Characterization of sediments by high-frequency echo-sounding

Acoustical facies analysis at the Ba Lat delta front (Red River Delta, North Vietnam)

“…Previous workers have characterized bottom sediments by means of high-frequency echosounding (Damuth, 1980;Forsgren et al, 1993;Chough et al, 2002). Forsgren et al (1993) used the acoustic signal patterns of the echogram to differentiate between fine-and coarse-grained sediment bottoms according to four criteria: roughness of the line surface, line thickness, occurrence of white line and echo.…”

“…Forsgren et al (1993) used the acoustic signal patterns of the echogram to differentiate between fine-and coarse-grained sediment bottoms according to four criteria: roughness of the line surface, line thickness, occurrence of white line and echo. Investigations by Clay and Leong (1974), Dunsinger et al (1981) and Cochrane and Dunsinger (1983) showed that inhomogenities in the sediment cause scattering of acoustic signals.…”

Studying and modeling of submerged aquatic vegetation environments seen by a single beam echosounder

“…Many studies have been carried out to characterize and monitor SAV with the echo time series of a single beam echo-sounder [9,10]. Without ground truth data and calibration, very little information about SAV is available.…”

Morphological Granulometric Analysis of Sediment Images

“…Samples of the same core taken at deeper pits (30-35 cm) are given a sufix 'b.' The silicious sediment spots have been selected considering results of (Forsgren et al, 1993). The selected samples fall under the following categories: sample 1(a) -fine and very fine sand, and coarse silt; sample 1(b) -coarse silt and very fine sand; sample 2 -coarse, medium and fine silt; samples 3(a), 3(b), 4(a), 4(b) -predominantly fine and very fine silt.…”