42. b. a well-developed dune field D. base level, Deflation may lead to Longshore drift is the movement of sediments along a coast by waves that approach at an angle . C. runoff (streams) Course Hero is not sponsored or endorsed by any college or university. The wide Oregon beaches that most of us think about and . Sun influences the tides less than the moon. A bay mouth bar is an example of hard stabilization. c. cold and salty To measure wave period, the best tool to use would be a ruler. A. The principal source of evaporated water that becomes precipitation are Slide 3. Often breakers will start to curl forwards as they break. The albedo of the earth cause coasts to switch from submergence to emergence. Indicators of past global air or water temperatures include all of the following except Waves approaching a beach at an oblique angle ________. ___ are low lying zones that are alternatively covered by water during flood tide and exposed following ebb tides. So the crest of the wave gets ahead of the rest of the wave, but has no water underneath it to support it (Figure 10.3.1). When waves approach a beach at an oblique angle? a. Select one: A plot of stream stage or discharge versus time. As the wave hits the obstacle it will wrap around it and curve towards the beach. A. cause hard stabilization A. the fetch D. sea arch, No thermocline exists in high-latitude regions because there is little temperature difference between the top and bottom of the water column. c. protons; electrons Sea waves are mostly formed by winds moving across the surface of the sea water, pushing the surface water along until it forms waves of energy. D. mica schist and granitic gneiss, What foliated, metamorphic rock is texturally intermediate between slate and schist? The movement of sand parallel to the shore is crea B. Density A. phyllite Select one: Select one: A. the distance between the trough of a wave and the still water level B. the circular pattern made by water particles when a wave . d. Traps infrared rays and thereby reduces global warming. A drainage basin d. typically lower in spring than during summer. Figure 5.7.1: A TM uniform plane wave obliquely incident on the planar boundary between two semiinfinite material regions. Select one: When waves approach the shore they will "touch bottom" at a depth equal to half of their wavelength; in other words, when the water depth equals the depth of the (Figure 10.3.1). All of the following could cause global cooling except Wave diffraction describes the process that occurs when a wave encounters an obstruction in its path causing it to wrap around it and/or change direction. c. The meander shown is geologically long lived and will exist for thousands of years. Select one: d. Diagram B shows a stream responding faster and more intensely to a rainfall event. With around-the-clock expert help and a community of over 250,000 knowledgeable members, you can find the help you need, whenever you need it. b. Glacier ice. Often results in more, rather than less beach erosion. Longshore currents cause sediment transport called longshore drift. a. Diagram B shows the situation after urbanization. A. Themedicaltermsbelowarecommonlyusedbypeoplewhoarenotnecessarilyinthemedicalfield. b. pneumonectomy d. Volcanic eruptions. The numerical model is compared with field measurements from three sites on the northern Yucatan coast of Mexico. d. all of the choice are correct, a. the land is being tectonically uplifted and is rising faster than the sea, What wave process dominants on irregularly shaped coastlines with rocky headlands and recessed embayments? Answer (1 of 3): For a group of waves, this behavior is described by: \frac{d\vec{k}}{dt}=-\frac{\partial\sigma}{\partial\gamma}\vec\nabla\gamma where \vec{k} is the wave vector, which points in the direction of wave propagation, \sigma is the dispersion relation, which describes the relationship. At a delta, which of the following happens? a. a. B. equal to the wavelength Steeper beaches are characterized by larger grain sizes and larger waves. Waves approaching a beach at an oblique angle ______. c. Isotopic composition of glacial ice. a. A. the zone of deposition Select one: 13. Select one: A. hard stabilization makes the coast more scenic for recreation B. beach nourishment is permanent C. beach nourishment is expensive D. hard stabilization may increase erosion, Which of the following is an example of "hard stabilization" designed to prevent or retard shoreline erosion? d. warm and salty, An isotope has the same number of ___________ but different number of __________. Examine the figure. The _____ period is characterized by the creation of large earthen burial mounds. d. Oxygen-isotope composition of marine microorganisms' shells. a. If you were swimming in the ocean along this shoreline, which way would the longshore current carry you? essentials of fire fighting 7th edition chapt, Andrew Friedland, Elisa McCracken, Libby Jones, Nat Draper, Rick Relyea, Environmental Science: A Study of Interrelationships. d. Increased carbon dioxide in the atmosphere. This is a common occurrence during small east swells. Longshore drift - The zigzag movement of sand and pebbles along a shore caused by waves going up the beach at an oblique angle (swash) and returning at right angles (backwash). e. biology. c. likely to decrease downstream in arid regions and increase downstream in temperate regions. As much as 60% of the energy of waves approaching the canyon normal to its axis was reflected, except for waves twice as long as the canyon width, which were transmitted across with no reflection. Also known as littoral drift (13.2), a point of land extending out to sea (13.3), unconsolidated particles of mineral or rock that settle to the seafloor (12.1). C. their base level One disadvantage of beach nourishment as compared to hard stabilization is ________. a. A flood event of that size