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Ulung Jantama Wisha
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The Importance of Nutrients Concentration Monitoring In Coastal Area Wisnu Arya Gemilang; Ulung Jantama Wisha; Ruzana Dhiauddin
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 2 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (602.583 KB) | DOI: 10.14710/ik.ijms.24.2.69-80

Abstract

Land utilization changes of the natural resources conservation area of Pangandaran coastal area, that have been utilized as a marine tourism area, which affect many kinds of environmental degradation threats. Updating the condition of Pangandaran waters is essential due to its condition impacted by anthropogenic activities. Water condition monitoring was done by measuring nutrients as an indicator to assess the water fertility and pollution. Fourty five observation points were selected and divided into three locations, representing the condition of river, estuary/mangrove area, and open sea. Nutrients were analyzed by employing Standard Methods for The Examination of Water and Wastewater 22nd Edition 2012 (SMEWW). Currents and tides were measured for 15 days, used as the basis input of hydrodynamic model. The results showed that the highest of average value of nitrate was found in the estuary/mangrove forest which reached 0.998 mg.L-1. While, the highest phosphate content was observed in the river which reached 0.928 mg.L-1. The highest ammonia concentration was observed in the sea which reached 0.027 mg.L-1. N:P ratios in the study area are categorized <16, which showed that Pangandaran waters are in the condition of N-limitation. These conditions trigger blooming of phytoplankton due to the high concentration of nitrate. The higher nutrient concentration indicates that anthropogenic activities take place. Tidal current has an important role transporting nutrient in the estuary, triggering nutrient deposition and blooming tendency. Restrictions on residential areas and the utilization of coastal areas are an appropriate step to reduce the pollution level in Pangandaran waters.
UPAYA KONSERVASI KAPAL KARAM GOSONG NAMBI SEBAGAI BUKTI ADANYA JALUR PERDANGAN MARITIM MASA LALU DI KABUPATEN PESISIR SELATAN, SUMATRA BARAT Ulung Jantama Wisha; Nia Naelul Hasanah Ridwan; Ruzana Dhiauddin; Guntur Adhi Rahmawan; Gunardi Kusumah
AMERTA Vol. 38 No. 1 (2020)
Publisher : Pusat Penelitian Arkeologi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24832/amt.v38i1.63-76

Abstract

Abstract. Conservation Efforts of Gosong Nambi Shipwreck as an Evidence of the Past Maritime Trading Routes in Pesisir Selatan Regency, West Sumatra. The coastal region of West Sumatra has become one of the main trading routes in the 15th-19th centuries so there is no doubt that this area has many archaeological remains both underwater, coastal area, and buried underground. One of the underwater archaeological remains in this region is the discovery of a shipwreck at the Gosong Nambi coral site which is administratively located in Pesisir Selatan Regency, West Sumatra Province in 2015. This study aims to provide an overview of the current condition of the Gosong Nambi Shipwreck site. Research activities include collecting information, searching the shipwreck’s location, recording data, measuring the visible dimensions, and sketching the shipwreck, has been done. Visually, it is a small size vessel which was predicted as a cargo ship from the 1900s that might sail from Bengkulu to West Sumatra and crashed into Gosong Nambi coral (Atoll) and then sank. The shipwreck is partially buried in the sand and piles of the dead coral in the stern and most of the ship’s hull had been looted by scarp metal hunters. Natural factors also trigger site vulnerability so it is advisable to excavate. Conservation efforts are necessary to be done with a CRM approach which can have a positive impact on society on socio-economic aspects without harming any related parties. Abstrak. Wilayah pesisir Sumatra Barat menjadi salah satu jalur perdagangan utama pada abad ke-15-19 sehingga tidak diragukan lagi wilayah ini memiliki banyak tinggalan arkeologis baik yang di bawah air, wilayah pantai, maupun terkubur di bawah tanah. Salah satu tinggalan arkeologi bawah air di wilayah ini adalah temuan kapal karam di situs gugusan karang Gosong Nambi yang secara administratif terletak di Kabupaten Pesisir Selatan, Provinsi Sumatra Barat pada tahun 2015.Tujuan dari penelitian ini adalah untuk memberikan gambaran kondisi terkini situs kapal karam Gosong Nambi. Aktivitas penelitian berupa pengumpulan informasi, pencarian lokasi situs, perekaman data, pengukuran dimensi kapal yang terlihat, dan membuat sketsa kapal, telah dilakukan. Secara visual, kapal tersebut termasuk kapal kecil yang diprediksi sebagai kapal barang dari tahun 1900-an yang mungkin berlayar dari Bengkulu menuju ke Sumatra Barat dan menabrak gugusan karang (atol) Gosong Nambi dan akhirnya tenggelam. Kondisi kapal karam tersebut sebagian terkubur dalam pasir dan tumpukan karang mati pada bagian buritan dan sebagian besar lambung kapal telah dijarah oleh para pemburu besi tua. Faktor alam juga menjadi pemicu kerentanan situs sehingga disarankan untuk melakukan ekskavasi. Upaya konservasi perlu dilakukan dengan pendekatan CRM yang dapat terdampak positif terhadap masyarakat pada aspek sosial ekonomi tanpa merugikan berbagai pihak yang terkait.
Riset Terintegrasi Kondisi Lingkungan Perairan Situs Kapal Tenggelam Ss Aquila di Teluk Ambon, Indonesia Guntur Adhi Rahmawan; Ulung Jantama Wisha; Wisnu Arya Gemilang; Koko Ondara; Nia Naelul Hasanah Ridwan; Gunardi Kusumah
Jurnal Kelautan Nasional Vol 14, No 1 (2019): April
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (717.904 KB) | DOI: 10.15578/jkn.v14i1.6276

