Rumah Jurnal Online - Fakultas Sains dan Teknologi UIN Sunan Ampel Surabaya
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Analisis Stabilitas Saddle Dam Best Practice: Pembangunan Bendungan Jatibarang Semarang
Full text linkThe slope of right bank of Jatibarang reservoir has saddle with elevation just 10 m on top of reservoir water level (155 m), therefore, it was worried that the water flow to surrounding area. The Saddle is 200 m in length with top elevation is 162 m to 165 m and 150 in width. The solution of the problem is necessary Saddle Dam construction by using embankment material. Based on geology map in the location is that Saddle Dam laid on kerek formation with soil classification of loam and susceptible for sliding. The existing soil must be changed by good soil properties to guarantee the stability. This study descripts about Saddle Dam stability analysis by using finite element method. The result shows that factor of safety of Saddle Dam is 2.96, therefore Saddle Dam is stable and safe.Lereng reservoir Jatibarang bagian kanan terdapat punggungan dengan elevasi puncak 165 m atau hanya sekitar 10 m di atas muka air puncak (MWL) waduk elevasi 155 m, hal ini dikhawatirkan terjadi limpasan air waduk ke daerah sekitarnya. Panjang punggungan tersebut sekitar 200 m dengan elevasi puncak alami 162 m sampai 165 m dan bentangnya 150 m. Upaya yang dilakukan untuk mengatasi masalah tersebut perlu dibangun Saddle Dam yang terdiri dari embankment material. Berdasarkan peta geologi daerah punggungan merupakan formasi kerek dengan jenis permukaan berupa tanah lempung kelanauan yang rentan terjadi kelongsoran. Agar stabililitas lereng terjaga maka tanah permukaan perlu diganti dengan tanah yang memiliki propertis lebih baik berupa tanah random. Studi ini menjelaskan tentang analisis stabilitas lereng Saddle Damdengan menggunakan metode elemen hingga. Hasil analisis stabilitas lereng diperoleh nilai keamanan FOS 2,96. Hal ini menunjukkan bahwa Saddle Damstabil dan aman
Efektivitas Penggunaan Media Tanam Berbasis Agen Bioteknologi Terhadap Pertumbuhan Tanaman Hias Episcia cupreata
Full text linkPlanting media is the most important aspect for plant growth. However, in fact, agricultural land in Indonesia is of relatively low quality. These factors include nutrient deficits, decreased levels of organic matter, pollution, decreased microbial activity, and salinization/alkalinization. This study aims to determine the effectiveness of the use of planting media based on biotechnology agents on the growth of Episcia cupreata. The method is a quasi-experimental, RAK design (Randomized Block Design) with 6 treatments, 4 treatments. Main data analysis with ANOVA test and DMRT test level 5% and supporting data with correlation analysis. The result shows the effectiveness of using planting media based on biotechnology agents on the growth of Episcia cupreata. The most optimal growth of the number of leaves produced by treatment T1 with an average of 19.75, stem height by treatment T2 with an average of 48 cm, and root length by treatment T2 with an average of 10,27 cm. Physicochemical conditions include soil pH, temperature, air humidity, soil moisture, and light intensity were correlated with the growth of Episcia cupreata
Chromosome Characterization of Brassicaceae Family
Full text linkIndonesia is known as a rich country in various agricultural and plantation products, including vegetables such as mustard, broccoli, cabbage, and cauliflower. However, in its cultivation, the products and demand for vegetables are not offset by an increase in the production quality. One of the efforts to improve and enhance the production quality is to identify and characterize chromosomes of plants which will become the basis for plant breeding activities. The purpose of this study was to characterize the number, form and size of the chromosome in cultivars belonging to the Brassicaceae family. The study was carried out using the modified squash method. Chromosomes were prepared by fixation, maceration, and staining, then the mitotic phases were observed using a microscope and optilab, and analyzed using Image Raster 3. The results showed that mitotic time range and chromosome character of six cultivars of the Brassicaceae family were different. Broccoli ('Chief No. 2 1955' and 'Green Super') and cauliflower ('ILONA' and 'TM 126') had a mitotic time range from 04.00 to 09.00 a.m. with 2n chromosome number = 18. Green mustard (‘Juwita’ and ‘TM Jade’) and white mustard ('Sakata' and 'Shuka-shuka') had a mitotic time range from 03.00 to 08.00 a.m. with 2n chromosome number = 20. White cabbage (‘CR ACE' and 'Sehati F1') had a mitotic time range from 04.00 to 09.00 a.m and red cabbage (‘Scarlet’ and ‘Red Globe’) had a mitotic time range from 09.00 to 10.00 a.m. with 2n chromosome number = 18.
