9 research outputs found
Analisis Risiko Banjir Rob dan Kerentanan Pesisir di Kabupaten Kepulauan Anambas
No full textStudi difokuskan pada evaluasi risiko banjir rob serta tingkat kerentanan pesisir di Kabupaten Kepulauan Anambas, khususnya di Kecamatan Palmatak dan Kute Siantan. Kajian bertujuan menganalisis tingkat kerentanan dan risiko banjir rob melalui pendekatan integratif yang mencakup aspek sosial, fisik, ekonomi, dan lingkungan, serta menyusun indeks komposit kerentanan sebagai acuan dalam perencanaan mitigasi berbasis komunitas dan strategi adaptasi multipihak. Dilakukan pada 12 desa dengan menggunakan pendekatan pemetaan sosial dan analisis spasial. Data primer diperoleh melalui survei lapangan, kuesioner, dan wawancara, sedangkan data sekunder bersumber dari BPS, BNPB, dan peta Digital Elevation Model (DEM). Analisis risiko dilakukan melalui penerapan pendekatan penilaian risiko berbasis Pedoman Umum Pengkajian Resiko Bencana, dengan mempertimbangkan aspek ancaman, kerentanan, dan kapasitas wilayah. Hasil kajian menunjukkan bahwa banjir rob merupakan ancaman paling dominan dengan skenario terburuk berupa kenaikan muka laut hingga 5–6 meter di atas kondisi normal. Kerentanan sosial tertinggi ditemukan di Desa Tebang (53,02%) dan Ladan (52,75%), sementara kerentanan fisik terbesar tercatat di Desa Piabung dan Putik (100%). Kerentanan ekonomi relatif rendah (0–10%), sedangkan kerentanan lingkungan tertinggi (100%) terdapat di Teluk Bayur, Batu Ampar, Belibak, dan Langir. Secara komposit, indeks kerentanan tertinggi berada di Desa Tebang dan Ladan (57%). Kontribusi penelitian ini terletak pada penyajian peta kerentanan terintegrasi yang menggabungkan aspek sosial, fisik, ekonomi, dan lingkungan di kawasan pulau kecil. Hasil kajian ini dapat dijadikan dasar dalam perencanaan mitigasi berbasis masyarakat serta penyusunan strategi adaptasi multipihak, termasuk pelibatan sektor swasta melalui program CSR, guna memperkuat ketahanan masyarakat pesisir terhadap ancaman banjir rob.Studi difokuskan pada evaluasi risiko banjir rob serta tingkat kerentanan pesisir di Kabupaten Kepulauan Anambas, khususnya di Kecamatan Palmatak dan Kute Siantan. Kajian bertujuan menganalisis tingkat kerentanan dan risiko banjir rob melalui pendekatan integratif yang mencakup aspek sosial, fisik, ekonomi, dan lingkungan, serta menyusun indeks komposit kerentanan sebagai acuan dalam perencanaan mitigasi berbasis komunitas dan strategi adaptasi multipihak. Dilakukan pada 12 desa dengan menggunakan pendekatan pemetaan sosial dan analisis spasial. Data primer diperoleh melalui survei lapangan, kuesioner, dan wawancara, sedangkan data sekunder bersumber dari BPS, BNPB, dan peta Digital Elevation Model (DEM). Analisis risiko dilakukan melalui penerapan pendekatan penilaian risiko berbasis Pedoman Umum Pengkajian Resiko Bencana, dengan mempertimbangkan aspek ancaman, kerentanan, dan kapasitas wilayah. Hasil kajian menunjukkan bahwa banjir rob merupakan ancaman paling dominan dengan skenario terburuk berupa kenaikan muka laut hingga 5–6 meter di atas kondisi normal. Kerentanan sosial tertinggi ditemukan di Desa Tebang (53,02%) dan Ladan (52,75%), sementara kerentanan fisik terbesar tercatat di Desa Piabung dan Putik (100%). Kerentanan ekonomi relatif rendah (0–10%), sedangkan kerentanan lingkungan tertinggi (100%) terdapat di Teluk Bayur, Batu Ampar, Belibak, dan Langir. Secara komposit, indeks kerentanan tertinggi berada di Desa Tebang dan Ladan (57%). Kontribusi penelitian ini terletak pada penyajian peta kerentanan terintegrasi yang menggabungkan aspek sosial, fisik, ekonomi, dan lingkungan di kawasan pulau kecil. Hasil kajian ini dapat dijadikan dasar dalam perencanaan mitigasi berbasis masyarakat serta penyusunan strategi adaptasi multipihak, termasuk pelibatan sektor swasta melalui program CSR, guna memperkuat ketahanan masyarakat pesisir terhadap ancaman banjir rob
KAPASITAS ASIMILASI BEBAN PENCEMARAN DI PERAIRAN TELUK RIAU
