Biological Effects of Power-plant Thermal Effluents in Card Sound, Florida

1979 ◽  
Vol 6 (2) ◽  
pp. 127-137 ◽  
Author(s):  
Anitra Thorhaug ◽  
Martin A. Roessler ◽  
Steven D. Bach ◽  
Raymond Hixon ◽  
Iver M. Brook ◽  
...  
Keyword(s):  
Power Plant ◽  
Benthic Community ◽  
Plant Biomass ◽  
Biological Effects ◽  
Biomass Growth ◽  
Marine Environments ◽  
Large Area ◽  
Thermal Limits ◽  
Thermal Effluents ◽  
Made In

Few studies have been reported of the effects of power-plant discharges on tropical and semi-tropical marine environments where plants and animals in non-stressed conditions live close to their upper lethal thermal limits. This paper describes a multidisciplinary three-years' study made in Card Sound, Florida, before, during, and after, thermal effluents were released from a power-plant. Biomass, growth, and production, of Thalassia and macroalgae, were estimated. Animals were collected by trawl, drop-net, suction dredge, in artifical habitats, and on mesh-panels. Except in an area of 2–3 ha adjacent to the canal mouth, little damage to the benthic community was observed. This was very different from the effect of the first canal emanating from the same power-plant at Turkey Point, where a large area had been affected by heated effluents.

New records of Compsopogon aeruginosus (Rhodophyta) in rivers of central Europe

2013 ◽  
Vol 42 (4) ◽  
Author(s):  
Zdeňka Žáková ◽  
Manfred Pum ◽  
Pavel Sedláček ◽  
Hana Mlejnková ◽  
František Hindák
Keyword(s):  
Czech Republic ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Central Europe ◽  
Nuclear Power ◽  
New Records ◽  
Cooling Water ◽  
Thermal Effluents ◽  
South Moravia ◽  
Made In

AbstractThe representatives of the genus Compsopogon Montagne in Bory et Durieaux (Rhodophyta) are basically tropical or subtropical algae. In central Europe they are only found in aquaria and in water bodies affected by thermal effluents, like the species C. aeruginosus (J. Agardh) Kützing in the Pulkau River (Austria), a tributary of the Dyje /Thaya River (Austria, Czech Republic). The first observation of this species was made in 2007 in the Pulkau River. In autumn 2010 the species was also observed at lower densities in an approximately 20 km section of the Dyje/Thaya River between the mouth of the Pulkau River (A) and the Nové Mlýny Reservoir (CR). Recently, the species was found also in Skryjský Brook, a tributary of the Jihlava River, below the cooling water effluent from the Dukovany Nuclear Power Plant, South Moravia, Czech Republic. This is the second finding of representatives of the genus Compsopogon in rivers in central Europe.

scholarly journals Monitoring the Impact of the Large Building Investments on the Neighborhood

2021 ◽  
Vol 11 (14) ◽  
pp. 6537
Author(s):  
Marian Łupieżowiec
Keyword(s):  
Groundwater Level ◽  
Soil Improvement ◽  
Deep Excavation ◽  
Large Area ◽  
Safety Measures ◽  
High Rise ◽  
The Impact ◽  
Large Building ◽  
Additional Safety ◽  
Made In

The article presents the concept of monitoring buildings and infrastructure elements located near large construction investments (the construction of high-rise buildings of the Oak Terraces housing estate in Katowice and the construction of a tunnel under the roundabout in Katowice along the intercity express road DTŚ). The impacts include deep excavation, lowering of the groundwater level over a large area, and dynamic influences related to the use of impact methods of soil improvement. The presented monitoring includes observation of the groundwater level with the use of piezometers, geodetic measurements of settlement and inclinations, as well as the measurement of vibration amplitudes generated during the works involving shocks and vibrations. It was also important to observe the development of cracks on the basis of a previously made inventory of damage. The results of the monitoring allow corrections to be made in the technology of works (e.g., reduction of vibration amplitudes, application of additional protections at excavations, etc.) or the use additional safety measures. Currently, there are also monitoring systems used during the operation of completed facilities.

