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Journal : GANEC SWARA

ANALISIS POLA SEBARAN KARAKTERISTIK IKLIM DI PULAU SUMBAWA YASA, I WAYAN; SALEHUDIN, SALEHUDIN; SAIDAH, HUMAIRO; JAYANEGARA, I DEWA GEDE; SULISTIYONO, HERI
GANEC SWARA Vol 17, No 4 (2023): Desember 2023
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v17i4.619

Abstract

Sumbawa Island is one of the largest islands in West Nusa Tenggara (NTB) Province with an area of 15,414.5 km². Climatic conditions greatly influence the economy of the people of Sumbawa Island because most of the population earns their living as farmers, planters and livestock breeders. Extreme climate changes often occur. This results in natural disasters such as floods, landslides and drought. Sumbawa Island itself often experiences floods in the rainy season and droughts in the dry season. Knowledge of climate characteristics will really help the people there, in overcoming and avoiding the impacts of extreme climate change now and in the future. This research functions to provide information regarding the climate characteristics of Sumbawa Island.The method used to analyze the climate characteristics of Sumbawa Island is the Thornthwaite and Schmidth-Fergusson climate classification methods. The data used is secondary data for 14 years (2005-2018). This data was obtained from the NT I River Basin Center and generation data using the Thomas-Fiering model for the next 10 years (2019-2028).The results of the analysis showed that according to Thornthwaite, Sumbawa Island in the 2005-2018 and 2019-2028 periods had the same climate type, namely a dry climate (E) based on an average PE index value < 16 and a tropical climate (A) based on an average TE index value. ≥ 128. According to Schmidth-Fergusson in the 2005-2018 and 2019-2028 periods, Sumbawa Island has the same 3 types of climate, namely a moderate climate (D) with a value of 0.6 ≤ Q < 1, a slightly dry climate (E) with a value of 1 ≤ Q < 1.67 and dry climate (F) with a value of 1.67 ≤ Q < 3.
PENGARUH PENETAPAN WAKTU HUJAN TERHADAP BESARNYA DEBIT BANJIR RENCANA NEGARA, I D G JAYA; WIRADARMA, LALU WIRAHMAN; YASA, I WAYAN; SAIDAH, HUMAIRO; SAADI, YUSRON; SULISTIYONO, HERI; RAI K W, I G AGUNG NGURAH
GANEC SWARA Vol 17, No 4 (2023): Desember 2023
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v17i4.628

Abstract

The aim of this study is to determine the discharge of rainwater runoff from different durations of rain, to determine the magnitude of the differences in the discharge of rainwater runoff produced, and to determine the differences in channel dimensions resulting from differences in the duration of rain used. This study uses 6 years of daily rainfall data recorded at Bengel Station, to calculate the planned flood discharge as an alternative for controlling rain runoff in the Green Asia Housing area with a land area of ±6 hectares, a test time was used with rain times selected as 24 hours and 5 hours. Flood discharge is calculated using the Rational formula with a rain return period of 2 years according to the design area. The results of data analysis will be presented in the form of tables, discussed and concluded descriptively.The results of the study show that there is indeed a quite large difference in flood discharge, where the use of a 24-hour rain period produces a planned discharge that is around 32% lower than the use of a 5-hour rain period. The dimensions of the channel produced for a discharge with a rain duration of 24 hours are also smaller than the dimensions produced by a flow discharge with a rain duration of 5 hours. The fact is that rain events with a duration of shorter than 24 hours are more common than rain events lasting a full day.
PENGUKURAN KINERJA DATA HUJAN CHIRPS DALAM PENILAIAN KEKERINGAN DI LOMBOK TENGAH SAIDAH, HUMAIRO; YASA, I WAYAN; SULISTIYONO, HERI
GANEC SWARA Vol 18, No 1 (2024): Maret 2024
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v18i1.790

Abstract

Drought index analysis requires long data requirements. However, the complete and long recording periods of rainfall data are still the main obstacles to meeting rainfall data needs. Apart from that, there are still many areas that do not have adequate and evenly distributed rain recording stations. This research aims to see if the use of CHIRPS (Climate Hazard Group Independent Precipitation with Station Data) satellite rainfall data can be used to calculate the drought index using the SPI (Standardized Precipitation Index) method. The research began with collecting rain data from ARR measurements and downloading CHIRPS satellite rain data. CHIRPS data is corrected first by reducing the correction factor using simple regression where CHIPS data is the independent variable and ARR data is the dependent variable. CHIRPS data was then corrected and used in calculating the drought index using the SPI method. The results of the SPI calculation from the corrected CHIRPS rainfall data were then compared with the drought index resulting from analysis using ARR data. The results obtained show that both CHIRPS data and ARR data produce the highest drought index with the Normal severity category. The drought index resulting from CHIRPS data analysis is stated to be quite good and corresponds to a suitability level of 60%. So the CHIRPS data is declared good and can be used for drought analysis in this region.
Co-Authors Agastya, Dewandha Mas Agus Suroso Akbar, Andi Rahman Akmaluddin Akmaluddin Andari Putri, Ni Putu Ayu Satya Anwar, Ihza Izaldi Arini, Nyoman Ayu Aryanto, Bagus Prabowo Avriliani, Salsabila Baiq Susdiana Fibrianti Budi Waluyo Budianto, M Bagus Budianto, Muh Bagus Budianto, Muh. Bagus Budiarti, Wiwin Dewi, Evrianti Syntia Eko Pradjoko EMI SALMAH Eniarti, Miko Ery Setiawan Ery setiawan Fajira, Era Fathiyyah, A.J. Fauzia, Isna Firdaus, Muhamad Arsya Maulana Frasitio, Rizal Hadi Grahestika, Ni Ketut Laksmi Hamzanwadi, Robi Hardi Pratomo Hariyadi, Hariyadi Hartana Hartana, - Hartana, Hartana Hasyim Hendrawan Hendrawan Hidayat, Ari Ramadhan Humairoh Saidah I Dewa Gede Jaya Negara I Wayan Yasa, I Wayan Jauhar Fajrin, Jauhar Jaya Negara, I Dewa Gede JAYANEGARA, I DEWA GEDE Julkifli Karyawan, I Dewa Made Alit Khakiki, Bintang Dwi Nur Khaliilulrahman, Khaliilulrahman Kosim Kusuma, Rr. Widyawati Tresna M.A. Muazar Habibi Mahendra, Made Merdana, I Nyoman Muflihah Isnawati Muhajirah Muliadi, Lalu NEGARA, I D G JAYA Niseng, Zakee Pathurahman PRACOYO, ATAS Pradjoko , Eko Prihatin, Yulianto Saputra Putra, Adeyong Wira Rahayu, Nita Agustini Rahmatun, Dwiana Aulya RAI K W, I G AGUNG NGURAH Ramdani, Nofi Rohani Salehudin, Salehudin Sari, Nopia Puspita Solihin, Muhammad Anhar Sudirman, H Suparjo Supriyadi , Anid SUPRIYADI, ANID Suryawan Murtiadi, Suryawan Taufik, Baiq Nabila Teti Zubaidah Triyani, Wiwin Akarena Utami, Fadillah Rabbiatul Veithzal Rivai Zainal Wibowo, Nazwa Rizka Wilujeng, Putri Rahayu WIRADARMA, LALU WIRAHMAN Yayuk Andayani Yuni Pantiwati Yusron Saadi Zainudin, Rahman