Perancangan Kawasan Pembangkit Listrik Tenaga Sampah (PLTSA) dengan Pendekatan Eco Tech di Sidoarjo
Full text linkDalam 5 tahun mendatang tempat pembuangan akhir Jabon akan penuh jika tidak dilakukan treatment. berdasarkan perhitungan loud count analysis kenaikan input sampah 2% pertahunnya. Ini berdampak buruk karena menimbulkan pencemaran bau, tanah dan air disekitar. Timbulan sampah di saat ini hingga 20 meter lebih, menyebabkan akumulasi gas methane yang mudah meledak. Disebabkan tidak adanya pemprosesan sampah yang masuk. Menanggapi isu tersebut, maka pemerintah Provinsi Jawa Timur berencana membangun pembangkit listrik tenaga sampah. Dilengkapi wisata edukasi dan sanitary landfill untuk pemanenan gas methane. Pembangkit listrik rencananya akan menggunakan spesifikasi Gasification Power Plant dimana cocok diterapkan karena kesesuaian nilai kalor sampah dan mampu memproses semua jenis sampah campur. Pembangkit listrik ini bisa menggantikan sumber energi listrik Indonesia yang saat ini masih menggunakan batu bara yang tidak ramah lingkungan, juga sebagai upaya menggapai target Indonesia menjadi negara zero emisi karbon pada tahun 2050. Pendekatan Arsitektural yang dipakai menggunakan Eco-Tech Design dengan pemahaman konteks teknis mesin dan isu polusi eksisting site sangat dipertimbangkan sehingga dapat melahirkan desain yang menyesuaikan kebutuhan eksisting pengembangan masterplan dan potensi terbaik pemanfaatan site kawasan ini
Keanekaragaman Capung (Odonata) di Aliran Sungai Desa Karangrejo, Kacamatan Garum, Blitar
Full text linkCapung merupakan salah satu bioindikator lingkungan perairan karena habitatnya yang bergantung pada sumber air. Naiad capung menghabiskan hidupnya sebelum menjadi imago dewasa di dalam air. Capung juga berperan sebagai predator alami bagi serangga kecil dan hama tanaman persawahan dan perkebunan. Ekosistem sungai memeiliki vegetasi yang bervariasi dan biota yang beragam serta kondisi lingkungan dan tipe habitat yang bermacam-macam. Tujuan dari penelitian ini adalah untuk mengetahui keanekaragaman capung di aliran sungai Desa Karangrejo, Kecamatan Garum, Kabupaten Blitar. Penelitian dilakukan selama 3 bulan dengan pengulangan sebanyak 3 kali pada tiap pengamatan. Metode pengambilan data menggunakan transek belt dengan menyusuri aliran aliran sungai dan visual day flying dengan mencatat jumlah capung yang terbang. Data yang diperoleh diidentifikasi dan dihitung indeks kenaekaragaman (H’) Shannon-Wiener. Hasil pengamatan didapatkan 29 spesies yang terdiri dari 8 famili. Spesies terbanyak ditemukan individu adalah Pantala flavescens sebanyak 459 individu dan ditemukan satu individu yakni Zyxomma obtusum dan Euphaea variegata. Nilai rata-rata indeks keanekaragaman kawasan tersebut tergolong rendah dengan H’= 1.85, dengan indeks tertinggi H’=2.26 dan terendah H’=1,23
Environmental friendliness of fishing gears in Kranji, Lamongan Regency
Full text linkIncreasing time has made technological advances increase, including in the field of fisheries which has a positive impact on fishing business in Indonesia. Environmentally friendly fishing technology is a fishing gear that does not have a negative impact on the environment. The use of environmentally friendly fishing gear is very important to be applied in the fishing process in certain waters. This study was conducted in Kranji Village, Paciran District, Lamongan Regency. The purpose of this study is to analyse the level of friendliness of fishing gear in Kranji Village, besides the specifications, operating methods, and variety of catches. The research method used survey and in-depth interviews with related parties related to the results of research and the level of friendliness of fishing gear. The weighting determination of the level of environmental friendliness of fishing gear is based on the Food and Agriculture Organization (FAO). The results of this study shows that the purse seine fishing gear, cob nets, gill nets and payang are environmentally friendly fishing gears, while mini trawlers are non-environmentally friendly fishing gear. This indicates that the presence of trawling gear can affect the decline in fishery resources in Kranji, Lamongan Regency
Perencanaan Tempat Pengolahan Sampah 3R (Reduce Reuse Recycle) di Kecamatan Kesamben Kabupaten Jombang
Full text linkThe increase in the amount of waste coupled with the lack of waste management facilities, as well as the lack of knowledge and public awareness in managing waste causes the accumulation of waste to have an impact on environmental pollution. In the Kesamben sub-district, Jombang, there is no waste management facility, so people choose to do open burning, throw garbage on the side of the road, and even throw garbage directly into the river. From these problems, a TPS 3R was planned in Kesamben District. In planning the TPS 3R, population data and population projections, waste generation data, waste composition, waste generation projections and local area HSPK are required. Data collection on waste generation and composition was carried out by sampling at residents' homes. The results of the sampling obtained the weight of waste generation of 0.1393 kg/person/day with a waste volume of 