CAS ES 142 Final: BeachesShoresFinalExam
30 Jul 2018
School
Department
Course
Professor
Document Summary
Greater tidal prism and larger number of tidal inlets allows more sediment influx. Larger tidal range produces more zone for marsh development. Flood currents- flow landward into bay during the rising tide. Ebb currents- flow out of bays & inlets during falling tide. Slack water- no currents, occur at low & high tides ocean and bay water levels are equal. Tidal range and currents: microtidal tr < 2. 0 m. Mesotidal 4. 0 m > tr > 2. 0 m. *see formation of tidal wave diagram ppt10 slide 3. Tides can be separated into 3 time periods: 1/3 high tide, 1/3 low tide, 1/3 rising or falling. *see diagram ppt 10 slide 4 what tidal currents do: transport sand onshore and offshore. Keep tidal channels open and flushed of sediment. Longshore currents together with wave suspension of sand transports sand along the underwater beach. Controls coastal morphology: barriers, bays, lagoons, tidal inlets, marshes, tidal deltas.
