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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

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.

Increasing the Utilization of Bamboo for Rainwater Capture Networks in Batu Jaran Hall, Batulayar Village Yasa, I Wayan; Hasyim, Hasyim; Karyawan, I Dewa Made Alit; Jayanegara, I Dewa Gede; Saidah, Humairo; Rohani, Rohani; Agastya, Dewandha Mas
Unram Journal of Community Service Vol. 5 No. 4 (2024): December
Publisher : Pascasarjana Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ujcs.v5i4.753

The problem of clean water for people in the highlands always arises every dry season. Getting clean water every day requires a lot of effort to find a water source that is very far away. Some people even have to spend additional money to get clean water. This is also the case with people in Batulayar sub-district who live in the highlands, especially in the mountains. Surface water sources are not available so that it becomes a routine problem every year. In overcoming this problem, some people make rainwater reservoirs either in groups or individually. The reservoir is made with several materials in the form of a reservoir by making a hole in the ground surface covered with plastic or tarpaulin and a reservoir made of brick/brick masonry. The method of capturing water is directly from the ground surface by making a channel and there is by making a reservoir from local materials in the form of bamboo which then the captured water is channeled into the reservoir. The use of local materials in the form of bamboo is very potential to be used because in the Batulayar area, especially in the mountains, the availability of bamboo is very abundant. Bamboo with an age of 3 years already has quite high strength both for water flow materials and as construction materials. The weakness that is still faced by the community in utilizing bamboo is the connection method which is still very simple, so that when it rains with high intensity the connection comes loose. In using bamboo as a rainwater catchment network, it is very important to socialize the right connection model to be used in capturing rainwater.

Sosialisasi Perkerasan Ramah Lingkungan di Desa Medana Kecamatan Tanjung Yasa, I Wayan; Alit, I Dewa Made; Wiradarma, Lalu Wirahman; Sideman, Ida Ayu Oka Suwati; Setiawan, Agustono; Jayanegara, I Dewa Gede; Saidah, Humairo; Hasyim; Agastya, Dewandha Mas; Bawu, Mario Alfredo
Jurnal Pengabdian Magister Pendidikan IPA Vol 8 No 2 (2025): April-Juni 2025
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v8i2.11415

Pembagunan permukiman dan pusat-pusat perekonomian di Desa Medana mengalami pertumbuhan yang sangat pesat seiring dengan perkembangan kabupaten Lombok Utara sebagai kabupaten baru. Semua aspek berkembang sangat cepat seperti permukiman, pertokoan, perkantoran maupun tempat-tempat pariwisata. Berbagai kebutuhan sarana dan prasarana penunjang pertumbuhan perkotaan tersebut seperti parkir, jalan, sistem dranase, pembuangan limbah, air bersih dan telokomunikasi. Salah satu dampak dari pertumbuhan tersebut yaitu penggunaan perkerasan permukaan lahan dengan menggunakan asphlat, beton serta paving block. Penggunaaan perkerasan tersebut yang rata-rata kedap air akan menyebabkan kecilnya volume air yang masuk ke dalam tanah sehingga menyebabkan terjadinya banjir, genangan dan turunnya permukaan air tanah. Dalam upaya mengurangi permasalah tersebut sangat diperlukan adanya inovasi sistem perkerasan ramah lingkungan yang tetap memberikan konstribusi terhadap air bawah permukaan, mengurangi banjir, konservasi air serta menjaga siklus air permukaan dan bawah permukaan. Pemanfaatan sistem perkerasan grass block paving atau dengan grass block dengan pengisi material alam (batu pecah atau coral) akan dapat mengurangi terjadinya genangan atau banjir, dimana air limpasan permukaan akan masuk kedalam tanah melalui pori paving block. Sehingga dengan demikian limpasan dapat dikurangi dan air yang masuk menjadi infiltrasi akan selalu tetap dijaga. Pelaksanaan pengabdian diikuti oleh seluruh perangkat desa, masyarakat, tokoh masyarakat, karang taruna, serta mahasiswa kuliah kerja nyata Universitas Mataram

Sosialisasi Potensi Bencana dan Rekomendasi Mitigasi Kawasan Destinasi Air Terjun di Desa Santong, Kabupaten Lombok Utara Karyawan, I Dewa Made Alit; Rohani; Hasyim; Jayanegara, I Dewa Gede; Salehudin; Saidah, Humairo; Yasa, I Wayan
Jurnal Pengabdian Magister Pendidikan IPA Vol 8 No 2 (2025): April-Juni 2025
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v8i2.11475

