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All Journal Jurnal Ilmiah Elektronik Infrastruktur Teknik Sipil Journal of Marine and Aquatic Sciences Buletin Udayana Mengabdi Jurnal Spektran Ecotrophic, Journal of Environmental Science ILMU KELAUTAN: Indonesian Journal of Marine Sciences Jurnal Teknik Sipil Journal of Marine Research and Technology Jurnal Sains Riset International Journal of Environmental, Sustainability, and Social Science Ulil Albab

I Gusti Bagus Sila Dharma

Fakultas Kelautan Dan Perikanan Universitas Udayana

Author-ID : 253205

Religion Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Social Sciences

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POTENSI AIR PERMUKAAN DAERAH ALIRAN SUNGAI UNDA UNTUK MEMENUHI KEBUTUHANAIR DOMESTIK DAN NON DOMESTIK DI KABUPATEN KARANGASEM Gede Agus Bawantu; I Gusti Bagus Sila Dharma; Ni Nyoman Pujianiki
JURNAL SPEKTRAN Vol 6 No 1 (2018): Vol. 6, No. 1, Januari 2018
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (632.578 KB)

Karangasem regency, which had a population of 406,600 inhabitants in 2014, still has areas that are prone to water supply to meet the domestic and non-domestic needs. This is proved by the fact that some 16 villages are not served by PDAM network spreading across Selat, Sidemen, Bebandem, Abang and Kubu districts. There is Undawatershed which still has the potential to be developed, in addition to the approximately 90 percent of the watershed area of Unda and springs that provide supply to the area contained in the administrative region of Karangasem regency. The availability of water, was analized using the water balance principle of NRECA and F.J Mock methods as the most appropriate model to the location of study. Synthetic discharge data of the analysis results are used as data in the analysis of mainstay discharge so the potential for surface water that can still be used are known and developed in the Undawatershed. In order to harness the potential of the surface water in the watershed of Unda, the simulation of water allocation of Undawatershed. Based on the results of rainfall data of 2003 to 2014 coupled with the supply of water springs discharge, the average discharge potential of Undawatershed for Q80 is 11.54 m3/sec and for Q90 is 8.97 m3/sec. To plan the utilization and development of surface water potential of Undawatershed, from some of the scenarios that have been made it is known that the potential available in the watershed of Unda can be utilized to meet the domestic and non-domestic water needs of community in five (5) districts suffered from water crisis in Karangasem regency including Selat, Sidemen, Bebandem, Abang and Kubu districts. Keywords: surface water potential, the domestic and non-domestic water needs, utilization and development plan.

PEMANFAATAN SUMBER DAYA AIR DAS YEH PENET SEBAGAI AIR IRIGASI DAN AIR BAKU PDAM I Made Mudiasa; IG. B Sila Dharma; I Ketut Suputra
JURNAL SPEKTRAN Vol 5 No 1 (2017): Vol. 5, No. 1, Januari 2017
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Abstract : Tukad Penet is one of the biggest rivers in Bali which is used to support farming and fresh water demand. The increasing of water demand in various sectors such as for irrigation and drink water recently using water from Yeh Penet source shows the over use of its water has caused some conflicts between the use of the water user for irrigation and another use. Therefore, it was needed to review the use of Yeh Penet water to see how big the potential of its water that could be exploited to support the water source demand. The optimal analysis of water usage was carried out in six regional irrigation (DI) used Penet river water such as DI Peneng, DI Kacangan, DI Luwuscarang Sari, DI Penarungan, DI Kapal and DI Munggu. This analysis was based on cropping, planting and water management as well as a maximum water raw demand of the regional company of drinking water (PDAM) in Tabanan and Badung regency. Based on the simulation result, water availability in each irrigation regional (DI) depended on the cropping and planting. It was needed to provide the planting and rotation system for some irrigation regionals in river fluctuation discharge. The deficit of irrigation water balance occurred in DI Peneng, DI Luwuscarang sari, and DI Kacangan. The optimal use of irrigation water in the third irrigation regional was carried out by using planting stimulation and water management. The water balance analysis result at watershed in the part of downstream Penet watershed showed the availability of water surplus occurred in alternative plan I and II. The water balance analysis showed water availability in alternative plan I of a minimum 0.04 million m3 and maximum 1.43 million m3, whereas in alternative plan II the wasted water availability of a maximum 0.25 million m3 and a maximum 1.51 million m3. The potential development of Penet watershed in alternative plan I was 0.67 million m3 (0.52 m3/sec) and in alternative plan II was 0.76 million m3 (0.58 m3/sec) was not able to support the total water demand in Badung and Tabanan regency. Besides, the water source development of Penet watershed only occurred in downstream part of Yeh Penet river to avoid some conflicts of water utilization in Penet watershed.

