deterministic model

syn for process model.

discharge (flow)

rate at which a volume of water (or more broadly, total fluids plus dissolved/suspended load) passes a given point (volume/time). Syn: streamflow.

discharge (sediment)

rate at which the sediment mass (or volume) in a stream (washload, suspended, and bedload) passes a given point (mass/time). Syn: sediment flux.

divergence of the drift

the rate of change of longshore transport of sand QR along a beach: L @QR = MQR/MR where R is distance along the beach.

drainage basin

the entire area from which drainage is received by a river, lake, or other body of water. Syn: drainage area, catchment basin, watershed.

drift

see littoral drift.