scholarly journals Morphometric Characteristics of the Aziana Valley Basin

2021 ◽  
Vol 32 (2) ◽  
pp. 163-180
Author(s):  
Heba Mohammed Fayyad ◽  
Isaac Saleh Al-Akam
Keyword(s):  
Morphometric Characteristics ◽  
Elongation Ratio ◽  
Large Area ◽  
Parallel Patterns ◽  
Erosion Processes ◽  
Drainage Patterns ◽  
Drainage Networks ◽  
Mixed Sediments ◽  
Sedimentation Processes ◽  
Made In

The present study aims at examining quantitatively the morphometric characteristics of Iziana Valley basin that is located in the northern part of Iraq; particularly in south of Erbil Governorate. This basin is considered one of the small sub-basins where its valleys run on formations of the Triple and Quadrant Ages, which are represented by the Bay Hassan formations, and the sediments and mixed sediments of the cliffs, respectively. The area of ​​the Iziana basin amounts to (36.39 km2) whereas the percentage of its rotation reaches (0.17); a low percentage, which indicates that the basin diverges from the circular to the rectangular shape. The value of the elongation ratio of the basin reaches (0.38) while the terrain ratio of the basin is (0.03), a low percentage that entails the weakness of its erosion processes and the small volume of the carried and transported sediments. As for the relative topography of the basin, it was (1.08), which is also a low value. It indicates a relatively large area of ​​the basin and the impressive strides that it has made in its erosion cycle. The total river levels of the basin reach (5) ranks, and their numbers vary from one rank to another. Moreover, the total length of the drainage networks in the basin reached (187.4 km), and the prevailing drainage patterns in the basin are the tree and parallel patterns. The researcher has adopted spatial, formal, topographical, and river net-work properties for the purpose of first determining the shape of the basin, the stage of its erosion, its secondary basins, and its terrestrial features that have been developed as a result of the contrast between the erosion and sedimentation processes. 

scholarly journals INVESTIGATION OF RELATIONSHIP BETWEEN PINE (PINUS SYLVESTRIS L.) BIOMASS AND 137CS SPECIFIC ACTIVITY IN WOOD

2006 ◽  
Vol 14 (3) ◽  
pp. 135-140 ◽  
Author(s):  
Donatas Butkus ◽  
Ingrida Pliopaitė Bataitienė
Keyword(s):  
Power Plant ◽  
Pinus Sylvestris ◽  
Nuclear Power ◽  
Specific Activity ◽  
Chernobyl Nuclear Power Plant ◽  
Biomass Growth ◽  
Annual Rings ◽  
Global Pollution ◽  
Nuclear Explosions ◽  
Average Value

The paper analyses relationship between pine (Pinus sylvestris L.) biomass and the specific activity of an artificial radio‐isotope 137Cs in wood. The specific activity of 137Cs was measured in the segments of pine (Pinus sylvestris L.) annual rings. The biomass of segments and the density of wood were estimated experimentally. It is determined that relationship between pine (Pinus sylvestris L.) biomass and pine age is not linear. In the variation of biomass are time when biomass grows slowly (25–55 pine age or 1959–1990 m. period). The specific activity of 137Cs in pine annual rings depends on the rapidity of biomass growth. The specific activity of 137Cs varied from 0,3 ± 0,1 to 13,4 ± 2,7 Bq/kg when the biomass grew rapidly and its average value was 4,3±1,1 Bq/kg. When the biomass grew slowly, the specific activity of 137Cs varied from 1,8 ± 0,7 to 20,6 ± 5,3 Bq/kg, and its average value was 9,6 ± 2,6 Bq/kg. Global pollution after nuclear explosions, pollution after the Chernobyl Nuclear Power Plant accident and uptake of 137Cs from roots had an influence on the specific activity of 137Cs in pine annual rings.

scholarly journals Rancang Bangun Sistem Pembangkit Listrik Tenaga Air Menggunakan Konsep Hydrocat

