All Stations
Condomania: Variation in Erosion Rates at the Morton and Pieper Stations

    C A L C U L A T O R
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    [Click on the blank on the left and enter a value. Hit the tab key and enter the other value. Click on the operation that you want to preform.]

    Use the calculator above to fill in the blanks in the Shoreline Changes Table for the Stations that follows.

    Look at the table and decide what operation you need to perform to fill in the blank. Position your cursor in the answer box and type in your answer. Push the return key on your keyboard to have your answer evaluated.

    Shoreline Changes

    StationDistance (feet)Rate (feet per year)
    10 : 1852-1974 : (122 years)+ 550 feet- 4.5 feet/year
    14 : 1852-1974 : (122 years)+ 725 feet + 5.9 feet/year
    18 : 1852-1974 : (122 years)+ 1,175 feet
    22 : 1852-1974 : (122 years) + 31.8 feet/year
    26 : 1852-1974 : (122 years)- 500 feet
    30 : 1852-1974 : (122 years)- 1,625 feet - 13.4 feet/year

    Locate the individual stations on the following map.

    Multiple choice  

    1. As noted previously, this area along the Texas Gulf Coast is undergoing a rise in sea level. The data presented above agree with this finding.

        True
        False

    2. Therefore, there must be differences in the availability of sand for these stations.

        True
        False

      Recall that the total distance eroded or accreted is divided by the time interval to compute the average annual rate. Information about changes on another time scale (a single year or a decade, for example, are lost.

      Consider a two stretches of shoreline that are observed for 10 years. After 5 years there is no change at Station A but 100 feet of shoreline accreted at Station B. After an additional 5 years there is again no change at Station A but 100 feel of shoreline eroded at Station B.

    3. For the total 10 years, average rates of change at Stations A and B are both equal to 0.0 feet per year.

        True
        False

      If just the 10 year time period were reported you would be led to believe that neither shoreline changed during the study period.

      Return to continue exploring these data.