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Open-File Report 2014-1245


Water-Level Measurements in Dauphin Island, Alabama, From the 2013 Hurricane Season


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Site Description

Dauphin Island

Dauphin Island is a populated, low-lying barrier island in the northern Gulf of Mexico (fig. 1). It is bordered by Mobile Bay to the east, Mississippi Sound to the north and west, and the Gulf of Mexico to the south. Dauphin Island is frequently exposed to the force of hurricanes from the Gulf of Mexico, the most recent of which was Hurricane Katrina in 2005, which breached the western portion of the island.

Site 965

Site 965 was at a residence off St. Stephens Street. An Onset Hobo U20–001–04 atmospheric pressure sensor was mounted in a PVC tube that was hose clamped to the second floor porch railing of the residence.

Site 966

Site 966 was in a small channel in an empty lot on the Mississippi Sound side of the island about 200 m to the west of St. Stephens Street. An RBR DR1060 pressure sensor was mounted in a well buried in the beach.

Site 967

Site 967 was on the beach on the Mississippi Sound side of the island and to the north of the public parking lot at the western end of the island. An RBR DR1060 pressure sensor was mounted in a well buried in the beach. The sensor at site 967 could not be located for recovery, so the data were lost.

Site 968

Site 968 was on the Gulf of Mexico side of the island at a residence on Bienville Boulevard. An RBR Virtuoso D|wave was mounted in a well buried in the beach and strapped to a piling on the southeastern side of the residence. The piling the instrument was strapped to was in the swash zone of the beach at high tide when the instrument was deployed. About 0.6 to 0.8 m of sediment had accumulated at this site between deployment and recovery, completely burying the well (fig. 8) and making recovery difficult.

Site 969

Site 969 was on the Mississippi Sound side of the island in a small channel near Sam Houston Road. An Onset Hobo U20–001–01 pressure sensor was mounted in a well buried in the beach.

Site 970

Site 970 was on the Gulf of Mexico side of the island at a residence on Bienville Boulevard. An RBR DR1060 was mounted in a well buried in the beach and strapped to a piling on the southeastern side of the residence.

Site 971

Site 971 was on the Gulf of Mexico side of the island at a residence on Seneca Street. An RBR DR1060 was mounted in a well buried in the beach and strapped to a piling on the southwestern side of the residence.

Site 972

Site 972 was along the beach on the Mississippi Sound side of the island. An RBR DR1060 pressure sensor was mounted in a well buried in the beach.

Site 973

Site 973 was directly between sites 971 and 972 in the middle of the island. An Onset Hobo U20–001–04 pressure sensor was mounted in a well buried in the sand.

Site 974

Site 974 was in the middle of the island between sites 967 and 968 in a lot behind a home on Bienville Boulevard. An Onset Hobo U20–001–01 pressure sensor was mounted in a well buried in the sand.

Site 975

Site 975 was in the middle of the island in a channel in an empty lot just off St. Stephens Street and between sites 966 and 970. An Onset Hobo U20–001–04 pressure sensor was mounted in a well buried in the sand.

Site 976

Site 976 was along the beach on the Mississippi Sound side of the island very near the inlet of the canal next to St. Stephens Street. An Onset Hobo U20–001–01 pressure sensor was mounted in a well buried in the beach. Sometime before recovery, a large pile of sand (about 1 m high by 2 m in diameter) was placed over the sensor location and had to be removed so the instruments could be recovered.

Click on figure for larger image.

Thumbnail image for Figure 1, Locations of sites on Dauphin Island, Alabama, used to monitor water levels, atmospheric pressure, and temperatures from July 22 through November 20, 2013..

Figure 1. Locations of sites on Dauphin Island, Alabama, used to monitor water levels, atmospheric pressure, and temperatures from July 22 through November 20, 2013. Red dots on map indicate locations of sites. Inset base from the National Atlas of the United States, 2009. Aerial photo base from the U.S. Department of Agriculture, National Agricultural Imagery Program, 2011.

Thumbnail image for Figure 8, Photographs illustrating burial of well at site 968.

Figure 8. Photographs illustrating burial of well at site 968. A, View of porch piling and the well at site 968 immediately after deployment; the well is at the base of the piling the farthest to the left in the picture. B, The well at site 968 strapped to piling shortly after deployment. C, View of porch piling with well completely buried just before recovering sensor from well. D, U.S. Geological Survey scientist digging out the well at site 968.

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