E8 
were noted in the time series headers. 
Throughout the experiment, two current meters, CM10 and CM20, were in 
a zone that experienced large bathymetric change. This necessitated moving 
the gauges up and down in order to ensure that they remained submerged in the 
water but were sufficiently far above the sediment surface. Gauge CM10 was 
moved up on 7 and 8 October and down on 9,11, and 18 October. Gauge 
CM20 was moved up on 7 and 8 October. Measurements of how far up or 
down these gauges were moved were recorded and the time series headers were 
modified. 
The electronics package at position 60 (Figure E1) was lost during the high 
waves of Hurricane Lili at approximately 0700 on October 11. The sensors at 
position 30 stopped functioning a few days later. 
DELILAH array data analysis 
Although several of the current meters were vertically adjusted to maintain 
submergence and to remain above the bottom, several of the shallower gauges 
would occasionally became exposed in the wave troughs, particulary during 
low tide. A technique for determining when the current meters were exposed 
is presented, and was used to mark time series headers with a data quality 
parameter for exposed sensors. Several methods for estimating gauge exposure 
could be envisioned, the one presented here was used since it was fairly simple 
to employ. This technique finds the lowest trough elevation in each pressure 
gauge record (Setra gauges), then determines if the position of the 
corresponding current meter is above the lowest trough. This was a reasonable 
approach, particularly for the primary cross-shore array, since the current 
meters and pressure sensors were only separated by 1.5m. The 10 current 
meters in the sub-arrays did not have co-located pressure gauges, so 
comparisons were made with primary cross-shore array pressure gages at the 
same cross-shore coordinate. Longshore homogeneity of the wave field was 
assumed. 
DELILAH array pressure gauges recorded offsets and daily variations 
which were corrected by comparison to the Paroscientific pressure gauge 
LA33 (gauge number 231) in the FRF’s permanent 8-m array. Gaps 
sometimes occurred in the data from gauge 231. If the gaps were less than 30 
minutes in length, interpolation was used to attain water levels for those times. 
On 20 October, 1990 gauge 231 stopped functioning, from that time forward, 
the tide gauge located at the end of the pier was used for water level 
comparisons (Gauge 1, Figure E3). The tide gauge was not used for correcting 
water levels through the entire experiment because the signal from this gauge is 
typically not as accurate as the signal from the Paroscientific gauge. It samples 
a single point every six minutes which results in a noisier signal. This method 
Appendix E Stationary Instrument Data 