Abstract

Situs kapal tenggelam Steam Ship (SS) Aquila atau SS Duke of Sparta merupakan salah satu situs peninggalan arkeologi bawah air yang berada di Teluk Ambon. Saat ini, situs SS Aquila mulai dikenal sebagai salah satu lokasi penyelaman kapal tenggelam oleh para penyelam lokal dan internasional. Lokasi Situs SS Aquila terletak di dalam kawasan terminal pertamina dan berada pada jalur lalu lintas laut. Selain itu, banyaknya muara sungai yang dapat menimbulkan berbagai permasalahan yang berdampak negatif terhadap keberadaan situs tersebut. Penelitian terintegrasi di situs arkeologi bawah air tersebut sangat dibutuhkan untuk mengetahui permasalahan terhadap situs SS Aquila dalam pengembangan potensi wisata di Teluk Ambon. Riset dilakukan secara terintergasi meliputi pendekatan arkeologi laut yaitu kegiatan penyelaman, videografi bawah air, pelaksanaan survei hidro-oseanografi dan pengamatan dengan Side Scan Sonar. Posisi situs SS Aquila berada pada kedalaman 15-35m. Kondisi badan kapal masih cukup utuh di beberapa bagian, namun beberapa bagian kapal telah hancur dan hilang seperti crane, cerobong, dan propeller. Berdasarkan hasil penelitian terintregrasi tersebut, bahwa situs SS Aquila dapat dikembangkan sebagai lokasi wisata selam minat khusus (kapal tenggelam). Akan tetapi, sejumlah upaya untuk pengembangannya perlu dilakukan pengkajian lebih lanjut terhadap nilai historis situs dan tingkat kerentanan kawasan situs. Dalam upaya pelestarian situs SS Aquila direkomendasikan kepada pemerintah setempat untuk memberikan pemahaman tentang pentingnya situs arkeologi laut, dan pelatihan terkait wisata selam kapal tenggelam berkelanjutan kepada pelaku wisata dan masyarakat.
Ekowisata Terintegrasi Situs Kapal Tenggelam di Tidore Kepulauan, Maluku Utara Guntur Adhi Rahmawan; Nia Naelul Hasanah Ridwan; Ulung Jantama Wisha; Ilham Ilham; Wisnu Arya Gemilang; Fitria Wahyu Andriani; Agus Sudaryadi; Irwansyah Irwansyah
Jurnal Kelautan Nasional Vol 16, No 3 (2021): DESEMBER
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1068.523 KB) | DOI: 10.15578/jkn.v16i3.10189

