Fluvial Systems, a. k. a. Rivers, a. k. a

Slides:



Advertisements
Similar presentations
ENTRY OF FLOW MEASUREMENT DATA
Advertisements

Bankfull / Effective / Dominant
The Graded River and Base Level
Streamflow and Runoff The character, amount, and timing of discharge from a basin tells a lot about flow paths within the basin Therefore, important to.
Lecture 4 Alluvial fans.
Water covers 71% of Earth’s surface and is the dominant agent governing environmental processes. The rates of human usage of water outpace the natural.
Chapter 14 River Systems and Landforms
Pertemuan Open Channel 1. Bina Nusantara.
FLOODS, STREAMS AND MEANDERS. GAUGING STATION On all major streams Measures Stream Height Height vs. Discharge (volume) Flood Stage and height above Flood.
Fluxes of water, sediment, and elements class 1.Introduce instrumentation and approach for surveying and flow gauging 2.Introduce and understand Manning’s.
Why Laminar Flow in Narrow Channels (Heat Transfer Analysis)
CLASS PLAN RIVER BEHAVIOR FLOW GAUGING MANNING’S EQUATION BANKFULL DISCHARGE DISCUSS MCPHEE.
Sculpting Earth’s Surface
Pipe Flow Considerations Flow conditions:  Laminar or turbulent: transition Reynolds number Re =  VD/  2,300. That is: Re 4,000 turbulent; 2,300
Freshwater – IB Geography
Sediment transport in wadi systems
River Environments Rivers have become regular features in the news. In any given year, one or more rivers become notorious for their devastating floods.
Factors affecting erosion and deposition Velocity Gradient – rise over run Channel shape Channel roughness Discharge – amount of water flow per unit.
Reynolds Number (Re) Re = R = A/P V = mean velocity  /  =  (which is kinematic viscosity) Re = VR(  /  ), where Driving Forces Resisting Force Re.
Discharge (Q) Define (cfs; m 3 /s or “cumecs”) Why is Q Important? How is it measured?
Fluvial Processes “the great sculptor of the landscape”
Fluvial Morphology: Landforms Made by Running Water
CHAPTER 19: SURFACE WATER. Water covers 71% of Earth’s surface and is the dominant agent governing environmental processes.
Chapter 14 River Systems and Landforms
THE HYDROLOGIC CYCLE. The Hydrologic Cycle The Hydrologic Cycle - Fresh Water Storage Reservoir % of Total Fresh Water Glaciers (Frozen)76% Groundwater22%
Flow Energy PE + KE = constant between any two points  PE (loss) =  KE (gain) Rivers are non-conservative; some energy is lost from the system and can.
Fluvial Processes. I. The Hydrologic Cycle 1)Precipitation.
Section 13.1 Streams and Rivers
The hydrologic cycle. Running water Streamflow Two types of flow determined primarily by velocity –Laminar flow –Turbulent flow Factors that determine.
Fluid Dynamics Stream Ecosystems. Fluid Dynamics Lecture Plan First consider fluids, stress relationships and fluid types Then consider factors affecting.
Why Study A Stream’s Velocity?
River Systems. I. Water Distribution 1.36 billion cubic km of water 97.2%oceans 2.15% glacial ice 0.65% lakes, streams, ground water.
Percolation Condensation Solar radiation Evaporation Sea Salt water Ground water Precipitation Transpiration Runoff in streams Copyright: McGraw-Hill.
Study Guide Chapter 17 1.Know and use the simple equation for discharge. Why is this equation important? 2.What is the gradient of a stream? 3.Describe.
Fluvial Environments Yukon River, Alaska
STREAMFLOW and HYDROGRAPH ANALYSIS Stream flow is one of the most important topics in engineering hydrology because it directly relate to water supply,
Public Meeting April 2, 2015 Albany Park Stormwater Diversion Tunnel.
Sediment Transport Stream Capacity - The capacity of a stream or river is the total amount of sediment a stream is able to transport comprised of three.
Aims today: To learn about: Channel Efficiency The Hydraulic Radius
River Systems. I. Water Distribution 1.36 billion cubic km of water 97.2%oceans 2.15% glacial ice 0.65% lakes, streams, ground water.
Sediment Transport Modelling Lab. The Law of the Wall The law of the wall states that the average velocity of a turbulent flow at a certain point is proportional.
Chapter 14 River Systems and Landforms Geosystems 5e An Introduction to Physical Geography Robert W. Christopherson Charlie Thomsen.
Class 25: Hydrology. Class updates:  Reading: Section Today’s topics:  Water on Earth  Water transport  Water and geology Class 25: Hydrology.
RACC High School Training June 26, 2012 Jody Stryker University of Vermont Introduction to Watershed Hydrology.
Water Resources Groundwater. Key definitions Zone of aeration – soil and rock are less saturated (some pores contain air) Zone of saturation- pores contain.
Running Water Day 2. Objective By the end of today, I will be able to: – Evaluate how materials are _____________in a stream and how they are _______________.
Chapter 14 River Systems and Landforms Geosystems 6e An Introduction to Physical Geography Robert W. Christopherson Charles E. Thomsen.
Earth Surface Oblate Spheroid = Largest Topo Feature of Earth
“the great sculptor of the landscape”
Evidence of Glacial Erosion in the Landscape
Hydrological changes resulting from dam construction
RUNOFF.
Water Budget III: Stream Flow
Sediment Transport Mechanics
Rivers.
Decomposition nonstationary turbulence velocity in open channel flow
Uniform Open Channel Flow
Chapter 13 Surface Water.
Stream Erosion and Deposition
Streams and Rivers Video: Grand Canyon.
Summary In addition to the oceans, where else is water found on Earth?
Stream Cross-Section for Q Measure V (current-meter) at 0.2 and 0.8 of depth Average V and multiply by (width * depth) Sum up across stream to get.
Discharge, stream flow & channel shape
The shapes of stream channels
Streams Hydrodynamics
Streams Hydrodynamics
CLASS PLAN RIVER BEHAVIOR FLOW GAUGING MANNING’S EQUATION
Rivers and Running Water
SIEVE RIVER: SIMULATION OF THE 19/11/1999 FLOW EVENT
Hydrologic Engineering
Presentation transcript:

Fluvial Systems, a. k. a. Rivers, a. k. a Fluvial Systems, a.k.a. Rivers, a.k.a. Channelized portions of the landscape Nizina river, Alaska

Flow in a parking muddy lot Turbulent Laminar

Effect of changing u* or zo

Law of the Wall

Laminar vs. Turbulent Velocity Profile Comparison

Empirical relationships for mean flow velocity Advantage – all we need is x-sect. A, and mean velocity How do we develop the relationship between stage and discharge?

Great photo of stream gauging…

The Manning Equation and Manning’s “n”

Salt Discharge Method

Consequences of RI>IC: Rise in Stage, Overbank Flooding

Rivers with impressive sediment loads – proglacial Kennicott River in full flood.

Floods – events of signif. morphologic change in rivers

Consequences of RI>IC: Rise in Stage, Overbank Flooding