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All Journal Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa Jurnal Sains Teknologi dan Lingkungan (JSTL) Jurnal Pengabdian Magister Pendidikan IPA GANEC SWARA Spektrum Sipil Prosiding Seminar Nasional Pengabdian Kepada Masyarakat
I Wayan Yasa
Fakultas Teknik, Universitas Mataram
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Public Health Social Sciences Transportation Other

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Model Runtut waktu untuk Peramalan Indeks Kekeringan Daerah Lombok Utara Humairo Saidah; I Wayan Yasa; Muh. Bagus Budianto; Syamsul Hidayat; I.D.G Jayanegara
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 5 No. 2 (2019): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (940.918 KB) | DOI: 10.29303/jstl.v5i2.130

Abstract

PDSI is the drought index method which has good accuracy to be applied in Lombok Island. However, this method is only able to hindcast the drought without any procedure to predict the drought index in the future. So, this model aims to recognize the characteristics of drought in North Lombok for early mitigation and anticipating drought disasters purposes in this region. The results obtained from this study are that the drought pattern in North Lombok has the SARIMA model of (0,1,2) (0,1,1)12. The drought in North Lombok mainly occurs between May-October with an increasing of drought index tends for over last 20 years.
KESERAGAMAN DAN PANCARAN IRIGASI PIPA PERFORASI PADA BERBAGAI KEMIRINGAN PIPA TRANSMISI I Dewa Gede Jaya Negara; Humairo Saidah; I Wayan Yasa; Adhitya Halim .P
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa Vol. 10 No. 1 (2021)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (477.663 KB) | DOI: 10.22225/pd.10.1.2513.142-157

Abstract

The potential of hilly dry land needs to be developed for limited land farming to have an equal distribution of food security in various potential areas. Many existing drylands, especially in hilly and sloping areas, have not been managed optimally for agriculture due to limited support for practical irrigation techniques. Utilizing differences in existing land elevation is a potential that can be exploited by irrigation techniques that require water pressure. The perforated pipe system irrigation technique has similarities to the mini sprinkler system because it uses water pressure, and it is very possible to be applied to sloped land conditions, but the ability of the perforation system needs to be known further so that it can be used for practical irrigation. For this reason, it is necessary to test the perforated irrigation system with certain variations of the slope of the beam range and uniformity, so that later it can be used as an initial reference. The test model uses a water source from a tendon as high as 3.7 m and with a tank capacity of ± 200 liters. The diameter of the transmission pipe is ½ inch with a length of 2.55 meters, and the lateral pipe as a perforation pipe with a 3mm hole consists of 3 pipes with a pipe length of 4 meters with a diameter of 1/2 inch and the distance between the holes of the perforation pipe is 60 cm. The test was carried out on 4 variations of the slope of 10º, 20º, 30º, and 40º with 4 variations of head 1 = 2.855 m, head 2 = 2.35 m, head 3 = 1.85 m, and head 4 = 1.30 m. Based on the research results, it shows that the greater the slope of the transmission pipe, the higher the head will be. The uniformity of the perforation irrigation was getting smaller the larger the slope with a minimum value of 85% and the highest being 91%. A large perforation beam is obtained at transmission slopes of 20º and 30º, namely 2.66 m and 2.40 m.
ANALISIS PENGARUH VARIASI JARAK DAN TINGGI STIK SPRINKLER TERHADAP KINERJA IRIGASI PADA LUAS LAHAN TERBATAS I Dewa Gede Jaya Negara; Syamsul Hidayat; I Wayan Yasa; Ni Luh Ayu Aprilianti
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa Vol. 10 No. 2 (2021)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.709 KB) | DOI: 10.22225/pd.10.2.3398.350-360

