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All Journal Buletin GAW Bariri ( BGB)
Rheinhart Christian Hamonangan Hutauruk
Stasiun Pemantau Atmosfer Global Lore Lindu Bariri, Jl. Abdul Rahman Saleh, Kota Palu, Sulawesi Tengah, 94231
Agriculture, Biological Sciences & Forestry Astronomy Computer Science & IT Earth & Planetary Sciences Environmental Science

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Peluang bencana banjir pada saat hujan lebat dan sangat lebat di kawasan Pantura Provinsi Jawa BaratPeluang Bencana Banjir Pada Saat Hujan Lebat dan Sangat Lebat di Kawasan Pantura Provinsi Jawa Barat Dimas Yudistira; Rheinhart Christian Hamonangan Hutauruk
Buletin GAW Bariri Vol 2 No 1 (2021): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1149.549 KB) | DOI: 10.31172/bgb.v2i1.34

Abstract

West Java Province is one of the areas with the potential for flooding. This is due to the topographical characteristics of the lowlands where there are many tributaries and the high population density which increases every year, causing damage to the ecosystem. One of the factors causing flooding is rainfall that is high above normal, so that the water diversion system consisting of natural rivers and creeks as well as the existing artificial flood drainage and canal systems is unable to accommodate the accumulated rainwater so that it overflows. Many factors cause rainfall in Indonesia to be above normal, one of which is due to the influence of the El Niño South Oscillation (ENSO) in this case La Niña. Anticipation of facing heavy rainy season due to La Niña needs to be increased, in accordance with the high threat of disasters. In this study, using the Conditional Probability method to see the chance of flooding in the northern region of West Java which consists of Bekasi, Karawang, Subang and Indramayu. The data used in the study were rainfall from 9 rain posts with a time span from 1981–2010. This research resulted in a potential flood opportunity value in Karawang regency 83.33% represented by the Purwakarta rain station during heavy rains, while in Subang district it showed a flood probability value of 66.67% represented by the Wanayasa rain post during heavy rains, for Bekasi district the opportunity value The resulting flood was 83.33% which was represented by the Mt. Mas that happened when it rained heavily.
Perhitungan Neraca Air Meteorologi Waduk Jatiluhur Berdasarkan Data Curah Hujan Dan Penguapan Muhammad Asnawi; Rheinhart Christian Hamonangan Hutauruk
Buletin GAW Bariri Vol 3 No 2 (2022): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v3i2.71

Abstract

One of the causes of water reduction in reservoirs is the large evaporation caused by rainfall. Measurements of the amount of evaporation in the reservoir still need to be tested and adjusted to local conditions of the region. Hence the calculation of Jatiluhur reservoir water balance is based on precipitation data and evaporation with the aim to obtain potential evaporation formula and to know the surplus and water deficit in Jatiluhur reservoir due to climatology factor. The data used is daily rainfall data and daily evaporation data from 2003 to 2018. The research begins with grouping rainy days, no rainy days and evaporation every month. Furthermore the data is divided into several classes for the later specified frequency and maximum and minimum value of evaporation data. Then the calculation is calculated evaporation and potential lost with empirical formula based on maximum, minimum, and predefined values. The result is a large potential evaporation when the rainy day and the rainy day from January to December in Jatiluhur Reservoir is generally in the range of 3.8 to 11 mm/day, except in August and September are experiencing a significant increase. Next, the potential loss of Jatiluhur reservoirs in each month can be sought using empirical formulas with variable rainfall, evaporation when rainy day and day without rain.
Co-Authors Dimas Yudistira Muhammad Asnawi