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All Journal Agrotrop : Journal on Agriculture Science AGRITROP International Journal of Biosciences and Biotechnology Ecotrophic, Journal of Environmental Science INTERNATIONAL JOURNAL OF ENVIRONMENT AND GEOSCIENCES

I NYOMAN MERIT

Fakultar Pertanian Universitas Udayana Bali

Author-ID : 2950161

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science

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Adaptive Governance System through Multi-Stakeholder Partnerships for Natural Resource Conservation in Serangan Island, Denpasar City Chori Amelia; Syamsul Alam Paturusi; I Nyoman Merit
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 13 No 1 (2019)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

This research aims to understand environmental partnerships that have built in Serangan Island, Denpasar, to understand the governance systems based on environmental partnerships in Serangan Island, Denpasar, and analyze adaptive capacity of those governance systems to changes in socioeconomic and environmental conditions in Serangan Island, Denpasar. This research is conducted in the settlements and tourism areas outside the BTID tourism area in Serangan Island, Denpasar, on December 2018 until Februari 2019, using qualitative approach is used through indepth interviews to sixteen informans, which have particular roles in natural resource conservation in Serangan Island, Denpasar, which include conservation and utilization of turtles, coral reefs, sea biota, and many types of governance and partnerships in Serangan Island. Result shows that the government and business partnerships were initiated from provision of tourism infrastructure which was developed into wider partnerships with NGOs and communities in the area of turtle conservation, while collaborative governance in the shape of community-based coastal resources management in Serangan Island. Meanwhile, adaptive co-management was developed through devolution of partial responsibility of turtle’s conservation and utilization to local communities through various deals and MoUs. Result also shows that adaptive capacity of Serangan Islanders has developed towards resilience to changes of environmental and socioeconomic conditions. Two recommendations are advised to natural resource managers in Serangan Island. Firstly, robust data collection and supervision systems needs to be developed for governance of turtles, coral reefs, and sea biota. Secondly, social learning through dialogue, reflexions, and evaluation needs to be implemented to reassess the outdated governance practices.

STUDI PERESAPAN AIR HUJAN DI KOTA DENPASAR I Ketut Suharta; Nyoman Merit; Nyoman Sunarta
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 3 No 2
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (114.091 KB)

The first aim of this research is to know the capacity of infiltration and the capacity of percolation in the area ofDenpasar city. The second things is to know how much the water of rainfall potential to be infiltrated in Denpasar city.Capacity of infiltration and capacity of percolation tested by using the double ring infiltrometer with innercylinder diameter is 30 cm and outer cylinder is 50 cm. Volume of potential infiltrated rain water calculated bymultiplied the rainfall by catchment area and coefficient of infiltration.The findings show that the capacity of infiltration is about 0.05 mm/hour to 0.211 mm/hour, and the capacity ofpercolation is about 0.125 mm/hour to 0.471 mm/hour. Potential volume of infiltration of rain water is 25,405,028.77m3/year, it mean that about 10 % of total rainfall volume, 252,560,182.68 m3/year, so about 227,155,153.91 m3/year willbe a potential to increasing the surface run off.Based on the findings the following suggestions can be made: (1) further research should be done with the dept ofpercolation test should be about 2 m, and 20 cm above the water table; (2) it is necessary to infiltrate rainwater alltogether by the community of the city of Denpasar, by using a hole of 2 m3 each 100 m2 area.

PREDIKSI EROSI, KLASIFIKASI KEMAMPUAN LAHAN DAN ARAHAN PENGGUNAAN LAHAN DI KECAMATAN BATURITI KABUPATEN TABANAN PROVINSI BALI I Wayan Suarsana; I Nyoman Merit; I Wayan Sandi Adnyana
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 10 No 2 (2016)
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.2016.v10.i02.p11

