3 Existing Data Sources 



Beach Profiles 



A comprehensive profile monitoring plan was initiated with the beachfill of 

 1991 under the MCNP Program. Monitoring consisted of beach profile and 

 lake bed surveys taken several times each year at seven transects spaced at 

 about 200 m in the immediate fill area, and additional profiles at 800-m inter- 

 vals further to the south (a summary is provided in Table 2). The profile 

 surveys are described by Parson, Morang, and Nairn (1996) and an associated 

 sediment sampling program is presented by Parson and Smith (1995). 

 Section 1 1 1 profiles are designated with the letter "R" and extend from north 

 to south. Line R8 is the first profile south of the jetties, and R23 is the 

 southern-most line monitored for this study (Figure 3). Four historical profile 

 lines, Nos. 1, 2, 3, and 4, were also analyzed to determine multi-decade 

 changes in offshore morphology. 



Lake Bed Bathymetry 



In 1995, the bathymetry of the study area was surveyed with new airborne 

 technology. SHOALS (Scanning Hydrographic Operational Airborne LIDAR 

 Survey) is a helicopter-mounted hydrographic surveying system which utilizes 

 Light Detection and Ranging (LIDAR) to transmit and receive water surface 

 and sea bottom signals. Using conventional acoustic methods, the bathymetry 

 was previously surveyed in 1945/6, 1964/5, and in 1991 by the National 

 Oceanic and Atmospheric Administration and the U.S. Geological Survey in a 

 joint mapping project (Foster et al. 1992). 



Wave and Water Level Data 



Wave climate information has been generated by Hubertz, Driver, and 

 Reinhard (1991) as part of the Coastal Engineering Research Center (CERC) 

 Wave Information Studies (WIS). A detailed discussion of the wave hindcasts 

 generated for this project is given in Parson, Morang, and Nairn (1996). 



Chapter 3 Existing Data Sources 