0.0022 m3/person/day. The composition of the waste consists of organic waste, plastic, paper, cloth/textile, glass, Styrofoam, and diapers. With the percentage of waste composition, respectively, namely 64.55%; 19.7%; 8.49%; 1.71%; 0.41%; 0.75%; and 4.38%. From this data, a TPS 3R building is planned which can process waste up to a volume of 164.55 m3/day. Consists of a reception room, sorting room, inorganic waste storage room, plastic waste processing unit, organic waste processing unit, liquid organic fertilizer storage room, residual waste storage room, and supporting facilities. From the planning that has been done, it takes a budget plan of Rp2.052.524.176,35.Jumlah sampah yang terus meningkat ditambah dengan kurangnya fasilitas pengelolaan sampah, serta kurangnya pengetahuan dan kesadaran masyarakat dalam mengelola sampah menyebabkan adanya penumpukan sampah hingga berdampak pada pencemaran lingkungan. Di daerah kecamatan Kesamben, Jombang belum terdapat fasilitas pengelolaan sampah sehingga masyarakat memilih melakukan open burning, membuang sampah di tepi jalan, bahkan membuang sampah langsung ke sungai. Dari permasalahan tersebut, dilakukan perencanaan TPS 3R di Kecamatan Kesamben. Dalam merencanakan TPS 3R, diperlukan data penduduk dan proyeksi penduduk, data timbulan sampah, komposisi sampah, proyeksi timbulan sampah serta HSPK wilayah setempat. Data timbulan dan komposisi sampah diambil dari kegiatan sampling sampah di rumah-rumah warga. Hasil sampling menunjukkan berat timbulan sampah sebesar 0,1393 kg/orang/hari dengan volume sampah sebesar 0,0022 m3/orang/hari. Komposisi sampah terdiri atas sampah organik, plastik, kertas, kain/tekstil, kaca, Styrofoam, dan popok. Dengan presentase komposisi sampah berturut-turut yaitu 64,55%; 19,7%; 8,49%; 1,71%; 0,41%; 0,75%; dan 4,38%. Dari data tersebut dilakukan perencanaan bangunan TPS 3R yang dapat mengolah sampah hingga volume 164,55 m3/hari. Terdiri atas ruang penerimaan, ruang pemilahan, ruang penyimpanan sampah anorganik, unit pengolahan sampah plastik, unit pengolahan sampah organik, ruang penyimpanan pupuk organik cair, ruang penampungan sampah residu, dan sarana penunjang. Dari perencanaan yang telah dilakukan dibutuhkan RAB sebesar Rp2.052.524.176,35
An ecosystem approach to integrated coastal zone management: Case study on the Gresik Regency, East Java
Full text linkGresik Regency is one of the industrial development areas in East Java Province due to its strategic location. This region has the opportunity to actively integrate the ecosystem into development planning. Management of integrated coastal areas is widely advocated at all levels of government as a means of delivering sustainable development in coastal areas. This study was conducted to determine the level of impact caused by each activity cumulatively on coastal and marine ecosystems in Gresik Regency. In general, this study is oriented towards collecting data of marine pollution level from various substances and sources, as well as changes over time in the status of the marine environment in Gresik Regency. The results showed that the increase in population growth accompanied by an increase in the amount of waste, as well as an increase in industry, port and agricultural activities in coastal areas of Gresik Regency require special attention in the management of the coastal and marine environment in Gresik Regency. The use of coastal and marine areas of Gresik Regency can lead to loss of biodiversity, as well as decreased stability and resilience of ecosystems in coastal and marine areas. It is necessary to take into account the pressures and impacts due to activities in coastal and marine areas and then propose the most appropriate development solutions within the framework of Integrated Coastal Zone Management in Gresik Regency
Ideal Data to Determine Accurate Fajr Time
Full text linkEarly fajr time research was carried out by various parties with various techniques, one of which was using a sky quality meter (SQM) photometric tool. Observational data from various regions that have varying night levels result in a varying early fajr time as well. By paying attention to the effect of sky quality represented by the night level at the observation location, this research wants to answer whether the 20 mpsas night level limit is ideal data by looking at the correlation coefficient between night level and the turning point solution. From 1068 data with varying night levels, the correlation coefficient ( ) between the night level and the turning point solution is 0,42 which means there is an effect, while for data with a minimum night level of 20mpsas the correlation coefficient is 0,07 which means there is no influence. Based on the results of the analysis, the night level of 20mpsas can be the minimum limit for conducting an ideal early fajr time research. From 241 ideal observation data from 6 LAPAN observation stations, early fajr time presents when the Sun's elevation angle is -16,51°. Early fajr time is also the beginning of subuh prayer time, with its standard used in Indonesia, which is -20° or 3,49° different from the analysis results, if it is converted there is a difference of 13 minutes 57 seconds