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Journal : GANEC SWARA

ANALISIS BESAR KOEFISIEN GESEKAN DAN ANGKA REYNOLDS TERHADAP VARIASI KEMIRINGAN PIPA TRANSMISI JARINGAN IRIGASI TETES PVC DRIPLINE I D G JAYA NEGARA; HUMAIRO SAIDAH; FITRAH RIZAL DWIASMORO; ANID SUPRIYADI; LILIK HANIFAH
GANEC SWARA Vol 15, No 2 (2021): September 2021
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v15i2.218

Abstract

Farming with drip irrigation systems on sloping dry land is very rarely found at the field level, so that many dry lands are rarely used by the community. To be able to support the application of drip irrigation on sloping land, it is necessary to test the effect of slope variations on the flow characteristics of the drip irrigation system. This study aims to determine the effect of variations in the slope of the transmission pipe, which describes the slope of the land, on the Reynolds number (Re) and the pipe friction coefficient (f) generated in the drip irrigation network. The test drip irrigation network was made of 4 PVC pipes with a distance of 80 cm between the pipes, the drip hole distance of 60 cm and a diameter of 0.5 mm. The test variations are the slope of the transmission pipe 10 °, 20 °, 30 °, 40 ° and the water depth above the outlet tower h1 = 20cm, h2 = 30cm and h3 = 40cm with various head heights. Research using a water source from a tower with a capacity of ± 200 liters with a height of 3.3 m, a transmission line of PVC pipe Ø1 / 2 inches long 3.35 m.The results showed that the Re value will be greater from drip pipe 1 to drip pipe 4. The range of Re values from 1 to pipe 4 is 195 to 992 which is classified as laminar. The amount of friction coefficient f obtained decreases from drip pipe 1 to drip pipe 4, with a value of 0.327 to 0.064.
ANALISIS KEBUTUHAN AIR TANAMAN DENGAN METODE CAOLI PADA TANAMAN TOMAT DENGAN IRIGASI TETES DI LAHAN KERING LOMBOK UTARA I DEWA GEDE JAYA NEGARA; M. BAGUS BUDIANTO; ANID SUPRIYADI; HUMAIRO SAIDAH
GANEC SWARA Vol 14, No 1 (2020): Maret 2020
Publisher : Universitas Mahasaraswati Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (368.538 KB) | DOI: 10.35327/gara.v14i1.116

Abstract

Tomato farming in the dry land of Salut Village, North Lombok is very often done by farmers, because the plants are short-lived and the selling price of the harvest is quite stable. However, the development of tomato plants in this region is still constrained by the high demand for plant water (KAT), because there are not many references. For this reason, this study aims to determine the amount of water needed for tomato planting and other parameters for each growth phase (f). The study is conducted on a land measuring 7m x 28 m, the size of the beds around 0.75 m x 28 m, the source of water from a tank with a capacity of 1600m3 and drip irrigation for crop irrigation. KBT analysis used a formula (Caoli, 1967), with analysis data from field data when planting tomatoes, so the results of the study are expected to be more realistic to address these obstacles in the development of tomato plants in the district of North Lombok. KAT analysis results with the Caolli formula show, for once irrigation in the initial phase (f1) around 0.738 m3, the active vegetative phase (f2) around 1.667 m3 and the fertilization phase until maturation of the initial fruit (f3) around 3.087 m3. The amount of soil moisture (w) additional irrigation in each phase is for f1 around 4% -5%, f2 around 6.5% -12% and f3 around 12% -17%. The duration of drip irrigation by 40 minutes needs to be shortened in phase f1, for phase f2 the duration is sufficient, and in phase f3 the duration needs to be added by more than 40 minutes or the irrigation schedule is shortened to less than 4.
PERBANDINGAN BEBERAPA METODE PERHITUNGAN DEBIT PUNCAK BANJIR RANCANGAN HUMAIRO SAIDAH; ATAS PRACOYO; KHAIRUDIN KHAIRUDIN
GANEC SWARA Vol 14, No 1 (2020): Maret 2020
Publisher : Universitas Mahasaraswati Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (773.767 KB) | DOI: 10.35327/gara.v14i1.130