Abstract

Kota Tidore Kepulauan mempunyai sejarah penting dibuktikan dengan adanya peninggalan historis dan arkeologis di darat maupun di bawah air. Ekowisata terintegrasi situs kapal tenggelam dapat dikembangkan dengan konsep wisata sejarah maritim dan arkelogi bawah air yang bertanggungjawab terhadap kelestarian lingkungan perairan, memperhatikan keutuhan budaya setempat, dan memberi manfaat secara ekonomi sehingga dapat meningkatkan pendapatan daerah. Tujuan penelitian adalah untuk mengetahui keberadaan situs kapal tenggelam beserta Benda Muatan Kapal Tenggelam (BMKT) yang dikandungnya, inventarisasi tempat bersejarah di Tidore, serta menilai kesesuaian lingkungan perairan untuk pengembangan ekowisata terintegrasi situs kapal tenggelam di Tidore. Survei arkeologi maritim dilakukan melalui penyelaman SCUBA untuk observasi situs dan mencari BMKT, pemetaan batimetri, dan observasi biota laut. Analisis artefaktual dilakukan untuk mengetahui jenis, umur, tempat asal artefak, dan konteks sejarah maritim. Analisis spasial untuk melihat posisi keletakan situs bawah air di antara tempat bersejarah dilakukan untuk pengembangan Heritage-Trail. Penilaian kualitas air disesuaikan dengan Peraturan Pemerintah No. 22 Tahun 2021 tentang Penyelenggaraan Perlindungan dan Pengelolaan Lingkungan Hidup Lampiran VIII. Berdasarkan hasil survei, ditemukan 2 (dua) situs bawah air yaitu Soasio di kedalaman 10-20m dan Tongowai di kedalaman 38-42m dengan temuan artefak keramik China masa Dinasti Ming abad 16 Masehi, guci gerabah yang diduga produksi Singburi, Thailand, dan meriam Portugis produksi Macao. Nilai parameter kualitas perairan situs sesuai dengan standar baku mutu perairan untuk wisata bahari dan biota laut. Temuan situs dan BMKT di Soasio dan Tongowai memperkuat bukti pentingnya Tidore di Jalur Rempah dan Sutra Laut dan dapat dimanfaatkan untuk ekowisata sejarah situs kapal tenggelam yang terintegrasi dengan lingkungan perairannya dan juga dengan destinasi wisata sejarah lainnya di Tidore Kepulauan.
Assessing Mandeh Region as the Center of Marine Ecotourism in West Sumatra Province, Indonesia: Mass Tourism Issue and Vulnerability Aspects Ulung Jantama Wisha; Try Al Tanto; Nia Naelul Hasanah Ridwan; Guntur Adhi Rahmawan; Ruzana Dhiauddin; Koko Ondara; Wisnu Arya Gemilang
Jurnal Segara Vol 17, No 2 (2021): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (712.702 KB) | DOI: 10.15578/segara.v17i2.9459

Abstract

Nowadays, Mandeh Region has developed significantly as the center of marine ecotourism in West Sumatra Province. Many local and international tourists were visiting this site. Due to those conditions, many threats emerged, such as mass tourism evoking damages and pollutions. This study aimed to examine the feasibility of the Mandeh Region for tourism activity and identify the impacts of mass tourism. A direct survey has been conducted. We assessed water quality, accessibility, and social conflicts using a scoring method. A modified matrix categorizing some parameters as the underlying data for marine tourism sustainability was used. We also developed Smartline and CVI model to assess the vulnerability level along Mandeh coastal bay. Local zonation was recommended to reduce more environmental damages. We examined the feasibility of the Mandeh region as a place for ecotourism that reached 71.12 %, indicating this area is sufficiently feasible. The absence of local regulations before the Mandeh region was established as the center of marine ecotourism resulted in mass tourism phenomena that elevated marine litter accumulation. Moreover, the development of many resorts near the coast has recently played a role in triggering pollution and damage. Advanced regulation and management are necessary to diminish negative impacts on both the environment and society.
Hydrodynamics Sabang Bay and Its Influence on Near Shore Sediment Transport, Weh Island, Indonesia Ulung Jantama Wisha; Ilham Ilham
Jurnal Segara Vol 16, No 2 (2020): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1099.188 KB) | DOI: 10.15578/segara.v16i2.8980