Land resource damage caused by the land conversion and land use without regard to principles of conservation of soil and water. The damage resulted in the erosion is very high. Changes in land use without regard to principles of conservation of soil and water is currently happening in Baturiti District. Given this research can determine the level of erosion, soil and water conservation planning, land capability classification and proposed land use in Baturiti District. Erosion prediction using USLE (Universal Soil Loss Equation) to estimate the rate of erosion and also to get an idea the determination of soil and water conservation measures appropriate to the region. Determination of the land capability classification method Arsyad (1989) is by classifying land capability to classify land capability class based on the value of the limiting factor of land that is adjusted with land capability classification criteria. Determining of the proposed land use using the scoring method by combining the slope factor of the field, the soil sensitivity of the against erosion and the intensity of daily rainfall. Soil sampling is done by taking a total of 19 soil samples from a unit of land. The prediction results on each unit of land erosion in the area showed the level of erosion is very light covering an area of 11,70 ha, mild erosion area of 5.221,56 ha, erosion was an area of 88,10 ha, severe erosion area of 616.20 ha and very severe erosion area of 2.195,39 ha. Soil and water conservation measures required on land units with erosion prediction value exceeds the value erosion that can be tolerated so that the value could be below the value erosion erosion can be tolerated. Capability classification of the land in the study area consists of land capability class II with an area of 1489,39 ha, class III area of 827,39 ha, class IV with an area of 830.15 ha, class VI area of 1.373,79 ha, class VII covering 1.453,92 ha, class VIII covering an area of 2.176,31 ha. Tutorial use of land for the forest department is directed to the protected forest area covering an area of 2.458,00 ha. Tutorial use of land outside the forest area to protected area 1079.81 ha (13,27%), a buffer zone covering an area of 1.662,31 ha, annual crop cultivation area covering an area of 844.86 ha and seasonal crops cultivation area covering an area of 2.087,97 ha.

ESTIMASI KANDUNGAN KARBON ATAS PERMUKAAN TANAH PADA HUTAN ALAM DAN HUTAN REHABILITASI MANGROVE TAMAN HUTAN RAYA NGURAH RAI BALI Made Suartana; I Nyoman Merit; I Made Sudarma
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 15 No 2 (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.i02.p07

Mangroves are ecosystems that play an important role in absorbing and storing carbon from the air, one of which is in the form of mangrove vegetation biomass. As the largest mangrove area in Bali which consists of natural and rehabilitation vegetation, Taman Hutan Raya Ngurah Rai has a large potential for high carbon content. To determine the carbon potential of mangroves in natural and rehabilitation forests, a research was conducted using the purposive sampling method based on the canopy density level which was divided into 5 categories, namely very rare, rare, moderate, dense, very dense. Based on the results of measurements and calculations, the total carbon content of Ngurah Rai Grand Forest Park is 86.521,74 tons C, consisting of natural forest content 66.857,53 tons C and rehabilitation forest 19.664,21 tons C. Above ground carbon per hectare in natural forest was not significantly different from the above ground carbon per hectare in rehabilitation forest, these results indicate that the carbon content per hectare of rehabilitation forest over 20 years old is almost close to the carbon content per hectare in natural forest. The diameter of trees and vegetation types did not significantly affect the carbon content of mangroves, these results indicate that the increase in carbon stocks in each type of vegetation in natural and rehabilitation forests is in line with diameter growth. Keywords: Biomass; Density; Diameter; Canopy.

LAND SUBSIDENCE IN SEMARANG SUPRABADEVI A.S.; Takahiro Osawa; I Nyoman Merit
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 7 No 2 (2012)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1074.732 KB)

This research aims to identify monitoring land subsidence in Semarang has been done using raster data operation of the DEM in GIS environment. Digital representation of relief of Semarang area was generated from a point map which contains elevation data. The last update of the elevation data was made using geodetic, using Global Positioning System (GPS). Decrease in land distribution is estimated from the data of GPS Geodetic years 2008-2011, in the Semarang area north, west, central, east and south. Reduction in the range of 2008-2009 reached -12.4 cm, then increased in 2009-2010 to be -20-4 cm and -10.5 cm fell back to the years 2010-2011. Decline in the face of the land in Hyderabad occurs mainly in the n01th, east, central and south of Semarang. Subsidence causing damage to infrastmcture, buildings, and results in moving tidal lowlands.damage potential economic loss is cracks in buildings and infrastmcture (roads and bridges), the number of homes that have been tilted and nearly drowned. In addition to direct losses, reduction in ground level also cause indirect losses that rob the increasingly widespread flooding in the northern region of Semarang.in 2008- 2010 June-July with a high tide occurs o.6 cm from the surface of the sea water in the area of Semarang.