No full textRiau bay, Tanjungpinang City has been subject for domestic wastes contamination due to the high number of population living in the coastal area. This study aims to determine water quality condition including the pollutant load and the level of assimilation capacity in Riau bay waters. Using a survey method by purposive sampling strategy, the research was conducted by analyzing several physic-chemicals parameters. The results showed the measured physical parameters was still below the threshold level stipulating Minister Decree No. No 51 of 2004. Pollutant loads represented by BOD5, TSS and ammonia were 12,71 mg/L, 239,95 mg/L and 5,33 mg/L respectiely. Our finding showed the assimilation capacity level for BOD5, TSS and ammonia were 159,26 ton/year, 530,98 ton/year and 0,86 ton/year, respectively
Biological pollution potential in the water of Bintan-Riau Islands Province, Indonesia: First appearance of harmful algal bloom species
No full textThe increased number of human population in coastal areas can be the common dominator of an event of harmful algal blooms (HABs), which might be of a negative impact on human activities. Generally, HABs occur due to the dynamics of some phytoplankton species. The objective of this study was to inventory the phytoplankton distribution in the water of Bintan-Riau Island in Indonesia. In the perspective of the pollution biology mitigation, phytoplankton samples were collected from 4 to 5 composited sub-samples of the seven sites around the Bintan water (Dompak, Kijang, Kampung Baru, Lobam, Trikora, Tanjung Unggat and Senggiling). The investigation revealed the presence of 41 phytoplankton taxa. Bacillariophyta was the dominant group of phytoplankton in the coastal waters of the Bintan Island. The highest abundance of phytoplankton is found in the Dompak and Senggiling waters with the number of phytoplankton per mL reached 1.846.667 and 2.050.667 cells/mL, respectively. Both stations had the highest number of phytoplankton species (26 species) compared to other stations. The harmful phytoplankton group found was dinophyceae (genus Ceratium), which was observed in almost all the coastal waters of Bintan Island. The highest abundance of dinophyceae was in the waters of Kampung Baru, Lagoi. In this study, HABs proliferation was associated with nitrate concentration, which recorded high values in all the observation sites. An eutrophication study is needed to understand the broader complexity of nutrient effects governing the occurrence of HABs in the coastal areas, which can help in the mitigation of problems caused by HABs, particularly in Dompak and Senggiling stations. Keywords: Bintan Island, Phytoplankton, HABs, Ceratium, Bacillariophyta, Eutrophicatio
GLOBAL WARMING DAN PENGARUHNYA TERHADAP KARAKTERISTIK GELOMBANG LAUT DI PANTAI TIMUR PULAU BINTAN YANG DITINJAU DARI PERSPEKTIF KLIMATOLOGI
No full textThe influence of global warming has impact on physics oceanographic conditions such as rising sea surface temperature (SST). Beside that, the increase of temperature will affect to climate change which also increase the global wind speed so it will has implied for future ocean wave height. In this study aims to determine the characteristics of ocean wave at the east coast Bintan Island. Hind casting of ocean wave start by processing sea surface wind by downloaded from European Centre for Medium-Range Weather Forecasts (ECMWF), data will be extracted through Ocean Data View (ODV) and analyzed by using wind rose. The characteristic of wind used for calculation effective fetch length for referred to Sverdrup Munk Bretschneider (SMB) method. Fluctuation of SST will be compared to ocean wave height. Result of this study showed that there were differences in the character of ocean waves on a small scale between 1985-1989 as the year that rising temperature have not yet assumed significantly and 2001-2005 temperature begin increase intensively. The pattern of ocean wave at the east coast Bintan Island effected by seasonal wind that moves periodically with the two highest wind speed from