Gibbs, Ann E. 20010906 Version 1.0 digital data Menlo Park, CA U.S. Geological Survey (USGS) Biannual beach profiles were collected at 42 Oahu and 36 Maui Locations between August 1994 and August 1999. Surveys were conducted at approximately summer-winter intervals and extend from landward of the active beach to about -4 meters water depth. Profile data on this CDROM are presented in both Microsoft EXCEL 97/98 & 5.0/95 Workbook (.xls) format and comma separated value (.csv) format. Graphical representation of the surveys (x vs. z and x vs. y) are presented in EXCEL format only. Site descriptions, including beach location, directions to site, GPS information, and a description of Reference Points used, are available in both EXCEL and ADOBE ACROBAT .pdf format. This data set is intended for scientific research of beach Morphology and volume changes. Cross-shore beach profile data were collected as a component of the Hawaii Coastal Erosion Study, a cooperative effort by U.S. Geological Survey and University of Hawaii to document seasonal and longer-term variations in beach volume and behavior. The overall objectives of the Hawaii Coastal Erosion Study are to document the recent history of shoreline change in Hawaii and to determine the primary factor(s) responsible for coastal erosion in low-latitude environments for the purpose of predicting future changes and to provide quality scientific data that is useful to other scientists, planners, engineers, and coastal managers. The overall strategy consisted of first quantifying the magnitude and location of serious erosion problems followed by close monitoring of coastal change in critical areas. Bi-annual beach profiles were collected at over 40 critical beach sites on the islands of Oahu and Maui. Once sufficient background information is analyzed and key problems are defined, field sites will be selected for detailed process- oriented studies (both physical and biological) to gain an understanding of the complex relationships between reef carbonate production, sediment dispersal, and the interaction of man-made structures with sediment movement along the shore. Information derived from this project will be used to develop general guidelines for sediment production, transport, and deposition of low- latitude coasts. Planned major products include a comprehensive atlas of coastal hazards, journal articles and reports presenting results of our studies, and a "living" database of shoreline history and changes based on results of the beach profile monitoring and softcopy photogrammetric analysis. 08031994 08301999 ground condition Complete As needed -158.29727173 -157.64724731 21.7467823 21.24683571 none Beach Profile Cross-shore Transect Seasonal variability Coastal Erosion Beaches Beach Morphology Beach Monitoring Hawaii Coastal Erosion Study None Hawaii Oahu Pacific Islands Pacific Ocean USA None Please recognize the U.S. Geological Survey (USGS) as the source of this information. Although these data have been collected by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. This information is not intended for navigational purposes. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. United States Geological Survey, Coastal and Marine Geology Bruce M. Richmond Geologist mailing address

USGS, MailStop 999, 345 Middlefield Road

Menlo Park CA 94025-3561 USA (650) 329-5060 (650) 329-5190 brichmond@usgs.gov This Program is jointly funded by the US Geological Survey, Coastal & Marine Geology Program and University of Hawaii. Microsoft Excel 97/98 & 5.0/95 Workbook, Adobe Acrobat (.pdf) The data have been thoroughly analyzed for gross inaccuracies. Data that resemble a typical beach profile are considered accurate. Obvious rod-height errors and erroneous points were either corrected or removed from the data set. Notations are included in the data file where these modifications were made. For an inventory of beach profile sites, approximate locations, and Dates surveyed, please refer to the document "Oahu_Profiles.txt". For a list of morphologic codes used, please refer to the document "prof_codes.pdf". +/- ~5 m +/- ~1 m Cross shore beach profiles were measured using a Geodimeter 464 total station and swimming rodman. The total station was set up at a non-specific position on the beach. Up to five permanent reference points were first surveyed to establish the position of the station relative to the established profile line. Beach profile measurements were then taken from a point landward of the active beach to as far offshore as conditions would allow (typically -4m water depth). Specific morphologic features (high water, berm crest, top of beach toe, etc.) were noted. Data were post-processed as follows Survey data were downloaded from the Total Station memory, automatically creating a RAW file and an associated JOB file. The RAW file was used to generate a PTS file (UTM field coordinates are extracted from the RAW file) Note: no recalculation is performed on the original file). PFCODE.EXE was used on the JOB file to generate an ED file. The ED file was edited to include necessary Program 10 information, Points block listing, and INFO codes. Field procedures were checked and corrected as necessary. PFGD.EXE was used on the ED file to generate a PF file (Cartesian- based, relative XYZ coordinates). Extraneous lines were removed from the PF file to generate a DAT file (relative XYZ coordinates) DAT files were compiled into a SUMMARY file (Excel) format, plotted, and where necessary, corrected relative to a primary reference point. Where GPS positions of the reference points were available, the entire summary file was re-referenced to an absolute vertical elevation (meters above the Local Hawaii Tidal datum). 1999 X, Y, and Z points, registered to a primary reference point along the individual beach profile. Some profiles have been re-referenced to the Local Hawaiian Tidal datum using surveyed and adjusted GPS positions at profile locations. 0.000001 0.000001 Decimal degrees Local, referenced to profile primary Reference Point (RP) or Local Hawaii Tidal datum (LTD) .001 meters Explicit elevation coordinate included with horizontal coordinates United States Geological Survey, Coastal and Marine Geology Ann E. Gibbs Geologist mailing address

USGS, MailStop 999, 345 Middlefield Road

Menlo Park CA 94025-3561 USA (650) 329-5060 (650) 329-5190 agibbs@usgs.gov Please recognize the US Geological Survey as the source of this information Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. This information is not intended for navigational purposes. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20010906 United States Geological Survey, Coastal and Marine Geology Ann E. Gibbs Geologist mailing address

USGS, MailStop 999, 345 Middlefield Road

Menlo Park CA 94025-3561 USA (650) 329-5060 (650) 329-5190 agibbs@usgs.gov Content Standard for Digital Geospatial Metadata ("CSDGM version 2") FGDC-STD-001-1998