MODEL PENGANGKUTAN SAMPAH DI KOTA BANGLI Pande N Sari Saraswati; I G. B Sila Dharma; I Gst Ketut Sudipta
JURNAL SPEKTRAN Vol 1, No 2, Juli 2013
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

The garbage transportation in Bangli City is currently done using a direct individual pattern (door to door). The vehicles used are dump trucks which are not covered, so they pollute the areas they pass by. Most of the vehicles are in bad condition. This study was aimed at identifying the transportation routes, the number of vehicles needed, the temporary place of garbage disposal ‘Tempat Pembuangan Sementara’ (TPS), and the rate of garbage retribution. The research method included the sample of garbage from the place of residence and the place of non residence based on SNI-19-3964-1994 used as a reference. This model used five compactor trucks for carrying garbage from 283 container bins with capacity of 0.36 m3, and one armroll truck for carrying the market garbage from four loudhaul with capacity of 6 m3 per day. The amount of retribution is analyzed based on the calculation of investment feasibility for 10 years time at 18% MARR interest rate, with an assumption that there was subsidy from the government. It was found that the value of NPV (Net Present Value) was Rp. 35.673.540,99, the value of BCR (Benefit of Cost Ratio) was 1.021 and the value of IRR (Internal Rate of Return) was 19.11%. The monthly rates of retribution were Rp. 2,000.00/family, Rp. 20,000.00/school unit, Rp. 25,000.00/office unit, Rp. 8,000.00/shop unit, Rp. 20.000.00/restaurant unit, Rp. 2,000.00/hotel/accommodation unit, and Rp. 6,000.00/market trader.

Upaya Pengolahan Limbah Kotoran Babi Menggunakan Komposter Rumah Tangga Widya Sari; I Wayan Budiarsa Suyasa; I.G.B Sila Dharma
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 12 No 2 (2018)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

ABSTRACT The production of pig manure waste potentially pollutes the soil, water and air. One of the most effective processing a waste treatments is through composting. The composting process takes a long time if not assisted by the activator as decomposers of organic materials in order to accelerate the composting process. Activators such as local microorganism (MOL) contain macro nutrients, micro and active microorganism that potentially decomposed organic materials, growth stimulants and pest/disease control agents such as to help speed up the composting process. This study aims to determine the C/N ratio of optimal raw materials for composting of pig manure and vegetable waste, determining the effect of adding local microorganism (MOL) to the length of time of composting and determining the effectiveness of business from composting of pig manure and vegetable waste based on the calculation of B/C ratio. This research uses quantitative approach with experiment method. The first stage is the preparation of the raw material which is divided into three groups : composition 1 with 75% (pig manure) and 25% (vegetable waste), composition 2 with 50% (pig manure) and 50% (vegetable waste) and then composition 3 with 25% (pig manure) and 75% (vegetable waste). Furthermore, the best raw material composition was treated with variations of MOL addition of A (100 ml), B (300 ml), C (500 ml) and D (without MOL). The results showed that the composition of the best raw material mixture was a mixture composition of 25% (pig manure) and 75% (vegetable waste) with a C/N ratio of 38.95. The effect of MOL addition indicates that the greater MOL volume the faster to composting process. The quality compost with addition of MOL has C/N ratio levels is (16,30), N-total (1,65%), P tersedia (8043,02 ppm), K tersedia (8857,40 ppm), Fe (1,87%), Mn (0,09%) Zn (480 ppm) in which that value meets the SNI 19-7030-2004. Based on analysis of B/C ratio obtained result of 1.04 where the value is approaching criteria B/C ratio more than 1.00 which means compost business feasible to be developed. Keywords : Pig manure, MOL, time of composting, composter, B/C ratio