Abstract

Peak discharge flood analysis is very crucial in waterworks design. The proper design flood discharge will produce effective construction dimensions as project requirement. Therefore, flood design calculations must be analyzed using appropriate methods. The problem in estimating design flood discharge is usually found in ungauged watersheds which do not have any water discharge measuring equipment.This study wants to test the flood design method using rain data input to be applied to the Babak River, so the result can be used as a guide in the selection of flood discharge calculation techniques in other ungauged watersheds.The accuracy test is carried out by comparing the results of these methods with the flood design resulted from a frequency analysis of the Annual Maximum Series. Based on the results of the calculation, the peak flood of the Harpers method has the smallest RE and RMSEP values are 8.960% and 88.546 respectively. Thus, it can be concluded that the calculation of the design of the flood peak Haspers method has the best accuracy of the analysis results when compared with the Melchior and Weduwen methods for Babak River.
ANALISIS KEMAMPUAN SISTEM IRIGASI TETES BERTINGKAT DALAM PEMBERIAN LENGAS TANAH PADA POLYBAG I DEWA GEDE JAYA NEGARA; HUMAIROH SAIDAH; I WAYAN YASA; LILIK HANIFAH; DIANA PUSPITA DEWI
GANEC SWARA Vol 16, No 2 (2022): September 2022
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v16i2.326

Abstract

In increasing the supply of food in residential areas, it is necessary to encourage the use of land and water sources in the yard even though the land area is limited. The design of multilevel drip irrigation may be an option in these housings, and therefore it is necessary to test and determine the ability of the irrigation to discharge, uniformity and soil moisture produced. This study aims to determine the effect of using inch PVC pipe as a secondary network on discharge, uniformity (CU) and soil moisture (w) in a multilevel drip irrigation system. Experiments were carried out with a 150 liter reservoir water source 3 m high, soil moisture test with a test duration of 5 minutes, 10 minutes and 15 minutes. Data analysis was carried out on discharge data (Q), irrigation volume and soil moisture. The research results are presented in tables, graphs and concluded descriptively. The results showed that the secondary pipe flow rate was Q1 822.54 cm3/sec, Q2 107.47 cm3/sec and Q3 15.39 cm3/sec. Irrigation uniformity in TSK irrigation operations obtained CU of 72.67% and in SK obtained CU of about 51.49% to 89.34%. Soil moisture produced at a duration of 5 minutes, 10 minutes and 15 minutes with an initial soil moisture condition range of 14%-28%, the results on the 1st floor (w1) ranged from 41%-50%, for the second floor w2 it was around 31%-45 % and on the third floor w3 around 25%-40%
ANALISIS PENGARUH METODE SRI DAN KONVENSIONAL TERHADAP LUAS LAYANAN IRIGASI PADA BENDUNGAN MENINTING MUH BAGUS BUDIANTO; HUMAIRO SAIDAH
GANEC SWARA Vol 17, No 1 (2023): Maret 2023
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v17i1.375

Abstract

The biggest water demand is in the agricultural sector. This great need is caused by the irrigation system with continuous inundation (conventional). One of the water-saving irrigation methods is the System of Rice Intensification (SRI) method. The SRI method of giving water is done intermittently. One of the obstacles to the application of the SRI method is a continuous water source. The dam is one of the water sources whose water availability is relatively easy to manage, making it suitable for irrigation applications using the SRI method. This study aims to analyze the provision of irrigation water for SRI and conventional systems at the Meninting Dam and its effect on the area of irrigation services. In this study, an analysis of water availability was carried out using awlr data, an analysis of irrigation water requirements using the conventional method and the SRI method. Reservoir simulation analysis is used to determine the area that can be irrigated, planting intensity and reservoir reliability. The results for the conventional method of irrigated area that can be served are 1,559 ha with a planting intensity of 300% and a reservoir reliability of 95.83%. At the same intensity and reliability as the conventional method, the SRI method can irrigate 1,980 ha of irrigation area, so using the SRI method can increase the service area by 421 ha or can increase the service area by 27%.
POLA DISTRIBUSI HUJAN DAN PENGARUHNYA TERHADAP PENYIMPANGAN HIDROGRAF BANJIR DAS JANGKOK HUMAIRO SAIDAH; M. BAGUS BUDIANTO; I WAYAN YASA; ERY SETIAWAN
GANEC SWARA Vol 17, No 1 (2023): Maret 2023
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v17i1.397

