PART III: ANALYSIS OF MEASURED WAVE DATA 

 Data Description 



20. Data were provided to WES by US Army Engineer District, Alaska 

 (NPA), on magnetic tape duplicating that published in Data Reports 1 and 2 of 

 the ACDCP. These data consisted of three sets of tables: "Summary Table for 

 Wind/Wave Data," "Summary Table for Wind Data," and Energy Spectrum" tables 

 presenting data collected by two Waverider buoys. The Waverider buoys, de- 

 noted as buoy 1 (outer buoy) and buoy 2 (inner buoy), are located in Chiniak 

 Bay and St. Paul Harbor, and are in 77 m and 16 m of water, respectively (see 

 Figure 1). The data provided included measurements taken from October 1981 

 through September 1983. Also provided on magnetic tape was an edited version 

 of National Weather Service (NWS) anemometer data from 1945 through 1982 mea- 

 sured by an instrument located between the Kodiak Airport and Womens Bay at 

 the present site of the US Coast Guard Kodiak Air Station. The detailed for- 

 mat of the original data and modifications made during the analysis will be 

 described in the following paragraphs. 



Data Selection 



21. Extreme wave conditions for the north Pacific tend to occur dur- 

 ing the winter months. This is exemplified by the frequency distribution 

 for months with extreme wave conditions producing significant wave heights 



of 6 m or more given in Table 10. The values in Table 10 were computed using 

 the hindcast data. 



Table 10 



Frequency Distribution of Months During Which Extreme 



Events Occurred for the 20-Year Hindcast Period 



Month Frequency 



October 9 



November 17 



December 20 



January 22 



February 7 



March 2 



April 1 



21 