ANALISIS PERUBAHAN PENGGUNAAN LAHAN DAN DAMPAKNYA TERHADAP HASIL AIR DI DAS CISADANE HULU Nilda Nilda; I Wayan Sandi Adnyana; I Nyoman Merit
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 9 No 1 (2015)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Air merupakan salah satu kebutuhan dasar yang sangat penting bagi manusia. Terdapat beberapa faktor utama penyebab perubahan sumber daya air, diantaranya adalah perubahan penutupandan pengelolaan lahan yang meningkatkan kekedapan lahan.Salah satu tujuan pengelolaan DAS adalah mencapai kondisi tata air optimal yang dapat dikenali dari sifat aliran sungai. Penelitian ini bertujuan untuk: (1) mengetahui distribusi perubahan penggunaan lahan yang terjadi di wilayah DAS Cisadane Hulu dari tahun 2003 sampai 2010; (2) mengetahui perubahan hasil air akibat distribusi perubahan penggunaan lahan. Daerah kajian penelitian adalah DAS Cisadane Hulu dengan luasan sekitar 22.288,01 ha. Penelitian dilakukan melalui dua tahap yaitu analisis perubahan penggnaan lahan dan prediksi aliran dengan model HEC-HMS. Dalam penelitian ini digunakan peta pengunaan lahan dari BIG (Badan Informasi Geospasial) tahun 2003 dan Peta Penggunaan Lahan tahun 2010 hasil interpretasi Citra ALOS. Selanjutnya kedua peta tersebut dianalisis dengan metoda tabel silang (cross tabel) untuk memperoleh data perubahan penggunaan lahan dari setiap kelas penggunaannya. Kedua data series penggunaan lahan ini digunakan sebagai input pada model prediksi debit aliran HEC-HMS. Selanjutnya dibangun juga skenario-skenario untuk melihat dampak perubahan lahan terhadap debit aliran di DAS Cisadane Hulu. Metode bilangan kurva (SCS-CN) dipilih untuk menghitung besar curah hujan efektif, yaitu dari pengurangan curah hujan bruto dengan berbagai bentuk kehilangan air (loss). Transformasi dari curah hujan efektif menjadi hidrograf aliran langsung (direct runoff) diperoleh dengan menggunakan metode hidrograf satuan SCS Curve Number. Selama kurun waktu 2003 – 2010 terjadi perubahan penggunaan lahan di DAS Cisadane Hulu. Luas Hutan bertambah 223,78 ha, pemukiman 214,78 ha, rumput/tanah kosong 85, 73 ha, dan gedung 12, 64 ha. Terjadi penguarangan luas semak belukar 225,64 ha, tegalan/ladang 145,92 ha, sawah irigasi 124, 92 ha, sawah tadah hujan 30,67 ha, dan kebun/perkebunan 9,92 ha. Hasil dari simulasi dengan menggunakan peta penggunaan lahan tahun 2010 didapatkan nilai debit puncak (Qp) sebesar 81.73 m3/detik. Nilai volume puncak (Vp) sebesar 2,310.7 mm dan Waktu Puncak (Tp) pada hidrograf aliran yang dihasilkan model terjadi pada tanggal 26 Maret 2010. Secara umum terjadi peningkatan debit puncak antara penggunaan lahan tahun 2003 dengan 2010. dari 81.22 m³/detik menjadi 81.73 m³/detik. Naiknya debit puncak disebabkan meningkatnya aliran permukaan akibat perkembangan pemukiman di DAS.Hal ini terlihat dengan meningkatnya nilai CN rata-rata dari 38.5 menjadi 39.4.Pada simulasi dengan penggunaan lahan tahun 2010 didapatkan hasil airsebesar 2.310,7 mm/tahun.Nilai ini lebih kecil dari simulasi dengan penggunaan lahan tahun 2003 yaitu 2.320,1 mm/tahun. Salah satu penyebab berkurangnya hasil air dapat dikarenakan penguapan yang meningkat akibat bertambahnya luasan hutan. (banyaknya pemanfaat air tanah disekitar DAS tersebut, baik legal maupun ilegal).

