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I DEWA GEDE JAYA NEGARA
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 1 
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.
Kemampuan Penyerapan dan Reduksi Lengas Tanah Pada Media Polybag Kombinasi Tanah dan Kompos: Soil Moisture Absorption dnd Reduction Capability In Polybag Media Combination of Soil and Compost I Dewa Gede Jaya Negara; Salehudin Salehudin; Suparjo Suparjo; Anid Supriyadi; Humairo Saidah; Lalu Dwiki Axela Andriawan
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 9 No. 2 (2023): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v9i2.447

Abstract

Soil moisture is an important factor needed by plants for growth, and therefore the amount of soil moisture that can be stored depends on the type of soil or the composition of the soil-forming materials. Compost is one of the nutrients that is often used in the manufacture of planting media on land in the form of polybags, and the amount of compost composition on the soil is thought to greatly affect the ability to store water in the media. This study aims to test drip irrigation on a mixture of compost and soil on storage of irrigation water. Tests were carried out at a ratio of 70%: 30%, 50%: 50% and 30%: 70%. Irrigation was tested at a duration of 5 minutes, 10 minutes, and 15 minutes, and the data analyzed included irrigation distribution data, discharge, soil moisture data (w) and daily soil moisture change data. The results of the analysis are presented in the form of tables and graphs, then discussed and concluded descriptively. The results of the analysis show that the flow rate obtained is greater if the difference in water level to the land is greater, and the average Cu value obtained is 95.79% which is very good. With initial soil moisture in the range of 19%-25, soil moisture gain obtained by drip irrigation for 5 minutes -10 minutes is around 12%, and for a duration of 15 minutes soil moisture gain is obtained by 8% -21%. The lowest recharge was obtained on land with 30% soil and 70% compost of 8%-12%. The amount of soil moisture reduction after 24 hours of irrigation test was 6% - 17%, the lowest reduction was at 70% compost and 30% soil around 6%.
PENGARUH DURASI IRIGASI TETES TERHADAP REDUKSI LENGAS TANAH PADA LAHAN POLYBAG I DEWA GEDE JAYA NEGARA; SALEHUDIN SALEHUDIN; I WAYAN YASA; HERI SULISTIYONO; ANID SUPRIYADI; LALU DWIKI AXELA ANDRIAWAN
GANEC SWARA Vol 17, No 3 (2023): September 2023
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v17i3.538

Abstract

Soil moisture is an important factor needed by plants for growth, and therefore the amount of soil moisture that can be stored depends on the type of soil or the composition of the soil-forming materials. Compost is one of the nutrients that is often used in the manufacture of planting media on land in the form of polybags, and the amount of compost composition on the soil is thought to greatly affect the ability to store water in the media, both the size and duration of storage. This study aims to examine the effect of using compost on storage of irrigation water in the form of soil moisture and how long it can be stored. in three-storey drip irrigation. The main data analyzed is soil moisture data (w) and the results of the analysis and discussion and conclusions are drawn descriptively. The results of the analysis show that the initial soil moisture content in the range of 19% -25%, can be given additional soil moisture by irrigation of about 12%. The average daily decrease in soil moisture that occurs in soil variation 1 (70%: 30% ) is 3% -4.4% and in soil variation 2 (50%: 50%), the average moisture reduction is around 3% -6%, soil moisture reduction in variation 2 is greater than soil variation 1 for all floors.
KINERJA MEDIA PENYARING GRANULAR LOKAL PADA FILTER TYPE UPFLOW UNTUK PENINGKATAN KUALITAS AIR SUNGAI MENINTING HUMAIRO SAIDAH; ANID SUPRIYADI; I WAYAN YASA; I DEWA GEDE JAYA NEGARA; DEWANDHA MAS AGASTYA
Ganec Swara Vol. 19 No. 1 (2025): Maret 2025
Publisher : Yayasan Al-Amin Qalbu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59896/gara.v19i1.236

Abstract

The availability of clean water remains a challenge in various regions, including Gegerung Village, West Lombok Regency, which relies on the Meninting River as its primary source of clean water. The construction of the Meninting Dam has led to increased water turbidity due to construction activities and exposed rock formations for dam infrastructure, necessitating an effective water purification solution to ensure safety and suitability for consumption. This study aims to evaluate the effectiveness of a combination of local filtration media, including ijuk (palm fiber), activated carbon, and zeolite, supplemented with pumice and/or silica sand. The research employs an experimental approach using an up-flow filtration system with three different media configurations. All configurations include ijuk, activated carbon, and zeolite, with variations introduced by adding silica sand, pumice, or both silica sand and pumice. Water samples were tested before and after filtration for turbidity, total suspended solids (TSS), pH, and dissolved oxygen (DO). The findings indicate that pumice is highly effective in reducing turbidity and TSS, achieving reductions of 89.4% and 96.56%, respectively. However, pumice use tends to decrease DO levels by up to 55%, making the filtered water quality suitable only for non-consumptive purposes based on DO standards. These results highlight the need for optimizing the combination of filtration media to maintain overall water quality. Further research is required to refine the filtration system to meet clean water standards
PERBANDINGAN KINERJA PENYARING AIR SISTEM UPFLOW PIPA VERTIKAL DAN PIPA U DALAM MENURUNKAN KEKERUHAN DAN TOTAL PADATAN TERSUSPENSI: Comparative Performance of Upflow Water Filter Systems with Vertikal Pipe and U-Pipe Configurations in Reducing Turbidity and Total Suspended Solids Humairo Saidah; Anid Supriyadi; Heri Sulistiyono; I Dewa Gede Jaya Negara
Ganec Swara Vol. 20 No. 1 (2026): Maret 2026
Publisher : Yayasan Al-Amin Qalbu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59896/gara.v20i1.591

Abstract

Efforts to enhance the performance of simple filtration systems have been continuously developed, one of which involves modifying the flow path within the filter. This study aims to evaluate the effect of incorporating a horizontal section into the filter pipe on its ability to reduce turbidity and Total Suspended Solids (TSS). The study was conducted using an experimental approach by comparing a vertikal pipe filter with a U-shaped pipe filter featuring variations in horizontal pipe length. The performance of each filter configuration was evaluated based on its effectiveness in reducing turbidity and TSS, and by determining the relative performance index to assess differences in filtration efficiency between configurations. The results indicate that the addition of a horizontal section to the filter pipe significantly enhances filtration efficiency. An increase in the horizontal pipe length corresponds to greater reductions in turbidity and TSS. The U-shaped pipe filter outperformed the vertikal pipe filter, achieving relative performance indices of 1.7 for turbidity reduction and 1.9 for TSS reduction. The higher performance indices observed for the U-shaped filter suggest that flow path modification in the form of a U-shaped configuration is more effective in removing suspended particles with relatively larger mass, indicating its potential application as a more efficient alternative design for simple filtration systems
Co-Authors AGUSTONO SETIAWAN Anid Supriyadi ANNISA HUMAYRA DIRGANTARA DEWANDHA MAS AGASTYA Heri Sulistiyono Humairoh Saidah I Wayan Yasa I WAYAN YASA Lalu Dwiki Axela Andriawan Salehudin Salehudin Suparjo Suparjo