Hydrology Prelab Assignment

Hydrology Prelab Assignment - Hydrology Prelab Assignment...

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Hydrology Prelab Assignment Waves, Currents, Tides, and Topography In preparation for the Hydrology lab, please complete this prelab assignment introducing concepts of wave hydrology presented on the field trip. This assignment is due upon arrival at the field site. Background information about the Hydrology Lab : This lab exercise will take place on the shores of La Jolla Ecological Reserve, a nearby coastal location that includes several types of subtidal microhabitats as well as large-scale benthic topographical features, such as a submarine canyon. The purpose of this lab exercise is to examine concepts related to physical oceanography including wave formation and attenuation, global and local currents, and tides. We will also discuss how the movement of water influences nearshore nutrient loads and species distributions. You will formulate hypotheses about the strength and direction of longshore currents based on observations of sand deposition and the prevailing waves and relate these hypotheses to the biotic components of both sandy bottom and rocky reef habitats within the reserve. Logistics 1. Where and at what time will we be meeting for the Hydrology lab? La jolla 2. Where can you find directions to the field site? On blackboard 3. What are you asked to bring to the Hydrology lab field trip? Swimsuits, sunscreen, lunch, and the prelab Objectives of the assignment: - Introduce you to web-based resources that can be used to gain information about the marine environment. - Become familiar with terms, concepts, and applications associated with waves, currents, and tides. and the topography of the ocean floor. What to do : Search the Internet using the links provided (as well as attached web pages) to find information to answer the following questions. In order to find all of the answers you must complete the questions in the order presented . I. Tides Open Internet Explorer or Netscape and go to http://www.ndbc.noaa.gov/educate/tides.shtml . This wed site is hosted by the National Data Buoy Center (NDBC), a part of the National Oceanic and Atmospheric Administration (NOAA). 1. What are tides and what forces act on them? The tides are basically the sun and moons gravitational pull on the earth 2. Of the two main sources of gravitational attraction, which has a greater effect on the magnitude of tides and Why? The sun and the moon affect gravitational attration althought the moon has far greater effect because of the closer proximity to the earth 3. What do you think a graph of tide data looks like? To answer this question click on the link near the bottom of the page and draw the tidal graph in the space below making sure to label the axes correctly.
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4. What do you notice about the number of high and low tides and their magnitudes each day? 5.
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This note was uploaded on 04/18/2008 for the course BIO 170 taught by Professor Staff during the Spring '08 term at Oregon State.

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Hydrology Prelab Assignment - Hydrology Prelab Assignment...

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