Abstract

The conversion of agricultural land in urban areas has resulted in increasingly narrow agricultural land and many irrigation networks are not functioning. This has resulted in many isolated lands that cannot even be served by irrigation, so that the alternative source of agricultural water is local shallow ground well water. With the potential of water sources and limited land area, farming is expected to utilize water efficiently. Small sprinkler irrigation systems such as the 24D Netafim on the market, are expected to be an alternative in providing irrigation and for that it is necessary to test the ability of the irrigation system on the irrigation radius and its uniformity at a duration of 15 minutes. The test results showed that the irrigation uniformity was above 85% at the distance between sprinklers 4.5 m, 5 m and 5.5 m and 6 m with a stick height of 0.5 m and 0.75 m. For stick heights of 1.0 m and 1.25 m at the same sprinkler distance, the uniformity coefficient is less than 85%. While the optimal irrigation radius obtained at a sprinkler distance of 4.5 m, 5 m and 5.5 m is an average of 5.6 m.
EFEK SUMUR RESAPAN TERHADAP PENGURANGAN VOLUME LIMPASAN PERMUKAAN I WAYAN YASA; SASMITO SOEKARNO; I DEWA GEDE JAYA NEGERA
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 (592.26 KB) | DOI: 10.35327/gara.v14i1.131

Abstract

Changes in land use not only affect the hydrological component, but also have an impact on the environmental sector, which include increasing the frequency of flooding and inundation, decreasing the availability of subsurface water, and drying up community wells. Various attempts have been made in efforts to reduce flooding and maintain sources of subsurface water, for example by applying infiltration well technology in each settlement. Infiltration wells will be able to function to re-enter rainwater falling on the pavement and can reduce flooding and inundation. This research is conducted with an empirical model that is connecting the amount of runoff that occurs after the availability of recharge wells. The purpose of this research is to get the ability of infiltration wells to reduce the occurrence of flooding in an area. The data used in the analysis are rain data and soil texture data. Based on the analysis results obtained dimensions of 0.8 m, 1 m and 1.2 m infiltration wells with a depth of 2 m. The depth of ground water level is 1.94 m, the permeability value (k) of land is 0.24 x 10ˉ⁴ m / sec. From each of the infiltration well diameters, it can reduce the successive runoff namely; infiltration wells are 0.8 m in diameter from runoff of 0.479 m³ / sec and after an infiltration well is reduced to 0.057m³ / sec, infiltration wells diameter 1.2 from runoff is 0.401 m³ / sec and after an infiltration well is reduced to 0.0475 m / second, and in the diater infiltration well 2 m from runoff of 0.377 m³ / sec and after the infiltration well is reduced to 0.0571 m / sec.
ANALISIS KARAKTERISTIK KEDALAMAN HUJAN DAN IKLIM DI PULAU LOMBOK I WAYAN YASA; YUSRON SAADI; HERI SULISTYONO; ERY SETIAWAN; HARTANA HARTANA; I DEWA GEDE JAYA NEGARA
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.v15i2.219

Abstract

Climate and rain parameters are important factors that affect the availability of water resources on the earth's surface. The phenomenon of climate change that occurs today has an impact on the depth and distribution of rain and climatological parameters. The existence of rain and climate on Lombok Island changes very significantly every year. These changes affect various sectors, especially the irrigation sector. Thus, various adjustments must be made, such as adjusting the time of planting, cropping patterns and the types of plants being cultivated. In this case, knowledge about the characteristics of rain and climate that occurs on the island of Lombok is very important to know the pattern and magnitude of the incident as well as the time of the incident. This study was conducted to determine the condition of each climate variable in the Lombok island region by calculating the monthly average for 25 years. The smoothing uses the Theissen polygon method by utilizing 19 scattered rain station data and 4 climatological stations. Based on the analysis carried out, the results showed that the average monthly temperature ranged from 26.17-27.09°C, humidity 87.70-89.83%, sunlight 39.79-69.44%, and wind speed 53 ,73-110,21knot. The highest rainfall occurred in January of 235.33 mm, while the lowest occurred in August of 18.12 mm.
Variasi Penempatan Bronjong Di Hilir Kolam Olak Terhadap Pola Gerusan Dasar: Variations in the Placement of Gabions in the Downstream of the Pool Against Basic Scouring Pattern I Dewa Gede Jaya Negara; Salehudin Salehudin; Lilik Hanifah; I Wayan Yasa; Ni Putu Ira Sintia Kurnianti
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 1 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i1.300