STRATEGI PENGELOLAAN EFEKTIF EKOSISTEM TERUMBU KARANG DI KAWASAN KONSERVASI NUSA PENIDA I Dewa Kadek Wira Sanjaya; I Nyoman Merit; Ida Ayu Astarini
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 16 No 2 (2022)
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.2022.v16.i02.p01

Nusa Penida MPA was established with the aim to conserving natural resources and ensuring the sustainability of livelihoods. The Government of Indonesia uses the EVIKA tools to assess the effectiveness of MPA management. This study examines the effectiveness of MPA management by looking at indicators of coral reef ecosystem health and resource utilization to develop an effective management strategy using the force filed analysis method. The results showed that the condition of coral and fish biomass in the Nusa Penida MPA experienced a significant increase. Hard coral cover was in the medium category with a cover of 43% and fish biomass of 816.80 kg/ha. The coral reef health index of the Nusa Penida MPA is 5 which indicates that coral cover is in the medium category with high recovery potential and the coral reef fish category is low. Nusa Penida marine resources are used for fisheries, tourism as well as for trade. This study recommends a strategy to increase the effectiveness of Nusa Penida MPA management by investing in increasing human resource capacity in the Bali MPA management unit in competence on monitoring ecosystem and preparing a management budget plan along with efforts to fulfill program budgets. Keywords: Coral Reef, Management; Effective; Nusa Penida; MPA

SPATIAL ANALYSIS OF LANDSLIDE POTENTIAL ON AGRICULTURE IN THE AYUNG WATERSHED, BALI PROVINCE Feronika, Feronika; Osawa, Takahiro; Merit, I Nyoman
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 17 No 2 (2023)
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.2023.v17.i02.p06

The Ayung Watershed is one of the watersheds with mountainous and hilly landscapes with potential landslides. This study aims to determine the potential level of landslide susceptibility and its effect on agricultural land use in the Ayung watershed. The method used to determine the potential for landslides is a weighting/scoring method by overlapping the parameters causing landslides, namely rainfall, slope, land use, landform, geological structure, and soil type. Determining the effect of landslide potential on agricultural land is done by overlapping the landslide potential map with land use. The data used includes BMKG monthly rainfall for 2015-2019, the slope of DEMNAS data for 2020, geological structure and landform 1:25,000 scale RBI map data for 2019, land use using Sentinel 2A data for 2020, and soil types in the form of spatial planning maps Province of Bali 1:25,000 scale in 2019. The results showed that landslides in the Ayung watershed were categorized as low potential to high potential. Classes with no landslide potential are widespread in the upstream and downstream areas of the watershed, covering an area of ??18,976.01 ha (60%), the low potential category covering 5,877.78 ha (19%), the medium potential category covering an area of ??3,208.76 ha (10%) and the low potential category covering an area of ??3,208.76 ha (10%) spread over the upstream and central parts of the watershed covering an area of ??3,528.55 ha (11%). The effect of landslides on agricultural land has a category from no potential to high potential. The category with no potential is widespread in the upstream watershed area of ??13,268.57 ha (66%), the low potential category is 3,268.57 ha (16%), the medium potential category is 1,782.31 ha (9%), and the high category is spread in the upstream and the middle of the watershed area of ??1,707.28 ha (9%). Keywords: Landslide; Watershed; Mapping; Agricultural land

Co-Authors Chori Amelia Clara Rosy Irawati CoK.I.M. HANDAYANI Feronika, Feronika GALIH INDRAWATI I Dewa Kadek Wira Sanjaya I Gusti Agung Lanang Widyantara I Gusti Bagus Sila Dharma I Ketut Suharta I MADE SUDARMA I Nyoman Dibia I NYOMAN SUNARTA I Wayan Arthana I WAYAN NARKA I Wayan Sandi Adnyana I Wayan Suarna I Wayan Suarsana IDA AYU ASTARINI IDA BAGUS PUTU BHAYUNAGIRI IGAG SWANDANA INDAYATI LANYA Karsun Karsun Made Antara Made Suartana Ni Made Ayu Ratna Sari NI MADE TRIGUNASIH Nilda Nilda Nuranita Naningsi Nyoman Sunarta Putu Desy Darmasusantini SATRIA WAHYU 0ETOM0 Sulastri Sulastri SUPRABADEVI A.S. Syamsul Alam Paturusi Takahiro Osawa Takahiro Osawa Takahiro Osawa TATIEK KUSMAWATI WIYANTI WIYANTI

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