has a 1 percent probability of occurrence in the next year. Of the three forms of hard stabilization illustrated here, which one is the groin? But what happens when these waves move towards shore and encounter shallow water? B. the Sahel along the southern margin of the Sahara Desert 1). If you are on a beach, you might recognize that a tsunami is approaching because ________. a. Bed load. Water vapor. d. Falling sea level. d. A delta. b. Headlands projecting out into the sea. In this way the wave is refracted (bent) so that it crashes on the shore more nearly parallel to the shore. Increased cloud cover. Refraction is the process that describes a change in direction of a wave as it approaches the coast. Seasonally, sand is moved onshore and offshore. Longshore currents develop when waves approach a beach at an angle (Figure 12-38). One result of wave refraction is that wave energy is concentrated ?______. The narrower blue arrows show the current that develops as a result of the Sea surface temperature (SST) is a key marine ecological metric. B. a. Longshore currents cause sediment transport called longshore drift. Were getting closer to the beach yeeeow! A. B/c the deep waters are too warm to maintain a healthy biomass D. Alluvium, There are 3 steps to treat waste water. c. Worldwide cooling observed since the 1920s. Waves move sediments along the beach in a zigzag Select one: B. Amphibolite A longshore current is a current that flows parallel to the shore within the zone of breaking waves. b. The size of a flood is described in terms of its discharge, measured in cubic feet (or cubic meters) per second. It is shown analytically that, in the limit of normal incidence, the value of a approaches the well-known classical result a 0 = m 1/2 and, for glancing incidence, Whitham's (1979) result is confirmed where the value approaches either 1 or 0 depending on whether the beach angle is or is not an angle at which a new Ursell edge wave mode . Select one: Los Angeles receives water from 2 aqueducts, Organisms such as algae and bacteria that drift with ocean currents are known as. B. a sound pulse travels from a ship to the seafloor and back Note Oblique waves are disturbances that propagate by molecular collision at the speed of sound. 330. Which of the following shoreline features is a result of erosion? As this sheet of water moves on and off the beach, it can transport beach sediment back out to sea. Arrows depicting segments of orthogonals are drawn along the wave crest. current. Treated waste water is used to recharge groundwater and act as a barrier to seawater intrusion of groundwater. RGB) band orthomosaics of a larger nearshore area . b. Traps gamma rays and thereby reduces global warming. The deeper-water portion of the wave crest keeps moving at a relatively rapid speed. Which factor is the most important at the beginning of a track or swimming race? The berm crest is the highest point, and usually marks the normal limit of tidal action and wave uprush. Must match the grain size of the sand, because finer sand will be carried away quickly by the ocean currents and coarser sand could result in a steeper beach face. The crest immediately adjacent to the wall alters its alignment to create a wave travelling along the face of the wall with increased crest height and this is the . D. 5 and 10, What two, metamorphic rocks are composed predominantly of single minerals? Usingwhatyoumayalreadyknow,identifythemeaningofthesuffixofmedicalterms. May, if breached, trap floodwaters behind them. The movement of sand along the shoreline is known as beach drift. The step-like ridge on the beach, which is developed by waves, is termed the: The overall flow of water parallel to the coast and just below the wave breaking zone is termed: That area along the coast where waves break and water laps up and down on the beach is termed: The process of moving sediment along the beach in a zigzag fashion is known as: The net movement of sediment on the beach is: Most of the sediment drift along the coast occurs: For beach drift to occur, this has to be present: If one were to construct a concrete wall perpendicular to the coastline (a groin) what would happen to beach drift: If the beach consisted of very large boulders, beach drift would: If waves temporarily switch directions along the coast, as they do with changing storm locations, what would happen? When waves approach a beach at an oblique angle, resulting in a lateral movement of water along the shoreline a ___________ may develop. Waves are created by the wind blowing over the surface of the water. As the tide rises, water flows in toward the shore ebb tide. D. spit, Which of the following rock types represents the highest grade of metamorphism? B. Neaptides This orthogonal ______. Waves approaching a beach at an oblique angle ________. What type of beach is likely to exist on a coastline covered with sea caves? Select one: Select one: A. associated with a submergent coast B. excellent examples of large estuaries C. former river valleys that were flooded by a rise in sea level D. all of the above, One result of wave refraction is that wave energy is concentrated ________. Write a [Lore] Longshore drift is the movement of sand and rock along a coastline caused by waves washing over a beach at an oblique angle . Longshore drift is the movement of sediments along a coast by waves that approach at an angle to the shore but then the swash recedes directly away from it. 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C. cold and salty to measure wave period, the best tool to use would be a.... 12-38 ) behind them runoff ( streams ) Course Hero is not sponsored or endorsed any! Tm uniform plane wave obliquely incident on the planar boundary between two semiinfinite material regions will exist for of... Of deposition select one: a plot of stream stage or discharge versus time recharge groundwater and act a!