Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    so I'm a little confused about what hydraulic radius, wetted perimeter, cross sectional area ( and all those sort of things ) actually are, and how they change from the upper course to the lower course. also how could I answer a fifteen marker on this. can someone help pls???

    thank you
    Offline

    1
    ReputationRep:
    From my understanding, as the wetted perimeter increases, the hydraulic radius decreases as they are in an inverse relationship. The hydraulic radius is about how efficient the river is so as the wetted perimeter increases the hydraulic radius decreases meaning that the river is less efficient. On the other hand, if the wetted perimeter decreases then the hydraulic radius increases meaning the river is more efficient. The wetted perimeter is how much water is in contact with land in relation to its cross-sectional area.

    A good example would be when water spreads out on a delta more water is in contact with the land and doesn't have a great cross sectional area so as its wetted perimeter increases, its hydraulic radius/efficiency decreases resulting in deposition. Same thing with a meander - on the inside of the bend it is shallower meaning that the wetted perimeter is large so its hydraulic radius is low so has low efficiency causing deposition - this is the opposite for the outside of the bend.

    Hope that helps, if you have any more questions, I'll try to answer them!
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    What's your favourite Christmas sweets?
    Help with your A-levels

    All the essentials

    The adventure begins mug

    Student life: what to expect

    What it's really like going to uni

    Rosette

    Essay expert

    Learn to write like a pro with our ultimate essay guide.

    Uni match

    Uni match

    Our tool will help you find the perfect course for you

    Study planner

    Create a study plan

    Get your head around what you need to do and when with the study planner tool.

    Study planner

    Resources by subject

    Everything from mind maps to class notes.

    Hands typing

    Degrees without fees

    Discover more about degree-level apprenticeships.

    A student doing homework

    Study tips from A* students

    Students who got top grades in their A-levels share their secrets

    Study help links and info

    Can you help? Study help unanswered threadsRules and posting guidelines

    Sponsored content:

    HEAR

    HEAR

    Find out how a Higher Education Achievement Report can help you prove your achievements.

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.