Abstract

The existence of a weir is often disrupted by the occurrence of scouring downstream, which results in an insecure weir position. This study aims to determine the effect of installation of gabion variations downstream of stilling ponds on the depth and length of scour at the bottom of the channel. The test was carried out at the Hydrology and Coastal Laboratory of FT Unram in a straight channel with dimensions of 7.5 m x 0.55 m x 0.5 m, with an Ogee type spillway and a USBR Type III stilling pond. The dimensions of the test gabions are 0.55 m x 0.18 m x 0.09 m with a gravel diameter of 1 (P1 ) 0.035 m, (P2 ) 0.0175 m and (P3 )0.00875 m, and the variation of discharge 1(Q1) 0.0019 m3/s, discharge 2(Q2) 0.0036 m3/s, discharge 3 (Q3) 0.0047 m3/s and discharge 4 (Q4) 0.0065 m3/s. The results showed that in conditions without gabions, scour was prone to occur near the end of the stilling pond to the center of the channel bottom and towards the right side of the channel, with a scour depth of 0.002m – 0.023m and a length of 0.075m – 0.45m. For conditions with gabions, the scour length ranges from 0.15m – 0.275m with a depth of 0.0016m – 0.026 m, the scour occurs more evenly to the left and right of the channel.  
Optimalisasi Lahan Pekarangan Dalam Upaya Peningkatan Ketahanan Pangan Tingkat Keluarga Dengan Sistem Budidaya Tanaman Vertikultur Dan Konvensional I Wayan Yasa; Abdul Muaz Ghazali; Ike Puspasari; Ismayanti Ismayanti; Linda Asnawati; M. Abbil Pratama; Apollonius Monsart; Tia Ardiani; Devi Suryani Putri; Lulu Lutfiati
Jurnal Pengabdian Magister Pendidikan IPA Vol 4 No 3 (2021)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (376.405 KB) | DOI: 10.29303/jpmpi.v4i3.960

Abstract

Permukiman di Kawasan perkotaan pada umumnya memiliki lahan pekarangan yang tidak luas rata-rata 100 m2 – 250 m2 dengan luas bangunan rata-rata 36 m2 – 100 m2. Dengan sisa luas yang masih tersedia sangat memungkinkan dimanfaatkan untuk melakukan budidaya tanaman pangan dalam pemenuhan kebutuhan sehari-sehari rumah tangga. Pembudidayaan tanaman pangan dapat dilakukan secara vertikal memanfaatkan material lokal dan bahan-bahan limbah yang tersedia. Berbagai jenis tanaman yang dapat dibudidayakan diantaranya tanaman bayam merah, patcoy, selada, kangkung darat, sawi, jahe merah, jahe biasa, temulawak, kunyit, serai, kates jepang dan kencur. Dalam meningkatkan kesuburan pertumbuhan tanaman menggunakan pupuk organik dan untuk mencegah serangan hama menggunakan pestisida nabati yang dibuat langsung menggunakan bahan-bahan alamiah. Metode yang digunakan dalam budidaya tanaman dipekarangan yaitu vertikultur dan konvensional. Metode vertikulturul yaitu dengan membuat rangka-rangka/pagar vertikal dengan penyangga berupa kolom-kolom yang dibuat dari bambu dengan jarak kolom dan tinggi rangka disesuiaikan dengan ruang yang tersedia. Wadah tanaman menggunakan botol-botol plastik air mineral dan kaleng-kaleng bekas dan diikatkan pada rangka/pagar. Sementara untuk metode konvensional dengan melakukan penanaman sistem tumpangsari yang langsung ditanam pada tanah. Pupuk dan insektisida dibuat dengan memanfaatkan bahan alamiah yang mudah diperoleh dapat berupa limbah organik dan bahan-bahan kebutuhan sehari-hari. Hasil yang diperoleh dalam pelaksanaan kegiatan yaitu masyarakat perkotaan dapat mengenal dan menerapkan system budidaya tanaman secara vertikultur dan konvensional dalam memanfaatkan ruang-ruang kosong di pekarangan. Selain itu masyarakat juga dapat membuat pupuk organik dan insektisida organik memanfaatkan bahan-bahan sehari-hari yang tersedia di rumah tangga. Sementara hasil budidaya tanaman yang dibudidayakan dimanfaatkan untuk kebutuhan bersama masyarakat setempat dan menjadi kebun percontohan.
PELATIHAN PEMBUATAN BIOPORI UNTUK PERESAPAN LIMPASAN AIR HUJAN DAN PENGENDALIAN BANJIR DI DAERAH ALIRAN SUNGAI ANCAR DAN UNUS HULU KOTA MATARAM I Dewa Gede Jaya Negara Jaya Negara; Lilik Hanifah; Hasyim; Agus Suroso; I Wayan Yasa
Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Vol 2 (2021): PROSIDING SEMINAR NASIONAL PENGABDIAN KEPADA MASYARAKAT - SNPPM2021
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (564.297 KB)