north and south, along with lowest speed is during the transition.Pengaruh global warming berdampak terhadap kondisi oseanografi fisika di laut seperti naiknya suhu permukaan laut (SPL). Selain itu peningkatan suhu juga berpengaruh terhadap perubahan iklim yang akan meningkatkan kecepatan angin global sehingga akan berimplikasi terhadap perubahan ketinggian gelombang laut di masa yang akan datang. Tujuan dari penelitian ini untuk mengetahui karakteristik gelombang pada saat sebelum dan selama global warming di pantai timur Pulau Bintan. Tahap peramalan gelombang dimulai dengan melakukan pengolahan data angin yang diunduh dari European Centre for Medium-Range Weather Forecasts (ECMWF) kemudian data diekstrak melalui Ocean Data View (ODV) dan dianalisis menggunakan Wind Rose. Arah dan kecepatan angin digunakan untuk penentuan fetch efektif dalam peramalan gelombang yang menggunakan metode Sverdrup Munk Bretschneider (SMB). Selanjutnya menganalisis fluktuasi SPL dan mengkomparasi dengan karakter gelombang. Hasil penelitian menunjukan bahwa adanya perbedaan karakter gelombang laut dalam skala kecil antara tahun 1985-1989 sebagai tahun yang diasumsikan belum meningkatnya suhu secara signifikan dan 2001-2005 mulainya peningkatan suhu secara intensif. Pola karakter gelombang di pantai timur Pulau Bintan dipengaruhi oleh arah datangnya angin musiman yang bergerak secara periodik dengan persentase dua puncak tertinggi pada Musim Utara dan Musim Selatan serta persentase terendah pada Musim Peralihan
Characteristic of Sea Waves Southern Batam City waters-Northen Lingga District waters
No full textThe southern Batam City sea and northern of Lingga District sea are often used by fishing locations and shipping traffic from Batam City to Lingga District. Southern of Batam City sea-northen Lingga District sea have uncertain sea wave conditions that can affect the stability of ship traffic. The purpose of this study is to determine characteristic of sea waves along with wind speed and directions. Characteristic analysis of ocean waves using the SPM (Shore Protection Manual) method from wind direction and speed data in 2018. The height of ocean waves in the northen Batam City sea-southern Lingga District during 2018 is 2.59 meters with periods of 8.47 s up to 0.005 m with a period of 0.39 s. The average wave height in 2018 is 0.69 m with sea wave characteristic patterns still following seasonal wind conditions. The highest sea wave height conditions are in the northern season due to the geographical location of the southern Batam City sea-southern Lingga District sea in the Northern Hemisphere
Preliminary Study of Heavy Metal (Zn, Pb, Cr, As, Cu, Cd) Contaminations on Different Soil Level from Post-Mining Bauxite Production for Aquaculture
No full textBauxite production and exploration give negative impact environmental modification and increasing concern pollution of heavy metals. One of an alternative to reduce the negative impact of bauxite post-mining production is by re-utilizing the abandoned bauxite land and necessary exploratory study to obtain the current environmental conditions primarily related to heavy metals in bauxite mining area. Soil and water quality samples from 5 (five) sites based on post-mining activities were used to determine concentration heavy metals of As, Cd, Pb, Zn, Cr, Cu from different soil level. They were also collected for grain size analysis including those of sand and mud percentages along with the mean, and sorting analysis. The mean grain size post-mining bauxite ranged between very fine sand to medium sand and had heterogeneous texture. The coarse grain size percentage increased towards the bottom of the soil. Total heavy metal contents for post-mining bauxite soils are 0,081 ppm, 0,245 to 0,471 ppm and 0,007 ppm for As, Pb and Cd respectively. Heavy metals for Cd, uniformly at every depth from soil level. On the other hand, Pb showed significance pattern, it was indicated every depth from soil level, the concentration of Pb was different
