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Journal : BUANA SAINS

STUDI POTENSI AIR BAKU DAN RANCANGAN PEMANFAATAN UNTUK KEBUTUHAN DOMESTIK DI PULAU TARAKAN Kiki Frida Sulistyani; Ery Suhartanto
BUANA SAINS Vol 10, No 2 (2010)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (175.74 KB) | DOI: 10.33366/bs.v10i2.202

Abstract

In this time in Tarakan Island availability of ill assorted water with amount of water required for society. most indicator are water of PDAM emptying into society not fluent and very society him of rainwater. Island of Tarakan have mean rainfall 4000 mm/year and 230 rain day/year. From this study result is got availability of water in Tarakan is 58.351 million m3, while the requirement of until year 2033 is equal to 37.179 million m3, so that the water balance of still surplus that is 21.172 million m3. Result of calculation of balance irrigate in every district, District of North Tarakan 17.32 million m3. District of West Tarakan -9.22 million m3, by 12 deficit month. District of Central Tarakan deficit volume -0.02 million m3 by 1 deficit month and District of East Tarakan -0.15 million m3 by 1 deficit month. District of West Tarakan need water accomodation to fulfill amount of water required, because have do not enable is again woke up by accomodation, hence the water supply of isn't it from District of North Tarakan. While for the District of Central Tarakan and East Tarakan, can isn't it from the region of each. From result of analysis potency location with AHP to get location priority scale to be woke up. Is so that obtained by plan accomplishment of amount of water required in Tarakan up to year 2033, with development 4 of dam in North Tarakan, 1 of dam in Central Tarakan and 1 of dam in East Tarakan
ANALISIS KARAKTERISTIK HIDROLOGI TERHADAP POTENSI SUMBER DAYA AIR BERDASARKAN ANALISA BMKG RCP 4.5 DI DAS SEJAHTERA, SULAWESI TENGAH Suhudi Suhudi; Kiki Frida Sulistiyani; Ratnasari Rambu Dulu Mosa
BUANA SAINS Vol 23, No 1 (2023)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v23i1.4987

Abstract

The Sejahtera River Basin is located in Sejahtera Village, Palolo District, Sigi Regency, Central Sulawesi with an area of 61,028 Ha. The watershed is one of the water resources used for rice field irrigation for the people in the area. The aimed of this study to determine the hydrological characteristics and how much reliable discharge is available in the Sejahtera Watershed for existing conditions and due to climate change. In 2003–2020 an analysis of hydrological characteristics was carried out and there was an increase in the reliable discharge of 20% or 24 l/sec caused by climate change in the Sejahtera Watershed where the rains became lighter with an increase in presentation capacity ranging from 0–10 and 11-20% with moderately increasing temperatures ranging from 0.65-0.70 and 0.71 – 0.75oC. The data used in this research is secondary data. The condition of the Prosperous Watershed is still quite good, so it needs to be maintained so that there are no changes in land use.
ANALISA DEBIT BANJIR MENGGUNAKAN METODE NAKAYASU DAN SCS (SOIL CONSEVATION SERVICES) SEBAGAI PENENTUAN TINGGI MUKA AIR DI SUNGAI SEMBAKUNG, KECAMATAN LUMBIS PANSIANGAN KABUPATEN NUNUKAN Sulistyani, Kiki Frida; Suhudi, Suhudi
BUANA SAINS Vol 24, No 1 (2024)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v24i1.6117

Abstract

This research aimed to estimate the magnitude of the flood discharge value in the Sembakung River using the Nakayasu Method and SCS (Soil Conservation Services) as a determination of water level. This study was located in the upstream Sembakung Watershed and divided into two sub-watersheds such as Labang 1 and Labang 2. The Calculation of flood discharge using the Nakayasu and SCS method was calibrated with the results of hydrometric measurements. Based on the results of hydrometric measurements, floods that often occur in the Labang Sub-watershed are at an altitude of +117 - +118 with a large discharge ranging from 633 - 828 m3 / sec. The maximum flood in the Labang sub-watershed was at an altitude of +120, with a discharge of 1,271 m3 / sec. The calculation result of the SCS method is 1,280 m3 / sec and the Nakayasu method is 3,310 m3 / sec. The closest measurement result is the SCS method. River profile calculation using HEC-RAS software, with flood discharge at Labang 1 location and downstream boundary in the form of flood discharge at Labang 2 location. The results of HEC-RAS modeling using flood discharge with a return period of 25 years in the Labang 1 Sub-DAS obtained a water level elevation of +120.89. While the results of modeling with flood discharge with a return period of 50 years are at an altitude of +122.71.