Abstract

Determining the rain pattern distribution is believed to affect the design flood. Providing hourly rainfall observations can be obtained, and the distribution patterns can be determined. However, in areas that do not have one, flood discharge calculations are carried out by distributing daily rainfall using empirical methods. This study distributes daily rainfall into hourly rainfall in the Jangkok watershed using ABM and Mononobe methods and calculates the flood hydrograph using the Nakayasu model. The synthetic unit hydrograph obtained from the actual rain distribution is then compared with the unit hydrograph generated from the empirical distribution, then the deviation is measured. The results showed that the Mononobe and ABM rain distribution gave the same hydrograph shape as the observation one, only for 2 hours of rain duration. As long as the rain lasts 3-6 hours, the peak flood discharge (Qp) tends to be lower, 7-20% for Mononobe and  2-7% for ABM. Then the Qp becomes overestimated (5-12%) for a rain duration of >6 hours. Mononobe gives the same flood peak time (Tp) as observation rain for 1-5 hours rain duration and becomes 1 hour earlier for >6 hours. In contrast, ABM produces peak times 1 hour longer than hydrographs with observation rain. Generally, the two methods provide a more significant hydrograph deviation for a longer duration of rain.
SEBARAN KEKERINGAN HIDROLOGI BERDASARKAN DEBIT ALIRAN DI KABUPATEN BIMA I WAYAN YASA; AGUSTONO SETIAWAN; I DEWA GEDE JAYA NEGARA; HUMAIRO SAIDAH; ANNISA HUMAYRA DIRGANTARA
GANEC SWARA Vol 17, No 1 (2023): Maret 2023
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v17i1.371

Abstract

A phenomenon that often occurs in Indonesia which is also an annual disaster that hit several areas is drought. Drought is a condition in which an area, land, or community experiences a shortage of water so that it cannot meet their needs. Drought can be caused because an area does not experience rain or is dry for a long period of time or the rainfall is below normal, so that the water content in the soil is reduced or even non-existent. The areas to be analyzed are the Hidirasa watershed, the Rontu watershed, and the Jangka watershed in Bima Regency, West Nusa Tenggara. The analysis drought  aims to determine the deficit, drought duration, drought criteria based on deficits and surpluses that occur by analogy to Oldeman's criteria, hydrological drought index analysis, and hydrological drought distribution maps. In this study, data were used for the Tawali watershed in the Hidirasa watershed, the Sari watershed for the Jangka and the Kumbe water for the Rontu watershed to determine the Q50 and Q80 thresholds using the method Flow Duration Curve (FDC) to obtain hydrological drought characteristics. In the analysis of hydrological drought in several watersheds in Bima Regency, the results show that the maximum deficit in the Hidirasa, Term and Rontu watersheds was 1.09 m³/s, 0.14 m³/s, 0.49 m³/s which occurred in 2001, 1995, and 2001. From the deficit, it was found that the average drought period occurred 8-9 months from May to December and even some until January which indicated that the drought criteria were in zone 2 according to Oldeman. The largest hydrological drought index is the Hidirasa watershed, the Jangka Watershed and the Rontu watershed, respectively, -0.45, -1.00, -1.00, with a very strong drought category.
APLIKASI METODE RUN UNTUK PEMANTAUAN KEKERINGAN METEOROLOGIS DI KECAMATAN PUJUT KABUPATEN LOMBOK TENGAH HUMAIRO SAIDAH; AGUSTONO SETIAWAN; MUH. BAGUS BUDIANTO
GANEC SWARA Vol 18, No 2 (2024): Juni 2024
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v18i2.905

