYDROLOGICAL DROUGHT IN THE UPPER BRANTAS WATERSHED, EAST JAVA Samba Wirahma; I Putu Santikayasa; Muh Taufik; Findy Renggono
Jurnal Sains & Teknologi Modifikasi Cuaca Vol. 23 No. 2 (2022): December 2022
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jstmc.v23i2.5406

Abstract

Abstract Drought is defined as a water deficit condition from normal conditions in the hydrological system. Hydrological drought is a complex process that is preceded by a rainfall deficit. Unlike many other natural disasters, droughts develop slowly, making it difficult to pinpoint the beginning and end of a drought event. Research that focuses on studying the propagation of meteorological drought to hydrological drought is fundamental to revealing the processes and mechanisms of drought propagation. Drought propagation describes the change of meteorological drought signal into hydrological drought through the hydrological cycle. This study aims to analyze the characteristics of drought and evaluate the propagation of drought in the Upper Brantas watershed of East Java. This study uses the Standardized Precipitation Index (SPI) and Standardized Streamflow Index (SSI) methods with an accumulated time of 1, 3, 6, and 12 months to analyze meteorological and hydrological drought characteristics, while the drought propagation was analyzed using Pearson correlation. The results showed that the duration and severity of drought increased with the increase in the period of accumulation of SPI and SSI, while the number of drought events was inversely proportional to the period of accumulation of SPI and SSI. The severity of hydrological drought is higher than the severity of meteorological. The worst hydrological drought (SSI1 = -22.9) with a duration of 12 months occurred in 1997-1998. The high correlation in the condition that there is no time lapse between SSI and SPI shows that the meteorological drought indicator with SPI has the potential to be used as an early detection tool for hydrological drought in the Upper Brantas watershed. This research can be the first step to developing a hydrological drought early detection technique that is very useful in water resource management in watersheds for hydropower operations.
KAJIAN KELAYAKAN DANAU RAWAPENING SEBAGAI DAERAH TARGET PELAKSANAAN TEKNOLOGI MODIFIKASI CUACA Ari Nugroho; M. Djazim Syaifullah; Halda Aditya Belgaman; Purnomo Arif Abdillah
Jurnal Sains & Teknologi Modifikasi Cuaca Vol. 23 No. 2 (2022): December 2022
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jstmc.v23i2.5489

Abstract

Intisari Kajian kelayakan pelaksanaan Teknologi Modifikasi Cuaca telah dilakukan di Danau Rawapening. Analisis yang dilakukan untuk melihat kelayakan pelaksanaan teknologi modifikasi cuaca adalah analisis hidrologis, analisis meteorologis dan analisis morfologi. Dari hasil analisis kajian tinggi muka air (TMA), terlihat nilai tertinggi terjadi pada bulan Maret–April dengan nilai tertinggi 462.49 mdpl, sedangkan TMA terendah terjadi pada bulan September–Oktober nilai terendah 460.89 mdpl. Pola hujan di wilayah DAS Rawapening memiliki tipe pola hujan monsoonal dengan puncak musim hujan pada bulan Desember-April sedangkan puncak satu musim kering pada bulan Juni-Oktober. Pola pergerakan angin di daerah Rawapening didominasi oleh angin timuran pada bulan Desember-Maret, dan baratan ketika periode April–September. Secara topografi wilayah ini merupakan daerah yang dikelilingi pegunungan dan dataran tinggi yang merupakan daerah pertumbuhan awan orografis sehingga dapat dijadikan sebagai awan target pelaksanaan TMC metode GBG (Ground Based Generator). Dengan memperhatikan aspek morfologi, topografi, hidrologi serta historis curah hujannya, DAS Danau Rawapening layak untuk dilaksanakan operasi Teknologi Modifikasi Cuaca. Pelaksanaan TMC dengan menggunakan pesawat lebih optimal apabila dilaksanakan pada bulan April–Mei atau Oktober–November setiap tahunnya. Mengingat DAS Danau Rawapening yang relatif kecil dan topografi yang mengelilingi relatif tinggi, maka dari dua parameter tersebut ada peluang pelaksanaan TMC di DAS Danau Rawapening dengan opsi menggunakan Ground Based Generator (GBG).   Abstract  A Feasibility Study of the implementation of Weather Modification technology has been carried out at Lake Rawapening. This study includes hydrology, meteorology, and morphological analysis. From the water level analysis, it can be seen the highest water level value is 462.49 masl which occurred in March-April, while the lowest water level value is 460.89 masl which occurred in September-October. The rain pattern in the Rawapening watershed has a monsoonal rain pattern with the peak of the rainy season from December to April while the peak of the dry season is from June to October. From the wind analysis, the Rawapening area is dominated by Easterly wind during December–March, and Westerly during April–September. Lake Rawapening is mostly surrounded by mountains and highlands, which are orographic cloud growth areas, so it can be used as a target cloud for implementing Weather modification technology with the Ground-Based Generator (GBG) method. By taking into account the morphological, topographical, hydrological, and historical aspects of rainfall, the Lake Rawapening watershed is suitable for Weather Modification Technology operations. The implementation of Weather Modification using aircraft is more optimal if it is carried out in April-May or October-November every year. Considering the relatively small size of the Lake Rawapening watershed and the relatively high surrounding topography, from these two parameters there is an opportunity for the implementation of Weather Modification in the Lake Rawapening watershed with the option of using GBG(s).
SUAR MODIFIKASI CUACA CoSAT 1000 AMAN TERHADAP STATUS MUTU AIR DANAU TOBA, SUMATERA UTARA: TINJAUAN STATUS MUTU AIR PADA PELAKSANAAN MODIFIKASI CUACA BERBASIS SUAR CoSAT-1000 DI DAERAH TANGKAPAN AIR DANAU TOBA Dwipa Soehoed; Satyo Nuryanto; Ardila Yananto
Jurnal Sains & Teknologi Modifikasi Cuaca Vol. 23 No. 2 (2022): December 2022
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jstmc.v23i2.5538

