The change in land use and land cover in upstream watersheds will change the features of drainage systems such that they will impact surface overflow and affect the infiltration capacity of a land surface, which is one of the factors that contributes to flooding. The key objective of this study is to identify vulnerable areas of flooding and to assess the causes of flooding using ground-based measurement, remote sensing data, and GIS-based flood risk mapping approaches for the flood hazard mapping of the Teunom watershed. The purposes of this investigation were to: (1) examine the level and characteristics of land use and land cover changes that occurred in the area between 2009 and 2019; (2) determine the impact of land use and land cover changes on the water overflow and infiltration capacity; and (3) produce flood risk maps for the Teunom sub-district. Landsat imagery of 2009, 2013, and 2019; slope maps; and field measurement soil characteristics data were utilized for this study. The results show a significant increase in the use of residential land, open land, rice fields, and wetlands (water bodies) and different infiltration rates that contribute to the variation of flood zone hazards. The Teunom watershed has a high and very high risk of ~11.98% of the total area, a moderate risk of 56.24%, and a low and very low risk of ~31.79%. The Teunom watershed generally has a high flood risk, with a total of ~68% of the area (moderate to very high risk). There was a substantial reduction in forest land, agricultural land, and shrubs from 2009 to 2019. Therefore, the segmentation of flood-risk zones is essential for preparation in the region. The study offers basic information about flood hazard areas for central governments, local governments, NGOs, and communities to intervene in preparedness, responses, and flood mitigation and recovery processes, respectively.

No abstract

Panglima Laot was indigenous institutions of Aceh that hand to realize sustainable fisheries management particularly with an ecosystem approach. The objective of this study is to evaluated status of Panglima Laot on fisheries management based on ecosystem approach. This research was conducted in 2017 in Banda Aceh City. Data analysis used Composite index with multy criteria analysis and then visualized by flag modelling. The result of this study showed Panglima Laot status was ‘good’ category. Composite value of Lhok Pasie Tibang Panglima Laot is 66,6, Lhok Kuala Aceh Panglima Laot 62,5 and Lhok Kuala Cangkoi Panglima Laot 72,6.

The existence of fish aggregating devices (FADs) in a waters is able to establish a new fishing ground that potential waters. FADs are able to attract the attention of the gathering of fishes and other aquayic organisms around it, increasing the density of fish around FADs can increase the chances of successful catching operation, and therefore the FADs has benefited significantly to increase the capture fishery production significantly. The purposes of the research were to evaluate the catching composition of purse seine production  using FADs and non FADs, and to examine the fectiveness of FADs. This research was conducted on February 1 - 28, 2018 located at Pusong Waters, Lhokseumawe City. The survey  method was used in this study. The direct sampling by following the fisherman in fishing activities was performed both the purse seine with FADs and no FADs. Total purse seine catches during the research were 4,320 kg consisting of Long Jawed Mackerel (Rastrelliger sp.) 1,280 kg (29.63%), Decapterus Fish ( Decapterus sp.) 350 kg (8,107%), skipjack tuna (Katsuwonus pelamis) 845 kg (19.56 %), tuna fish (Euthynnus affinis) 720 kg (16.67%), Torpedo scad (Megalaspis cordyla) 300 kg (6.94%), Queenfish 140 kg (3.24%), and starry triggerfish (Abalistes stellaris) 685 kg (15.86%). It was concluded that the purse seine used FADs is more effective  compared to the a purse seine that does not use FADs.Keberadaan rumpon di suatu perairan mampu menarik perhatian berkumpulnya ikan dan organisme lain disekitarnya, sehingga dapat meningkatkan hasil tangkapan ikan. Penelitian ini bertujuan untuk menganalisis komposisi hasil tangkapan purse seine yang menggunakan rumpon dan purse seine yang tidak menggunakan rumpon, dan menilai efektivitas rumpon dalam mengumpulkan ikan. Penelitian ini dilaksanakan pada 01 - 28 Februari 2018 bertempat di Perairan Pusong, Kota Lhokseumawe. Metode penelitian yang digunakan adalah metode survei, yaitu dengan mengikuti nelayan dalam kegiatan penangkapan ikan, baik nelayan purse seine yang menggunakan rumpon dan nelayan purse seine yang tidak menggunakan rumpon. Data ikan hasil tangkapan yang diperoleh dihitung jumlah ikan hasil tangkapan dan diidentifikasi spesies ikan dan selanjutnya dibandingkan dengan hasil tangkapan nelayan yang menggunakan rumpon dan ikan hasil tangkapan nelayan yang tidak menggunakan rumpon. Total hasil tangkapan purse seine selama penelitian sebanyak 4.320 kg terdiri dari kembung (Rastrelliger sp.) 1.280 kg (29,63%), layang (Decapterus sp.) 350 kg (8,107%), cakalang (Katsuwonus pelamis) 845 kg (19,56%), tongkol (Euthynnus affinis) 720 kg (16,67 %), tegang ekor/tetengkek (Megalaspis cordyla) 300 kg (6,94 %), talang/daun bamboo (Scomberoides lysan) 140 kg (3,24%), dan ayam-ayam (Abalistes stellaris) 685 kg (15,86 %).  Dari kedua jenis kegiatan penangkapan ikan tersebut, maka purse seine menggunakan rumpon lebih efektif dibandingkan purse seine yang tidak menggunakan rumpon sebagai daerah penangkapan ikan.