Abstract

Sabang Bay is one of the significant areas in Weh Island that becomes a center of marine tourism. Recently, massive urban development in coastal areas impacts on the increase of marine pollution and sedimentation issues within the bay. This study aimed to determine tidal current patterns and their influence on evoking sedimentation within the bay. An Acoustic Doppler Current Profiler (ADCP) was installed within the bay for 30 days, which recorded surface elevation, waves, and sea currents. The numerical hydrodynamic model was developed to figure tidal current features out, validated using field observation data. Sediment transport along the coast was determined by comparing the sediment transport and wave energy component in the form of flux equation. Tidal current speed ranging from 0-0.2 m/s moves predominantly southeastward and northwestward during flood and ebb tides, respectively. Significant wave height (Hs) ranges from 0.18-1 m with a period span of 3.5 seconds propagates toward within the bay, resulting in enhanced sedimentation within the gulf caused by the wave-induced scour and turbulence. Sediment budget transported within the bay reaches 1,586.18 m3/year proving that the sediment movement remarkably occurs within the bay wherein the concentration of suspended sediment ranges from 5-35 mg/L and 2-25 mg/L during the high tidal and low tidal conditions, respectively. Scour and turbulence events induced by internal solitary waves generated from the Andaman Sea result in increased coarse-sized sediment deposition when the flood tide occurs. While, during ebb tide, the widespread distribution of suspended sediment will occur over the bay.  
Estimation of Sediment Distribution Based on Bathymetry Alteration (2014-2016) in the Inner Bay of Ambon, Maluku, Indonesia Guntur Adhi Rahmawan; Wisnu Arya Gemilang; Ulung Jantama Wisha; Ruzana Dhiauddin; Koko Ondara
Jurnal Segara Vol 15, No 2 (2019): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1370.579 KB) | DOI: 10.15578/segara.v15i2.6956

Abstract

The development of Ambon city is centered around Ambon Bay. As the major area of marine and social activities, changes occurred directly affect to seawater degradation. Sedimentation is the main issue that has been occurring. Marine ecosystem can be potentially hampered by the high rate of sedimentation in the Inner Bay of Ambon (TAD). This study aimed to determine the distribution of sediment volume within the bay. Bathymetry of TAD was surveyed using transducer (Echosounder Echo track CVM Teledyne Odom Hydrographic Single Beam), which the depth of certain position was connected to GPS to record all the position data accurately. The field data are then analyzed spatially modelled in the form of 2D and 3D maps, overlaid with the past bathymetry data to calculate the bathymetry alteration and sediment volume estimation during 2014-2016. The depth of TAD in 2014 ranged between 0 - -42 meters, while, in 2016 the water depth slightly changed to 0 – -44 meters. The reduction of the water depth is observed in the 25 – 125 m from shoreline, where the bed thickness changes observed ranging from 0.1 - 1.4 m. Total volume of sediment augmentation reaches 13,236,182 m3 that covers about 67.67 Ha. Tidal current, that ranged averagely from 0-1.2 m/s, has a tremendous influence on sediment transport in TAD. The bay mouth, that is a semi-enclosed enclosed area, triggers sediment accumulation due to the weak tidal current transport. If ongoing, these conditions may endanger the environment and biota survival ability.
Co-Authors Agus Sudaryadi Fitria Wahyu Andriani Gunardi Kusumah Gunardi Kusumah Guntur Adhi Rahmawan Guntur Adhi Rahmawan Guntur adhi Rahmawan Guntur Adhi Rahmawan Ilham . Ilham Ilham Irwansyah Irwansyah Koko Ondara Koko Ondara Nia Naelul Hasanah Ridwan Nia Naelul Hasanah Ridwan Ruzana Dhiauddin Ruzana Dhiauddin Try Al Tanto Wisnu Arya Gemilang Wisnu Arya Gemilang