Santong Village, located in North Lombok Regency, has a very potential waterfall tourist attraction. However, this area is also prone to natural disasters such as landslides and flash floods. To improve public understanding of these risks, disaster mitigation socialization activities were carried out aimed at building a protection strategy for waterfall tourist destinations. This activity involved mapping potential risks, collaboration with KKN PMD students and the community, and synergy between agencies to ensure tourism management that is in line with environmental conservation principles. The main focus of this activity is to foster community preparedness and prepare recommendations for disaster mitigation policies that are oriented towards the sustainability and safety of tourist destinations. The implementation process begins with the preparation stage, including preparing an activity plan, forming an implementation team, coordinating with the village government, preparing supporting instruments, reviewing literature, and managing permits. After that, socialization materials were prepared starting from collecting primary and secondary data through interview methods, field observations, and document reviews. The data obtained was analyzed to identify potential threats, response capacity, and develop appropriate mitigation strategies. The socialization was carried out by presenting speakers from the Unram Community Service Team and the Regional Disaster Management Agency (BPBD) of North Lombok Regency, and inviting community participation from various village elements. This activity was also equipped with the delivery of materials, visual presentations, and evaluations in the form of pre- and post-tests to assess the participants' understanding. The activity with participants from village officials and the community with a participation rate reaching 80%. The material presented included a general description of the village, the potential for waterfall tourism, and various disaster risks such as landslides, flash floods, earthquakes, and fallen trees. The results of the analysis showed that the main threats were landslides and flash floods. From the discussions that were held, a number of proposals emerged such as mapping vulnerable areas, compiling evacuation routes, and developing an early warning system. This socialization has proven effective in increasing public awareness of the importance of disaster mitigation, while also encouraging active community participation in maintaining the sustainability and sustainability of tourism in Santong Village.

Artificial Rainfall Aquifer to Supply Clean Water Requirement During the Dry Season in Selengen Village, North Lombok Regency Yasa, I Wayan; Agustawijaya, Didi Supriyadi; Pracoyo, Atas; Setiawan, Ery; Hasyim, Hasyim; Karyawan, I Dewa Made Alit; Saidah, Humairoh; Jayanegara, I Dewa Gede; Agastya, Dewandha Mas
Unram Journal of Community Service Vol. 5 No. 2 (2024): June
Publisher : Pascasarjana Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ujcs.v5i2.608

Selengen Village is one of the villages in North Lombok Regency that always experiences drought and lack of clean water every year. The problem of clean water availability is caused by limited water sources on the surface. The frequency of rainwater in Selengen Village is very small and with very low intensity. In order to meet the need for clean water, the community has to pay additional costs to buy clean water or wait for a drop from the government. The Selengan Village community has limited information regarding simple methods that can be used to collect clean water sourced from rainwater. The method used to introduce rainwater capture as a source of clean water is to provide direct outreach to the Selengen Village community about rainwater storage in the form of ABSAH (Artificial Aquifer for Rainwater Savings). The ABSAH method can be done individually or in groups. The socialization was carried out at the Panggung Barat Hamlet office involving the community consisting of farmer groups, community leaders, youth organizations and housewives. The result of the socialization regarding the introduction of artificial rainwater aquifers is the high desire of the community to create rainwater storage, either independently/individually or in groups. In the process of making it, the community hopes to get assistance from the implementation team so that the calculation of the storage volume is in accordance with the volume of water used. Apart from that, the community also hopes to be given drawings of storage designs, installations for collecting water from the roofs of houses and designs of distribution networks to people's homes.

Increasing the Utilization of Bamboo for Rainwater Capture Networks in Batu Jaran Hall, Batulayar Village Yasa, I Wayan; Hasyim, Hasyim; Karyawan, I Dewa Made Alit; Jayanegara, I Dewa Gede; Saidah, Humairo; Rohani, Rohani; Agastya, Dewandha Mas
Unram Journal of Community Service Vol. 5 No. 4 (2024): December
Publisher : Pascasarjana Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ujcs.v5i4.753

The problem of clean water for people in the highlands always arises every dry season. Getting clean water every day requires a lot of effort to find a water source that is very far away. Some people even have to spend additional money to get clean water. This is also the case with people in Batulayar sub-district who live in the highlands, especially in the mountains. Surface water sources are not available so that it becomes a routine problem every year. In overcoming this problem, some people make rainwater reservoirs either in groups or individually. The reservoir is made with several materials in the form of a reservoir by making a hole in the ground surface covered with plastic or tarpaulin and a reservoir made of brick/brick masonry. The method of capturing water is directly from the ground surface by making a channel and there is by making a reservoir from local materials in the form of bamboo which then the captured water is channeled into the reservoir. The use of local materials in the form of bamboo is very potential to be used because in the Batulayar area, especially in the mountains, the availability of bamboo is very abundant. Bamboo with an age of 3 years already has quite high strength both for water flow materials and as construction materials. The weakness that is still faced by the community in utilizing bamboo is the connection method which is still very simple, so that when it rains with high intensity the connection comes loose. In using bamboo as a rainwater catchment network, it is very important to socialize the right connection model to be used in capturing rainwater.