Abstract

Abstract This service aims to improve the skills of the community in the Ancar and Unus watersheds upstream of Mataram City in reducing the occurrence of flooding in the downstream area. By providing training on making biopores to residents in the Sandubaya sub-district who live around the watershed, it is possible to overcome the impact of development on flooding with the active participation of residents. Utilization of organic waste such as household waste and produced prayer waste can be used to fill biopore holes. The service activity with the topic of this training was carried out with the initial stage in the form of counseling, the second was training on making biopore and evaluating activities. This service activity has been going well and 15 participants' representatives have gained good knowledge about biopori. The results of the discussions and questions and answers that have been carried out have encouraged local residents to use the waste from praying leaves (from leaves) as a biopore filling material. From this training, residents have been able to make and install biopori, so they can play an active role in developing the installation of biopori in flood control efforts in the upstream watershed of Mataram City. Biopori has been successfully installed in upstream watersheds at 9 locations and residents are ready to use and maintain the media. Abstrak Pengabdian ini bertujuan untuk meningkatkan keterampilan masyarakat di daerah aliran sungai (DAS) Ancar dan Unus hulu Kota Mataram dalam meredukasi terjadinya banjir di daerah hilir. Dengan memberikan pelatihan pembuatan biopori pada warga di kecamatan Sandubaya yang bermukim di sekitar DAS tersebut, maka penganggulangan dampak pembangunan terhadap banjir akan dapat dilakukan dengan partisipasi aktif warga. Pemanfaatan sampah organik seperti sampah rumah tangga dan sampah sisa sembahyang yang terproduksi, dapat dimanfaatkan sebagai pengisi lubang biopori. Kegiatan pengabdian dengan topik pelatihan ini dilaksanakan dengan tahapan awal berupa penyuluhan ke dua adalah pelatihan pembuatan biopori serta evaluasi kegiatan. Kegiatan pengabdian ini telah berjalan dengan baik dan 15 orang perwakilan peserta telah mendapatkan pengetahuan tentang biopori dengan baik. Hasil diskusi dan tanya jawab yang dilakukan, telah mendorong warga setempat untuk memanfaatkan sampah sisa sembahyang (dari dedaunan) sebagai bahanpengisi biopori. Dari pelatihan ini warga telah mampu membuat dan memasang biopori , sehingga dapat berperan aktif melakukan pengembangan pemasangan biopori dalam upaya pengendalian banjir di DAS hulu Kota mataram. Telah berhasil terpasang biopori di DAS hulu pada 9 lokasi dan warga siap melakukan pemanfaatan dan perawatan media tersebut.
PEMANFAATAN SUMUR RESAPAN UNTUK MEREDUKASI LIMPASAN PADA LINGKUNGAN PERMUKIMAN PERUMAHAN: Utilization of Absorption Wells to Reduce Runoff in a Residential Settlement I Dewa Gede Jaya Negara; Lalu Wirahman Wiradarma; I Wayan Yasa; Humairo Saidah; Anid Supriyadi; I G A N K Wardana
Spektrum Sipil Vol 10 No 2 (2023): SPEKTRUM SIPIL
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/spektrum.v10i2.328