Abstract

Implementing Weather Modification Technology (TMC) using hygroscopic flare, which has chemical compounds Sodium Chloride as a hygroscopic seeding material, Potassium, Magnesium, etc., has been applied several times in TMC operations. For the first time, the hygroscopic flare was made by PT. Pindad, called  Cloud Seeding Agent Tube 1000 (CoSAT 1000), has been used on TMC operation in Lake Toba Catchment Area to overcome Lake Toba's water deficit in 2021. To find out the impact that might be caused by the use of the CoSAT 1000, an analysis of the water parameter and quality has been carried out from samples of rainfall, river, and lake in the period before, during, and after the implementation of TMC activities. Based on the criteria for water quality standard requirements in Government Regulation number 22 of 2021 and Minister of Environment Guidelines for Determining Water Quality Status number 115 of 2003, the results obtained from the quality parameter test and water quality status that were taken have met the class 1 and 2 water quality standards, as well as with class A water quality status. It is concluded that the use of CoSAT-1000 flare seedlings in TMC operations does not have any negative impact on water quality status.
SISTEM PENYEMAIAN AWAN DARI DARAT DENGAN DRONE MENGGUNAKAN BAHAN SEMAI 2-5 MICROMETER Tarida Simanjuntak; Purwadi Purwadi; Dr. Halda Aditya Belgaman, S.Si, M.S.M; Findy Renggono; Muhamad Djazim Syaifullah; Krisna Adhitya; M Fadhlan Thalib; M. Ikhwan Abdurrahman; Ryan Pramana
Jurnal Sains & Teknologi Modifikasi Cuaca Vol. 23 No. 2 (2022): December 2022
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jstmc.v23i2.5610

Abstract

Kelangkaan awan pada saat musim transisi menyebabkan penggunaan pesawat terbang untuk kegiatan modifikasi cuaca menjadi tidak efisien, sedangkan penyemaian awan dari darat sangat terbatas wilayahnya bergantung dari posisi menara Ground Based Generator (GBG) dibangun. Perbaikan sistem penyemaian awan dari darat telah dilakukan dengan menggunakan drone pertanian yang dimodifikasi. Dengan menambahkan sistem penyemburan pada tangki yang telah tersedia, drone dapat digunakan untuk menyemai awan menggunakan bahan semai serbuk berukuran 2-5 mikrometer. Drone akan dioperasikan di wilayah pegunungan dengan menyasar pada awan-awan orografis. Hasil studi explorasi menunjukkan bahwa Drone Agras MG 1 P memenuhi spesifikasi yang dibutuhkan dengan penambahan sistem pengeluaran bahan semai serbuk. Uji sistem penyemaian menunjukkan bahwa bahan semai dapat menyembur keluar sampai ~1,4 meter dari ujung cerobong
Preface JSTMC Vol. 23 No. 2 December 2022: Foreword and Acknowledgement Vol. 23 No. 2 December 2022
Jurnal Sains & Teknologi Modifikasi Cuaca Vol. 23 No. 2 (2022): December 2022
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Appendix JSTMC Vol. 23 No.2 December 2022: Author Index & Keyword Index Vol. 23 No.2 December 2022
Jurnal Sains & Teknologi Modifikasi Cuaca Vol. 23 No. 2 (2022): December 2022
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

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