2D Modeling for Structural Flood Mitigation and Normalization with HEC-RAS: A Case Study of Tabelo River Agastya, Dewandha Mas; Kusuma, Rr. Widyawati Tresna; Jayanegara, I Dewa Gede; Yasa, I Wayan; Sulistiyono, Heri
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 16 No. 2 (2025)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2025.016.02.9

Changes in land use for the development of the Mandalika Special Economic Zone (SEZ) have led to increased flooding. A rainfall intensity of 35 mm recorded at the ARR KEK Mandalika station led to a flood event, with a water level reaching 1.2 meters on March 23, 2022. Therefore, a study is needed to determine the flood discharge that affects the Tabelo Watershed and to identify the appropriate structural mitigation measures for flood management. After conducting frequency analysis with Hydrognomon and Generalized Extreme Value (GEV), the flood discharge for the 50, 100, and 200-year return periods was 149.5 m3/s, 162.5 m3/s, and 175.2 m3/s. Structural mitigation by river normalization and levees construction on the Tabelo River was carried out along 1882.5 m at stationing P0 – P101 and 468.5 m at stationing S0 – S30. The levee construction is planned to be 14 m wide for the upstream section, up to the junction, and 16 m wide for the junction to the river mouth. The river levee is designed to be 3.30 meters high and 16 meters wide. The stability of the levee is calculated by considering its stability against overturning, sliding, and reactions from the foundation soil under both normal and seismic conditions. Based on the results of the stability calculations, the safety factor values for stability against shear forces under normal and earthquake conditions were obtained, namely, Fs (3.81 > 2.00) and Fs (1.27 > 1.25).

Pelatihan Identifikasi Potensi Bencana Banjir dan Tanah Longsor di Desa Santong Kecamatan Kayangan Kabupaten Lombok Utara Yasa, I Wayan; Karyawan, I Dewa Made Alit; Jayanegara, I Dewa Gede; Saidah, Humairo; Hasyim; Rohani; Agastya, Dewandha Mas
Jurnal Pengabdian Magister Pendidikan IPA Vol 8 No 4 (2025): Oktober-Desember 2025
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v8i4.13556

Desa Santong merupakan salah satu desa di Kecamatan Kayangan Kabupaten Lombok Utara memiliki potensi sumberdaya alam seperti pertanian, perkebunan dan hutan yang berlimpah. Didukung dengan kondisi topografis yang berbukit dengan suhu yang dingin menjadikan Desa Santong wilayah yang sangat subur dengan tingkat perekonomian masyarakat di atas rata-rata. Demikian pula halnya dengan lokasi Desa Santong yang merupakan kaki gunung Rinjani, Desa Santong juga menjadi salah satu jalur alternatif pavorit yang sering menjadi pilihan bagi pendaki untuk melakukan pendakian ke Gunung Rinjani. Selain potensi yang dimiliki Desa Santong yang strategis bagi masyarakat tersimpan potensi berbagai bencana hidroklimatologi dan geologi. Kondisi wilayah yang didomonasi perbukitan potensi terjadinya tanah longsor sangat besar. Demikian juga dengan intensitas dan frekuensi hujan yang cukup tinggi menjadikan Desa Santong salah satu desa yang memiliki peluang terjadinya bencana banjir cukup besar. Dalam upaya mengurangi dampak dari potensi bencana hidroklimatologi dan tanah longsor sangat penting seluruh masayarakat Desa Santong mempunyai pengetahuan terhadap wilayah rawan bencana serta strategi mengurangi dampak jika terjadi bencana. Pelatihan identifikasi bencana banjir dan tanah longsor merupakan salah satu upaya menambah pengetahuan masyarakat terhadap bencana, termasuk melakukan mitigasi, penyiapan jalur evakuasi serta pemulihan pasca terjadi bencana. Pelatihan dilakukan di Kantor Desa Santong yang diikuti oleh berbagai unsur masyarakat seperti: perangkat Desa, Kadus, Tokoh Masyarakat, Karang Taruna, PKK, Mahasiswa KKN Unram dan kelompok Sadar Wisata (PokDarWis). Besar harapan masyarakat Desa Santong untuk melakukan pendampingan dalam menyiapkan dan memasang tanda-tanda untuk jalur evakuasi dan penentuan titik kumpul jika terjadi bencana.

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