To purpose of this study is to construct folding trap that give the highest captures and to prove cover is able to increases lobster catches. This research is carried out in the laboratorium using experimental design. One folding or standar folding trap (BS) and 2 modified construction trap are modified. Modified traps consist of modified folding trap 1 (BM-1) and modified folding trap 2 (BM-2) which take a cubical shape with dimention of 50×33×18 (l×w×h) (cm). BS entrance take a narrow slit-shaped while BM-1 and BM-2 is four rectangle with 33×6 (l×h) (cm) equipped with row of bars. Three traps and 20 lobsters are put in a water tank. Traps are lifted after immersed for 30 minutes. The activities of the lobster are observed and the numbers of lobster are counted. The catch experiments are carried out as much as 20 repeatation. The influences that produce the higest catch are also tasted. The result show that BM-2 capture 470 individuals more than BM-1 (221 individuals) and BS (109 individuals). The use of the cover will produce 227 individuals and without cover only 123 individuals.Keyword: collapsible traps, lobster, modification, trajectory ABSTRAKTujuan dari penelitian ini adalah mendapatkan konstruksi bubu lipat yang memberikan jumlah tangkapan lobster terbanyak dan membuktikan bahwa tutupan dapat meningkatkan jumlah tangkapan lobster. Penelitian dilakukan di laboratorium menggunakan metode percobaan. Satu bubu lipat nelayan atau bubu lipat standar (BS) dan 2 konstruksi bubu yang dimodifikasi dibandingkan. Bubu modifikasi terdiri atas bubu lipat modifikasi 1 (BM-1) dan bubu lipat modifikasi 2 (BM-2). Ketiga bubu berbentuk balok dengan dimensi 50 × 33 × 18 (p × l × t) (cm). Celah masuk BS berbentuk celah sempit, sedangkan BM-1 dan BM-2 adalah 4 persegi panjang dengan ukuran 33 × 6 (p × t) (cm) yang dilengkapi dengan deretan jeruji besi. Dalam penelitian ini, ketiga bubu dan 20 lobster dimasukkan ke dalam tangki air. Bubu diangkat setelah direndam selama 30 menit. Aktivitas lobster diamati dan jumlah lobster yang terperangkap dihitung. Ujicoba penangkapan lobster dilakukan sebanyak 20 ulangan. Pengaruh tutupan pada bubu yang menghasilkan tangkapan terbanyak juga diujicoba. Hasilnya menunjukkan bahwa BM-2 menangkap 470 individu, atau lebih banyak dibandingkan dengan BM-1 (221 individu), dan BS (109 individu). Penggunaan tutupan menghasilkan jumlah tangkapan sebanyak 227 individu, sedangkan tanpa tutupan hanya 123 individu.Kata kunci:bubu lipat, lobster, modifikasi, tutupan