<Li> w is the particle's settling velocity (in m / s). </Li> <P> In order to calculate the drag coefficient, the grain's Reynolds number needs to be discovered, which is based on the type of fluid through which the sediment particle is flowing; laminar flow, turbulent flow or a hybrid of both . When the fluid becomes more viscous due to smaller grain sizes or larger settling velocities, prediction is less straight forward and it is applicable to incorporate Stokes Law (also known as the frictional force, or drag force) of settling . </P> <P> Cohesion of sediment occurs with the small grain sizes associated with silts and clays, or particles smaller than 4φ on the phi scale . If these fine particles remain dispersed in the water column, Stokes law applies to the settling velocity of the individual grains, although due to sea water being a strong electrolyte bonding agent, flocculation occurs where individual particles create an electrical bond adhering each other together to form flocs . "The face of a clay platelet has a slight negative charge where the edge has a slight positive charge, when two platelets come into close proximity with each other the face of one particle and the edge of the other are electrostatically attracted ." Flocs then have a higher combined mass which leads to quicker deposition through a higher fall velocity, and deposition in a more shoreward direction than they would have as the individual fine grains of clay or silt . </P> <P> Akaroa Harbour is located on Banks Peninsula, Canterbury, New Zealand, 43 ° 48 ′ S 172 ° 56 ′ E ﻿ / ﻿ 43.800 ° S 172.933 ° E ﻿ / - 43.800; 172.933 . The formation of this harbour has occurred due to active erosional processes on an extinct shield volcano, whereby the sea has flooded the caldera creating an inlet 16 km in length, with an average width of 2 km and a depth of - 13 m relative to mean sea level at the 9 km point down the transect of the central axis . The predominant storm wave energy has unlimited fetch for the outer harbour from a southerly direction, with a calmer environment within the inner harbour, though localised harbour breezes create surface currents and chop influencing the marine sedimentation processes . Deposits of loess from subsequent glacial periods have in filled volcanic fissures over millennia, resulting in volcanic basalt and loess as the main sediment types available for deposition in Akaroa Harbour </P>

Name the agents responsible for the deposition of sediments