Abstract

Perubahan kawasan persawahan menjadi perumahan kerap kali terjadi dan sekitar ±6 hektar sawah dijadikan perumahan dengan tipe  27/77, 36/103 dan 50/105. Adanya pembangunan perumahan tersebut  akan meningkatkan limpasan air hujan dipermukaan, dan untuk mengatasinya dapat memanfaatkan sumur resapan sebagai alternatif. Berdasarkan data uji  resapan tanah lokasi studi diperoleh 6,329 cm/jam dan  kedalaman muka air tanah 2,8 m sampai 3 m musim hujan, maka sumur resapan berpotensi diterapkan pada lokasi  studi. Studi ini bertujuan untuk mengetahui besar reduksi limpasan hujan dari penggunaan sumur resapan. Debit limpasan rata-rata lokasi studi  sebesar 0,0103 m³/dt, dan  0,0408 m³/dt. Reduksi limpasan rata-rata  pada tipe rumah 36/103 sebesar 30%-43%, pada tipe rumah 50/105 reduksi limpasan besarnya 39,9% dan pada tipe rumah 27/77 reduksi limpasan terjadi sebesar 27%- 47%. Secara umum reduksi limpasan hujan dilokasi studi besarnya kurang dari 50%.
PENGARUH VARIASI EMITTER PADA JARINGAN IRIGASI TETES PIPA PVC BERTINGKAT TERHADAP DISTRIBUSI DAN KESERAGAMANAN IRIGASI I DEWA GEDE JAYA NEGARA; ANID SUPRIYADI; EKO PRADJOKO; ATAS PRACOYO; YUSRON SAADI; I WAYAN YASA
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.v18i1.791

Abstract

Test efforts to find alternatives to increase the even distribution of irrigation water on service land. The results of previous research conducted by researchers show that drip irrigation which is designed in stages with a water source from a drip irrigation tank using two types of emitters in a multi-stage drip irrigation system provides different irrigation water distribution results, so it is necessary to find a solution. so that irrigation can occur evenly. To get an alternative that might be tested is to use several types of emitters in the PVC pipe drip point holes, because these tools already exist on the market. This research aims to determine the effect of using two types of emitters, namely 2 lt/min and 4 lt/min emitters on distribution of irrigation water in a 4-tiered drip irrigation network. The test data analyzed includes irrigation distribution data, flow discharge data and irrigation uniformity (Cu), and the results of the analysis are presented in the form of tables and graphs and discussed before conclusions are drawn. The analysis results show that the average Cu for the two types of emitters is above 97%, which is very good and the two emitters have a very even distribution. The difference in distribution volume for each emitter, for a 2ml/min emitter is around 1ml -2 ml and for a 4 ml/min emitter it is 1ml -2 ml, with an irrigation network flow rate of around 84ml/min – 99.7 ml/min.
Co-Authors Abdul Muaz Ghazali Adhitya Halim .P Agus Suroso ANID SUPRIYADI Anid Supriyadi Apollonius Monsart ATAS PRACOYO Devi Suryani Putri DEWANDHA MAS AGASTYA DEWANDHA MAS AGASTYA EKO PRADJOKO ERY SETIAWAN Fika Septina Pangaribuan Hartana Hartana Hartana HARTANA HARTANA Hasyim Hasyim, Hasyim Heri Sulistiyono Heri Sulistiyono HERI SULISTYONO Hidayat, Syamsul Humairoh Saidah I Dewa Gede Jaya Negara I Dewa Gede Jaya Negara I DEWA GEDE JAYA NEGERA I DEWA GEDE JAYANEGARA I G A N K Wardana I.D.G Jayanegara Ike Puspasari Ismayanti Ismayanti Karyawan, I Dewa Made Alit Lalu Wirahman Wiradarma Lilik Hanifah Lilik Hanifah Linda Asnawati Lulu Lutfiati M. Abbil Pratama MUH BAGUS BUDIANTO Muh. Bagus Budianto Ni Luh Ayu Aprilianti Ni Putu Ira Sintia Kurnianti Salehudin Salehudin SASMITO SOEKARNO Tia Ardiani Yusron Saadi Yusron Saadi YUSRON SAADI