Preliminary Study of Heavy Metal (Zn, Pb, Cr, As, Cu, Cd) Contaminations on Different Soil Level from Post-Mining Bauxite Production for Aquaculture
No full textBauxite production and exploration give negative impact environmental modification and increasing concern pollution of heavy metals. One of an alternative to reduce the negative impact of bauxite post-mining production is by re-utilizing the abandoned bauxite land and necessary exploratory study to obtain the current environmental conditions primarily related to heavy metals in bauxite mining area. Soil and water quality samples from 5 (five) sites based on post-mining activities were used to determine concentration heavy metals of As, Cd, Pb, Zn, Cr, Cu from different soil level. They were also collected for grain size analysis including those of sand and mud percentages along with the mean, and sorting analysis. The mean grain size post-mining bauxite ranged between very fine sand to medium sand and had heterogeneous texture. The coarse grain size percentage increased towards the bottom of the soil. Total heavy metal contents for post-mining bauxite soils are 0,081 ppm, 0,245 to 0,471 ppm and 0,007 ppm for As, Pb and Cd respectively. Heavy metals for Cd, uniformly at every depth from soil level. On the other hand, Pb showed significance pattern, it was indicated every depth from soil level, the concentration of Pb was different
Beach macro-litter monitoring and floating microplastic in a coastal area of Indonesia
No full textInternational audienceQualitative analysis of the structures of the polymers composing floating plastic debris was performed using attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), and the aging of the debris was assessed by measuring carbonyl group formation on the particle surfaces. Plastic material made up > 75% of the 2313 items collected during a three-year survey. The size, shape and color of the microplastic were correlated with the polymer structure. The most abundant plastic materials were polypropylene (68%) and low-density polyethylene (11%), and the predominant colors of the plastics were white, blue and green. Cilacap Bay, Indonesia, was contaminated with microplastic at a concentration of 2.5 mg·m 3. The carbonyl index demonstrated that most of the floating microplastic was only slightly degraded. This study highlights the need to raise environmental awareness through citizen science education and adopting good environmental practices
PENINGKATAN PEMAHAMAN MASYARAKAT MELALUI SOSIALISASI PENGELOLAAN SAMPAH BERBASIS OBSERVASI SAMPAH DI MANGROVE DOMPAK
No full textPermasalahan sampah laut di kawasan pesisir, termasuk ekosistem mangrove di Dompak, semakin memprihatinkan dengan dominasi sampah plastik dan keberadaan mikroplastik. Rendahnya kesadaran masyarakat dalam pengelolaan sampah mendorong perlunya kegiatan sosialisasi yang terarah dan berbasis data lapangan. Kegiatan ini bertujuan untuk meningkatkan pemahaman masyarakat melalui sosialisasi pengelolaan sampah sekaligus melakukan observasi jenis sampah di ekosistem mangrove Dompak. Metode yang digunakan meliputi sosialisasi dengan pre-test dan post-test untuk mengukur perubahan pemahaman masyarakat, serta pengamatan langsung komposisi sampah ukuran makro dan mikro di lokasi penelitian. Hasil uji Wilcoxon menunjukkan adanya perbedaan signifikan antara nilai pre test dan post test, sedangkan uji N-Gain menghasilkan peningkatan pemahaman masyarakat tentang pengelolaan sampah sebesar 66,67% pada kategori sedang. Observasi lapangan memperlihatkan bahwa sampah plastik mendominasi hingga 80% dari total komposisi sampah makro, sedangkan mikroplastik yang terdeteksi pada sedimen didominasi oleh tipe film sebesar 85%. Temuan ini mengindikasikan bahwa sosialisasi yang dilakukan efektif dalam meningkatkan pemahaman masyarakat tentang pengelolaan sampah, namun pencemaran plastik di ekosistem mangrove Dompak masih tinggi sehingga memerlukan tindak lanjut berupa aksi nyata dan penguatan pengelolaan sampah secara berkelanjutan
