The sediment is not uniformly deposited along the length of the SLD. In general, sediment tends to build up near the check structures. To obtain an accurate determination of sediment deposition, it is necessary to take more frequent readings near these structures. Sediment thickness measurements will be taken at the locations that were used in Summers Engineering survey (March 1987). The distances from the structures and locations at which measurements were taken are documented, and the sites can reliably be resampled. Measurements were not taken equidistantly; upstream and downstream of the structures were sampled more intensively. A list of the locations to be measured in the checks is presented in Table 4.4.1
.