FLOOD04125 - Laserfiche WebLink

Home Browse Search

I . , ~-~ I I I I I I I I I I I I I I I I- I Annual Data Analysis and Report Writing 1 nformal pNgress reports (not published) will be presented to .[ ==>spon.:Sorir.g agency<==) during the project. These progress reports will summarize data collection and analysis for th~, period. Annual data analysis will consist of examination of event data collected for what types of scour(s) (local, constriction, and general) may De occurring at the sampled bridge sites. Frcm data collected during the ever.ts, local scour depths will be estimated using the scour-prediction equations. These computed estimated local scours will be compared to the measured local scours and assessed as to which prediction equation(s) best reflect conditions observed in the field. Results will be presented informally to [==isponsoring agency<==) during the progress reports. Work on writing segments of the final published report not dependent upon the final data analysis will be completed during the 5 year data collection period. These report segments are the abstract, introduction, purpose and scope, acknowledgements, description of study sites, table of Jocal scour prediction equations used with variables defined, and data collection methods. A map of (==>study area<==] depicting the locations of the sampling sites will be generated. Graphics of bridge, pier, and channel geometry will be completed for each site. Phase J II Final Data Collection Final data collection at each site will inciude surveying all elevation reference marks, approach sections, and the bridge sections. Bed-materla, samples will be collected in scour holes and along the upstream side of the bridges for bed-material statistical size distributions. Geophysical techniques will again be used to collect channel subbottcm scour data at each bridge site to help in defining changes in the subbottom that may have occurred during the 5-year period of hlgh-flow data collection. Final Analysis of Data The final data analysis will consist of an examination of the event data collected to determine what types of scour(s) (local, constriction, and general) have occurred at the sampled bridge sites over the 5 years of data collection. From data collected during the events. local scour depths will be estimated using the scour-predlction equations. These computed local scour data will be compared to the measured local SCO,Jrs and assessed as to which prediction equation(s) best reflect conditions observed in the rield measurements. The final analysis of the data will also consist of a comparison of the physically measured local-scour data at the 20 b~idge sites with the geophysically defined local scour. A-7