Abstract

Drought is a disaster frequently experienced in Pujut District, Central Lombok Regency. Almost every year, this area suffers from prolonged drought. This study was conducted to understand the characteristics of the droughts that occur, using a widely recognized drought assessment method as an effort to mitigate drought disasters in this region. The drought assessment used in this study is the Run method. This method was chosen due to its simplicity and the fact that it only requires rainfall data for its analysis. The results of the calculations for the depth and duration of the drought period are then compared with past droughts in the region and the natural phenomena that influenced them. The analysis using the Run method shows that the most severe and longest drought occurred at Pujut District from July 1997 to May 1998 (11 months) with a deficit of 800 mm from the average normal rainfall, and from 2014 to 2015 with a deficit of 553.54 mm. Both extreme droughts in 1997 and 2015 occurred in various regions of Indonesia and were related to the strong El Niño phenomenon occurred at that time
PEMANFAATAN DATA HUJAN BERBASIS SATELIT CHIRPS UNTUK PEMETAAN HUJAN RANCANGAN DI KABUPATEN LOMBOK UTARA SAIDAH, HUMAIRO; WIRADHARMA, LALU WIRAHMAN; SUPRIYADI, ANID; KAMTIKA, MIA JULIA
GANEC SWARA Vol 18, No 3 (2024): September 2024
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v18i3.1032