2021 ◽  
Vol 4 (1) ◽  
pp. 7
Author(s):  
Syaiful Anwar ◽  
Muhamad Taufiq Tamam ◽  
Itmi Hidayat Kurniawan
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
System Design ◽  
Electrical Energy ◽  
Hydroelectric Power ◽  
Depth Level ◽  
Irrigation Channel ◽  
Water Turbine ◽  
The Times ◽  
Made In

Seiring perkembangan jaman, saat ini energi listrik telah menjadi salah satu kebutuhan primer dalam kehidupan sehari-hari, baik untuk melakukan pekerjaan ataupun kegiatan yang lainnya. Pembangkit Listrik Tenaga Air atau PLTA dengan menggunakan konsep hydrocat merupakan sebuah konsep pembangkit listrik yang diciptakan untuk aliran jalur irigasi yang memiliki ukuran tidak terlalu besar dan tingkat kedalamannya yang rendah. Oleh karena itu dibuatlah rancang bangun sistem pembangkit listrik menggunakan konsep hydrocat. Pada penelitian ini menggunakan generator DC sebagai sumber tenaga listrik dan menggunakan jenis turbin undershot. Penelitian ini dilakukan di Desa Karang Cegak Kecamatan Kutasari Kabupaten Purbalingga. Beban pada penelitian ini menggunakan lampu LED SMD 1,2 Watt, 2,4 Watt 3,6 Watt, dan 4,8 Watt. Alat ini mampu menghasilkan putaran pulley turbin air sebesar 69,2 rpm, 60,8 rpm, 59,0 rpm, 58,7 rpm, 57,1 rpm, dan 56,7 rpm. Putaran pulley generator DC sebesar 595,9 rpm, 586,1 rpm, 520,1 rpm, 506,2 rpm, dan 496,0 rpm. Besar tegangan yang dihasilkan 31,86 Volt, 9,20 Volt, 8,61 Volt, 8,38 Volt, dan 8,25 Volt. Besar arus yang dihasilkan sebesar 0,02 Ampere, dan besar daya yang dihasilkan sebesar 0,1836 Watt, 0,1718 Watt, 0,1671 Watt, dan 0,165 Watt.Along with the development of the times, nowadays electrical energy has become one of the primary needs in everyday life, both for doing work or other activities. Hydroelectric Power or Hydroelectric Power using the hydrocat concept is a power generation concept created for irrigation channel flow that is not too large and has a low depth level. Therefore, a power plant system design using the hydrocat concept was made. In this study using a DC generator as a source of electricity and using a type of undershot turbine. This research was conducted in Karang Cegak Village, Kutasari District, Purbalingga Regency. The load in this study uses 1.2 Watt SMD LED lamps, 2.4 Watt 3.6 Watt, and 4.8 Watt. This tool is capable of producing water turbine pulley rotation of 69.2 rpm, 60.8 rpm, 59.0 rpm, 58.7 rpm, 57.1 rpm, and 56.7 rpm. DC generator pulley rotation of 595.9 rpm, 586.1 rpm, 520.1 rpm, 506.2 rpm, and 496.0 rpm. The resulting voltages are 31.86 Volts, 9.20 Volts, 8.61 Volts, 8.38 Volts, and 8.25 Volts. The amount of current generated is 0.02 Ampere, and the amount of power generated is 0.1836 Watt, 0.1718 Watt, 0.1671 Watt, and 0.165 Watt.

The design and execution of a laboratory micro hydroelectric power plant

2021 ◽  
Vol 66 (1) ◽  
pp. 45-56
Author(s):  
Elisabeta Spunei ◽  
Ionel Turcu ◽  
Alina-Dana Vișan
Keyword(s):  
Power Plant ◽  
Engineering Students ◽  
Hydroelectric Power Plant ◽  
Hydraulic Turbine ◽  
Hydroelectric Power ◽  
Pelton Turbine ◽  
Fast Prototyping ◽  
Turbine Casing ◽  
Made In

The paper presents a laboratory micro hydroelectric power plant destined to applicative activities. The hydraulic turbine is a Pelton turbine, rebuilt by fast prototyping in Geomagic Design X and printed on a 3 D printer. The turbine casing and the afferent elements are made in-house. The hydrogenator is synchronous being an alternator from a Dacia vehicle. The hydrogenerator load is constituted by 3 groups of light bulbs. We analysed the working of the micro-hydroelectric power plant in idle run and for different loads. As a result of the analysis we found out that it stably works for different loads and by its open construction it is useful for developing students’ ability to understand the phenomena. The installation designed and executed is useful for the engineering students as the pandemic forbids the thematical visits in hydro-energetic facilities.