EFEKTIVITAS PENERAPAN AMDAL DALAM PENGELOLAAN LINGKUNGAN HIDUP PADA PEMBANGKIT LISTRIK DI BALI – STUDI KASUS PLTD/G PESANGGARAN Helga Margareta Hunter; Made Sudiana Mahendra; I.G.B. Sila Dharma
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 11 No 1 (2017)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

EFFECTIVENESS OF AMDAL APPLICATIONS IN ENVIRONMENTAL MANAGEMENT ON ELECTRICAL GENERATOR IN BALI - CASE STUDY PLTD / G PESANGGARANThe development and sustainability of power plant’s activity has a positive impact, such as the increased electricity energy which will indirectly boost the economy, but it also has negative impact, such as the rising pressure towards environment. One way to prevent it from damaging environment is to require stakeholders and industry actors to have the environment permit including EIA (Environment Impact Assessment). The objective of this study was to find out the effectiveness of EIA application on power plant on PLTD/G Pesanggaran. This study was conducted with a descriptive qualitative approach which used data from observations, interviews, questionnaires, and literatures. Location of this study was at PLT/D Pesanggaran. The data that were gathered is used to be the base for value determination from valuation categories, so that the value of effectiveness of EIA application in PLTD/G Pesanggaran is subsequently gained. The EIA implementation of PLTD/G Pesanggaran as a whole was sufficient and in accordance with the environmental document. Supervision of RKL-RPL implementation which was done by BLH had been carried out systematically and effectively. The effectiveness value of EIA implementation in PLTD/G Pesanggaran was 94%, which means that the EIA implementation was effective.

IDENTIFIKASI SUMBER PENCEMAR DAN ANALISIS KUALITAS AIR TUKAD SABA PROVINSI BALI Putu Desy Darmasusantini; I Nyoman Merit; I G.B Sila Dharma
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 9 No 2 (2015)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Availability of clean water for drinking water increasingly scarce, then efforts to utilize alternative flow of river water as drinking water and raw water industry one of them is Saba River. Purpose of research is to determine the characteristic of pollution source which will be impactto the changing of water quality in physical, chemical, and biological in up, middle and down stream area of Saba River, water quality and pollution index of Saba River. Determination of samples by using purposive sampling method. Sampels were taken at six points with repetitions three times at different times. Sampels taken at two points upstream, two points middle and two points downstream. Samples were analyzed in situ and ex situ. The results showed that the activities that affect water quality physical, chemical, and biological in up, middle and down stream area of Saba River is agricultural activities, livestock, restorant, blacksmith, home stay, residential, workshops, market, laundry and industrial activities. The upstream region until middle region (T1) no parameter exceeded the quality standard, parameters that exceed the quality standard in the middle region (T2) is TSS, BOD, fosfat and fecal coliform, in the downstream which exceeded the parameters in the downstream region (H1) is BOD, fosfat, fecal coliform dan total coliform and in the downstream region (H2) is DO, BOD, COD, fosfat, fecal coliform dan total coliform. Saba River quality status based on the method pollution index in the upstream region (U1) until middle region (T1) showed good condition, middle region (T2) until downstream pollutants classified as mild.

EFFECTIVENESS OF BIOFILTER MADE FROM PLASTIC WASTE TO DECREASE BOD, COD AND AMMONIA OF HOSPITAL WASTEWATER Putu Sri Juniarta; I Wayan Budiarsa Suyasa; IGB Sila Dharma
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 12 No 1 (2018)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

This study aims to determine the influence of biofilter made from plastic waste to decrease BOD, COD and Ammonia content and to determine the efficacy of its use to decrease BOD, COD and Ammonia content from the hospital’s wastewater. This study utilized aerobic biofilter processing through a batch system. Variables used in this research are wastewater processing through biofilter media made from plastic waste and processing without biofilter media, with 36 hours retention time. The parameters are BOD, COD and Ammonia content. From the statistical analysis, the use of biofilter media made from plastic waste gives a significant effect to decrease BOD and Ammonia content but made no significant effect to decrease COD. Plastic waste biofilter processing system is very effective to decrease BOD (84,85%), less effective to decrease COD (31,73%) but effective enough to decrease ammonia (50,60%), meanwhile, the standard quality of plastic waste biofilter processing system is effective to reduce BOD and COD content but not effective to reduce the ammonia content after 36 hours of processing time. Further research is needed to study the efficacy of biofilter media made from other type of plastic waste. Moreover, a combination of anaerob-aerobic biofilter processing is required to improve processing efficacy. Keywords: biofilter; plastic waste; hospital wastewater; BOD; COD; ammonia