Abstract

The design rainfall value is a critical parameter in flood analysis and water structure design. In general, the design rainfall calculation uses measured rainfall data. However, sometimes it is difficult to find complete rainfall data from evenly distributed rainfall stations and in an extended measurement range. This study aims to test the use of CHIRPS satellite-based rainfall data as an alternative solution for providing data in areas with difficulty with rainfall data. The analysis includes data accuracy and calibration evaluation, followed by design rainfall analysis with frequency analysis and mapping using spatial data processing software. The accuracy test results obtained an average deviation value of the original CHIRPS that did not meet the average NSE value of 0.346. Furthermore, the data was calibrated using the regression method, and corrected data was obtained with an NSE of 0.446 with an interpretation of the meeting. A rainfall analysis was conducted for corrected CHIRPS with ARR (Automatic Rainfall Recorder) measurement as a control. The results obtained the average percentage deviation for design rainfall with a return period of 2, 5, 10, 25, 50, and 100 years using corrected CHIRPS ranging from 18 - 28% lower than design rainfall using ARR. The design rainfall isohyet map using spatial data processing software for the North Lombok Region shows that high design rainfall occurs in the eastern part of North Lombok, namely around the Santong and Sambik Bangkol stations, while design rainfall with low values is in the western part of North Lombok, namely around the Tanjung and Gunungsari stations.
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.
Co-Authors - - Akmaluddin Abdi Fadillah Adhitya Halim .P Agastya, Dewandha Mas Agung Budi Muljono Agus Soroso Agus Suroso Agus Suroso Agus Suroso Agus Suroso Agus Suroso AGUSTONO SETIAWAN Agustono Setiawan Aini, Rohadatul Akbari, Gilang Zulfa Akmaludin Akmaludin, Akmaludin Alawiyah, Tutik Ali, Ahmad Muhammad Ali, AM Alit, I Dewa Made Anid Supriyadi Anid Supriyadi ANID SUPRIYADI ANID SUPRIYADI Anid Supriyadi Anid Supriyadi ANNISA HUMAYRA DIRGANTARA Aprilestari, Nadia Ardhanareswari, Putu Diah Atas Pracoyo ATAS PRACOYO Aulani, Haniatul Azizah, Fitri Azizah, Hayatul Bakti, Lalu Arifin Aria Bambang Hariyanto Bawu, Mario Alfredo Budianto, M Bagus BUDIANTO, M. BAGUS Budianto, Muh Bagus Budianto, Muh. Bagus Desi Widianty Desi Widiyanti Dewandha Mas Agastya Dewandha Mas Agastya DEWANDHA MAS AGASTYA DHARMA S, BAGUS WIDHI DIANA PUSPITA DEWI Didi Supriyadi Agustawijaya Didik Agusta Wijaya Eko Pradjoko Eniarti, Miko Ery setiawan Ery Setiawan Ery Setiawan ERY SETIAWAN Faeruzza Athiya Farhan, Agil Fera Fitri Salsabila Firdaus FITRAH RIZAL DWIASMORO Hanesfa, Hafiz Rahman Hanifah, Lilik Hardiyanti, Ernita Hartana Hartana, Hartana Hasim Hasyim Hasyim Hasyim hasyim, hasyim Hendri Hermawan Heri Sulistiyono Heri Sulistiyono Heri Sulistiyono Heri Sulistiyono Heri Sulistiyono, Heri Heri Sulistyono Heri Sulistyono Hidayat, Syamsul Hijriati, Awwalus Sanatil I D G Jaya Negara I D G JAYA NEGARA I DEWA GEDE JAYA NEGARA I DEWA GEDE JAYA NEGARA I DEWA GEDE JAYA NEGARA I Dewa Gede Jaya Negara I Dewa Gede Jaya Negara I Dewa Gede Jaya Negara I Dewa Gede Jayanegara I DEWA GEDE JAYANEGARA I Dewa Jayanegara I Kade Wiratama I Wayan Suteja I Wayan Yasa I Wayan Yasa I Wayan Yasa I Wayan Yasa, I Wayan I.D.G Jayanegara IAO Suwati Sideman Ida Ayu Oka Suwati Sideman Ida Ayu Sri Adnyani IDG Jaya Negara Imani, Nuansa Putty Irawan, Almira Ursula Irwan Irwan Isnaniar Jauhar - Fajrin Jauhar Fajrin, Jauhar Jaya Negara, I Dewa Gede JAYANEGARA, I DEWA GEDE Junaidin, Junaidin KAMTIKA, MIA JULIA Karyawan, Dewa Made Alit Karyawan, I Dewa Made Alit Kencana, Ida Bagus Adi KHAIRUDIN KHAIRUDIN Khalil, Lutfhi Riza Kusuma, Lalu Dea Maulana Diendy Lalu Dwiki Axela Andriawan Lalu Wirahman Lalu Wirahman Wiradarma Lia Hidayaturrohmi Lilik - Hanifah Lilik Hanifah Lilik Hanifah Lilik Hanifah Lilik Hanifah LILIK HANIFAH Lilik Hanifah Lilik Hanifah Lilik Hanifah Lilik Hanifah M Bagus Budianto M Bagus Budianto M. BAGUS BUDIANTO M. BAGUS BUDIANTO Made Mahendra Mahendra, Made Merdana, I Nyoman Muh Bagus Budianto Muh Bagus Budianto MUH BAGUS BUDIANTO Muh Syahid Muh. Bagus Budianto MUH. BAGUS BUDIANTO Muh. Bagus Budianto Muh. Bagus Budianto Muhajirah Muhammad Bagus Budianto N. Nurchayati Natalia, Elya Natsir, Abdul NEGARA, I D G JAYA Negara, I Dewa Jaya Negara, IDG Jaya Niam, Siti Nur Dian Nufalia Hidayati Nugroho, Riko Salim Nur Chayati Nurrachman PRACOYO, ATAS Purwangsa, Herdi Putra, I Ketut Perdana Putra, IB Giri Putra, Rizki Pradana Qarina, Husnul RAI K W, I G AGUNG NGURAH Ratna Yuniarti Ratna Yuniarti Ratna Yuniati Rohani Rohani Rohani Rohani Rostihanji rosyadi, gusman Saiful Anwar Salehuddin Salehuddin Salehuddin Salehuddin, Salehuddin Salehudin Salehudin Salehudin Salehudin, Salehudin Salsabila, Fera Fitri Salsabila, Zelvia Seniari, Ni Made Shofia Rawiana Shofia Rawiana Sideman, IAO Suwati Sofia - Rawiana Srikus Saptaningtyas, Rini Sulistyono, Heri Suparjo Suparjo Suparjo Supriadi, Anid SUPRIYADI, ANID Supriyatna Suyasa, I K Agus Teti Handayani Tri Rachmanto Tri Rachmanto Tri Rachmanto Veithzal Rivai Zainal Waiduri, Siti Zuhara Faradisa Wardana, I G A N K Widyasari, Ni Made Cahya Devi WIRADARMA, LALU WIRAHMAN WIRADHARMA, LALU WIRAHMAN Wirahman, Lalu Yuli Yani, Puji Rizki Yuniati, Ratna Yusron Saadi Zamharia, Martiana