Leisure Activities in Marine Environments

2020 ◽  
Author(s):  
Professor John Swarbrooke
Keyword(s):  
South Africa ◽  
Marine Environment ◽  
Leisure Activities ◽  
Risk Level ◽  
Marine Environments ◽  
Coastal Tourism ◽  
The Past ◽  
Made In

In recent years we have seen a veritable ‘explosion’ in the use of the sea for a growing variety of marine leisure activities. This is now a truly global phenomenon that can be seen from Iceland to South Africa, Australia to Florida. Activities in the sea have always been part of coastal tourism, from paddling and swimming to sailing and diving to angling and boat trips. However, in the past decade or two we have seen the invention of new activities and the developments of variations on traditional marine activities. We now have coasteering, wild swimming, paddle-boarding, RIB and banana boats and sea kayaking, all giving tourists further opportunities to get pleasure from the marine environment. Many of these activities also reflect a change in marine leisure with an increase in active rather than passive activities and an increase in adventure activities. This has, inevitably, increased the risk level of sea-based leisure activities in some ways. Several of the more adventurous new activities also involve travelling further from land or to less developed areas of coast, increasing the risk further. Interestingly, it appears that many tourists become ‘hooked’ on some sea-based leisure activities once they have experienced them on vacation. From that point onwards their desire to continue to participate in an activity will often influence their choice of vacation destination. The innovative developments we have seen in terms of sea-based leisure activities have led to a huge increase in participation in marine leisure activities. This has been stimulated by, and reflected in, the investment made in equipment and infrastructure for such activities by governments, commercial operators, and hotels and resorts.

The euRathlon 2015 Grand Challenge: The First Outdoor Multi-domain Search and Rescue Robotics Competition—A Marine Perspective

2016 ◽  
Vol 50 (4) ◽  
pp. 81-97 ◽  
Author(s):  
Gabriele Ferri ◽  
Fausto Ferreira ◽  
Vladimir Djapic ◽  
Yvan Petillot ◽  
Marta Palau Franco ◽  
...  
Keyword(s):  
Power Plant ◽  
Industrial Area ◽  
Search And Rescue ◽  
Grand Challenge ◽  
Fukushima Accident ◽  
Marine Robotics ◽  
Rescue Robotics ◽  
The World ◽  
Intervention Team ◽  
Made In

AbstractThe euRathlon project was an FP7-funded Coordination and Support Action (2013‐2015). Its main aim was to organize outdoor robotics competitions in realistic search and rescue response scenarios for cooperative land, sea, and air robots. Participant teams were requested to test the intelligence and autonomy of their robots in scenarios inspired by the 2011 Fukushima accident. In the project's third year euRathlon culminated with the organization of the first outdoor multi-domain search and rescue robotics competition in the world: the euRathlon 2015 Grand Challenge. Sea, air, and land robots were asked to cooperate acting as a robotic intervention team in a scenario simulating an industrial area ravaged by a tsunami. The Grand Challenge was held in Piombino, Italy, in the surroundings of the Tor del Sale power plant, from September 17 to 25. To prepare the teams for the Grand Challenge, two competitions, dedicated to land and marine robots, respectively, took place in 2013 and 2014. In all the competitions, a strong effort was made in benchmarking what led to meaningful and reasonable scoring principles. Workshops and educational activities complemented the competitions. In this paper, we will focus on the marine robotics competitions of euRathlon with a particular focus on the Grand Challenge. Both technical achievements and general results are presented. The results in terms of team participation and the fruitful effort in dissemination led to establish euRathlon Grand Challenge as the de facto leading search and rescue outdoor robotics competition in Europe.

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