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analysis of tidal stream power
This text integrates a wide range of research and tidal resource theory and data to present a detailed analysis of the physics and oceanography of tidal stream power devices together with a world wide resource analysis.Clearly structured throughout the book is divided into two distinct parts.
eBook
Tidal power
Offers a unique and highly technical approach to tidal power and how it can be harnessed efficiently and cost-effectively, with less impact on the environment than traditional power plants With the demand for energy outstripping conventional sources from fossil fuels, new sources of energy must be found. Tidal power is a potentially rich source of renewable energy. Even though power plants that run on hydropower have been around a long time, new types, such as those run without dams, have not been as heavily researched and presented to the scientific community. This book is a step in that direction—suggesting more cost-effective and less environmentally intrusive methods for creating power sources from rivers, the tides, and other sources of water. Presenting a detailed discussion of the costs, risks, and challenges of building power plants that run on hydropower, Tidal Power: Harnessing Energy From Water Currents: * Covers the technical aspects of tidal power plants without dams, or \"Marine Hydro Kinetic (MHK)\" power plants * Covers tidal barrages with reservoirs and how they can be utilized to generate renewable energy * Details the regulations of hydro power plants that do not use dams * Gives real examples of turbines that have been built using these new technologies As the global supply of conventional energy sources, such as fossil fuels, dwindles and becomes more and more expensive, unconventional and renewable sources of energy, such as power generation from water sources, becomes more important—making Tidal Power an incredibly valuable text for engineers, students, and researchers working in the field.
eBook
Blue planet. Episode 7, Tidal seas
Tidal marshes are among the most productive habitats on Earth. Numerous plants support numerous animals, yet life is not easy. Relief comes with the crashing waves, as the tides flow once more. Between the tides, when the sands become depleted of food and air, the worms, clams and shrimps must endure the expected pause.
Streaming Video
Characteristics of a Dinophysis cf acuminata Population from a Tidewater Glacier Lagoon in a Temperate Latitude: Applications to Dinophysis Studies
Dinophysis acuminata, the main agent of diarrhetic shellfish poisoning (DSP) worldwide, shows a high variability in morphology and toxin content between strains from contrasting habitats. Most frequent uncertainties in morphological discrimination are within the “D. acuminata complex”, but confusion with other species (e.g., D. norvegica, D. fortii) also occurs. Here we describe a unique PTX2-containing population of Dinophysis cf acuminata observed during opportunistic samplings in San Rafael Lagoon (Chilean Patagonia), the only tidewater glacier lagoon remaining in the glacier with the world’s lowest latitude. Dinophysis acuminata was the only Dinophysis species observed during three seasonal surveys in the well-mixed cold (4–7° C) and brackish (salinity 14–15) waters of the lagoon. Cell densities ranged from 500 cells L−1 (winter) to 2800 cells L−1 (summer). Partial sequences of their ITS rDNA aligned them with D. acuminata strains from Europe and North America, and sequences of their stolen plastids 23S rDNA confirmed ciliates of the Mesodinium rubrum + major complex as their prey and plastid source. All these reasons make this lagoon a highly sensitive area and natural laboratory for climate change-related topics and Dinophysis issues related to (i) the effect of long-term exposure of marine fauna to pectenotoxins and (ii) the adaptations of D. cf acuminata to persist in a unique ecosystem with austral water characteristics located in a warm temperate latitude light regime. Results here add knowledge to the biogeography and habitat ranges of D. acuminata and the problems faced to monitor and provide early warning of its distribution.
Journal Article
Harmful algal blooms and environmentally friendly control strategies in Japan
The presence and status of harmful algal blooms (HABs) in Japan are reviewed, revealing a decrease in red tides; however, toxic blooms are found to be increasing in western Japan. Environmentally friendly control strategies against HABs are also compared with integrated agricultural pest management. Very high densities (105–108 CFU/g) of algicidal and growth-inhibiting bacteria were found in biofilm on seagrass and seaweed surfaces and in surrounding coastal seawater. The situation in freshwater ecosystems is similar to coastal seas for toxic cyanobacterium, Microcystis aeruginosa, and aquatic plants. These findings offer new insights into the ecology of influential bacteria and harmful algae, suggesting that protection and restoration of native seagrasses and seaweeds in coastal marine environments should be implemented to suppress HABs. Diatom blooms were successfully induced with bottom sediment perturbation to prevent the occurrence of harmful flagellates such as Chattonella spp. and Alexandrium catenella in the Seto Inland Sea; however, this method requires robust and reproducible verification. “Sato-Umi” is a helpful concept for HAB control in the sea and freshwater ecosystems when adequately managed by people (e.g., appropriate bottom perturbation; protection and restoration of seaweeds, seagrasses, and aquatic plants; application of polycultures of fish, seaweeds, etc.).
Journal Article
Analysis on the observation data of DSQ water pipe inclinometer and VP vertical pendulum in Wuzhishan Station, Hainan Province
Based on the statistical data, change trend analysis, accuracy, and co-seismic deformation wave analysis of DSQ water pipe inclinometer and VP vertical pendulum of Wuzhishan Station, it is considered that the quality index of continuity, drift, and internal accuracy data meet the requirements of deformation observation. The water pipe inclinometer and the VP vertical pendulum have great differences in the seismic records of different epicenter distances: ① When the epicenter distance is small, the water pipe instrument has no co-seismic response, and the VP vertical pendulum has the clear co-seismic record; ② When the epicenter distance is greater than 6000 km, the two instruments have a similar recording capability.
Journal Article