. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography PORE-WATER PRESSURE IN MISSISSIPPI DELTA SEDIMENTS 183 (Figure 1). Deployment was carried out aboard the Texas A&M Univer- sity Ship R/V Gyre. During a 4-h period after the probe was implanted, no piezometer readings were recorded while the electronic instruments were being installed on the platform (Figure 3). The probe was implanted only a few days prior to the passage of Hurricane Eloise near the site. Discussion Hydrostatic pressures (»«)
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography PORE-WATER PRESSURE IN MISSISSIPPI DELTA SEDIMENTS 183 (Figure 1). Deployment was carried out aboard the Texas A&M Univer- sity Ship R/V Gyre. During a 4-h period after the probe was implanted, no piezometer readings were recorded while the electronic instruments were being installed on the platform (Figure 3). The probe was implanted only a few days prior to the passage of Hurricane Eloise near the site. Discussion Hydrostatic pressures (»«) were measured at depths of approximately 1 and 15 m (actual mudline difficult to determine) below the mudline concurrently with the measurement of pore-water pressures (u,^) at depths of 8 and 15 m (Figure 2). When the sediment pore-water pressure exceeds the hydrostatic pressure {u,c > Wg) at an equivalent depth below the mud- line, the difference is expressed as excess pore-water pressure Ue â {Uu, â Wg). In order to compare the pore-water pressures measured at the 8-m depth with hydrostatic pressure, a value of kPa (10 psi) was added to pressure transducer #1 values for direct comparison with #2 transducer readings. Pore-water pressure is considered in equilibrium with the hydro- static pressure when the two are equal («» = m,â). Factors responsible for pore-water disequilibrium in sediments under certain geological conditions MISSISSIPPI DELTA EXCESS PORE WATER PRESSURE 80 bJ CC 3 m v» \ii oc o. UJ o Q. CO UJ u X bJ 60 - 40 20 - 0 ⢠-20 ⢠"PROBE IMPLANTED SEPT. 19, 1975. â 12 -10 INTENSE STORM ACTivmr nCNEASE \ DECREASE 8m DEPTH ,'^' mmmcANe stotse Crossover unexplained 15m DEPTH Note: Independent hydrostatic pressure n^easurements femaiped yirniallv constant following the storm. independent pore pressure nrteasyrem^tftscjanged ouring the elapsed time. X X J. X X X X X Q. 262 234 266 268 270 272 274 276 278 280 282 284 286 288 ELAPSED TIM
Size: 2401px × 1040px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionamericana, booksponsorlyrasismemb