KAJIAN DAERAH TERINTRUSI AIR LAUT DI WILAYAH PESISIR KECAMATAN KUTA UTARA, KABUPATEN BADUNG I Made Sukearsana; I Gusti Bagus Sila Dharma; I Wayan Nuarsa
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 9 No 2 (2015)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

The total population of District Kuta Utara 2014 recorded 68.422 people with an average population density of 2,021 people/km2 while the number of tourism accommodation facilities (hotels, villas, restaurants) recorded 399 pieces. The rapid of population growth and the development of tourism accommodation facilities require ground water more increasing. Intake of large amounts of ground water potential to cause pollution/ sea water intrusion. This study aims to determine the quality of the groundwater, knowing distribution maps sea water intrusion and to predict the level of sea water intrusion coming years. This research method uses descriptive quantitative method. Furthermore, to determine the quantity and quality of ground water was measured groundwater levels and analysis of the parameters of temperature, total dissolved solid, pH, chloride, hardness and electrical conductivity of the 60 sample wells. Results of analysis of each of the key parameters that can be mapped and known overlay distribution maps sea water intruded area. The observation of the quantity and quality of groundwater in coastal areas of Kuta Utara subdistrict shows the range of the depth of the ground water level between -5.15 meters to -22.16 meters. Results of the analysis of ground water quality of the 60 groundwater samples showed that there has been a decline in the quality of ground water is as much as 14 samples total dissolved solid (TDS) the highest reaches 1,122 mg/ l, the highest electrical conductivity reached 1,677 ìMhos / cm and the highest chloride reached 532, 5 mg/l. Distribution maps sea water intruded area shows that in coastal areas troubled district of Kuta Utara indicated seawater intrusion, especially in the area of Petitenget and Batubelig, Kerobokan Kelod Village area of 78.44 Ha. Prediction of sea water intrusion in 2022 was highest in the area of tourism accommodation caused by ground water extraction enough much, kind of gray-brown soil regosol has a rough texture and high permeability characteristics so it is easy to pass groundwater.

Daya Tampung Beban Pencemar Sungai Badung di Desa Dauh Puri Kota Denpasar dengan Model QUAL2KW dody setiawan; I G B Sila Dharma; I Wayan Budiarsa Suyasa
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 11 No 2 (2017)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Badung River is flow through two regencies of Badung and Denpasar that has 25.17 km length. People actually use Badung River for tourism, irrigation, drainage system and as the exile of wastewater from all activities along the river. The water quality of Badung River has exceeded the threshold limits.Therefore, It is needed to determinate the carrying capacity of Badung river. Because of the pollution, the water quality has degraded. The objective of this research is knowing the sources of pollution and load capacity of Badung river at Dauh Puri village using Qual2kw model, to define that amount of pollutant that are allowed to exile in Badung River. The water quality parameter that analyzed is BOD, COD, and TSS. This research divided into three segments, and four scenarios of simulations to know allowed loading rate of pollutant along the river. The callculates and allocate pollutant reduction levels necessary to meet approved water quality standards. The result of simulation using Qual2kw showing that BOD has over its limit, meanwhile for COD parameter, the loading rate is between 536,21 to 1360,32 kg/day and TSS loading rate between 2235,92 to 4252,90 kg/day. Keywords: Badung River, Qual2KW 5.1, Loads Capacity, Water Quality

RELATIONSHIP BETWEEN CHLOROPHYLL-A AND SEA SURFACE TEMPERATUR WITH Sardinella lemuru CATCHING IN BALI STRAIT Niken Gustantia; Takahiro Osawa; I Gusti Bagus Sila Dharma; Wayan Sandi Adnyana
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 15 No 1 (2021)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/EJES.2021.v15.i01.p02

The Bali Strait is one of Indonesia's territorial waters that have high natural resource potential. The area is only about 2,500 km2 but has a high potential fishing ground. The Bali Strait has unique and dynamic waters that can cause fluctuations in fish production amount each year. The largest type of fish caught in the Bali Strait is lemuru (Sardinella lemuru), a fish found only in the Bali Strait. This fish plays a significant role in the economy of fishers in the Bali Strait. Each year the catch of lemuru has fluctuated, making fishing locations challenging to predict. Sea Surface Temperature (SST) and Chlorophyll-a (Chl-a) are oceanographic parameters that can affect the resources of the ocean. Oceanographic phenomena, such as upwelling, can also influence the condition of fish resources. Therefore, understanding the relationships between these factors is essential in practical fisheries management. Observation of oceanographic factors is very hard with the field observation due to time and cost limitations. The remote sensing technique is an efficient method to determine SST distributions and Chl-a concentrations using satellite imagery. This study analyzes SST and Chl-a concentration in the Bali Strait using the Global Change Observation Mission(GCOM-C) satellite and determines the correlation between Chl-a and SST with a total fish catch(lemuru) during 2019. The results showed the maximum average Chl-a concentration observed on August 1.62 mg/m3 and the lowest concentration observed on January 0.45 mg/m3, the maximum SST on March was 28.12° C, and on August (Dry season) with 22.40° C. The SST variable's influence provides a negative correlation (R = -0.209) with changes in lemuru catch, while the Chl-a parameter has a positive correlation (R = 0.375) with changes in the catch. The pattern of relationship between Chl-a with fish catching had a good relationship than the SST in 2019.Keywords: Bali Strait; Sardinella lemuru; SST; Chl-a.

Co-Authors A.P.W.K. Dewi Abd. Rahman As-syakur Adi Prasetyo Afip, Fahmi Anis Andrianus Sembiring Astria Yusmalinda Atmaja, Putu Satya Pratama Boiris Benet Sinaga Budi Santoso Danie Al Malik Dewa Arya Dwiyana dody setiawan E. Faiqoh Elitza Germanov Elizabeth Anastasya Elok Faiqoh Endang Wulandari Suryaningtyas Gede Agus Bawantu Helga Margareta Hunter Hesti Aprianti I B. Suryadmaja I Dewa Anom Agung Dwi Putra Jayantika I Dewa Nym. Nurweda P., I Dewa Nyoman Nurweda Putra I G. Oka Wiradnyana I G. Suryadinata P I Gede Hendrawan I Gusti Agung Gede Bayu Gita Damara I Gusti Bagus Ngurah Adywan Surya Bhuwana I Gusti Ketut Sudipta I Gusti Ngurah Dirgayusa I Gusti Ngurah Putra Dirgayusa I Gusti Putu Ary Wedangga I Ketut Dedi Ariawan I Ketut Suputra I M.S. Darmasetiyawan I Made Mudiasa I Made Sukearsana I NYOMAN MERIT I Nyoman Norken I Putu Dede Charles Dharma Saputra I PUTU GUSTAVE SURYANTARA PARIARTHA I Putu Irpan Aditanaya I W BUDIARSA SUYASA I W Wedana Yasa I Wayan Gede Astawa Karang I Wayan Krisna Eka Putra I Wayan Nuarsa I Wayan Sandi Adnyana I Wayan Suarna I.W. Restu I.W.G.A. Karang I.Y.P. Perwira IDA AYU ASTARINI Ida Bagus Indra Danendra Irma Suryanti Janis Khansa Putri Argeswara Kadek Yudiastuti Karina Santoso M. Sudiana Mahendra Naila Makfiya Nanin Anggaraini Ngakan Putu Purnaditya Ni Kadek Dian Prinasti Ni Luh Gede Widya Bintang Gustavina Ni Luh Kade Paramita Kusuma Ni Luh Putu Ria Puspitha NI LUH WIDYASARI Ni Nyoman Pujianiki Niken Gustantia Pande N Sari Saraswati Paul Helga Fernandez Putra, I Nyoman Giri Putu Desy Darmasusantini Putu Dian Pertiwi Putu Eva Setiawati Putu Sri Juniarta Ratih Permitha Syury Sagung Putri Chandra Astiti Soni Senjaya Efendi Takahiro Osawa Widiastuti Karim Widiastuti Widiastuti Yolla Jessika Yulianto Suteja

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