ce 374 k hydrology
Download
Skip this Video
Download Presentation
CE 374 K – Hydrology

Loading in 2 Seconds...

play fullscreen
1 / 16

CE 374 K – Hydrology - PowerPoint PPT Presentation


  • 109 Views
  • Uploaded on

CE 374 K – Hydrology. Second Quiz Review Daene C. McKinney. Atmospheric Moisture. Snow. Rain. Energy. Evaporation. Interception. Throughfall and Stem Flow. Snowpack. Snowmelt. Watershed Boundary. Surface. Pervious. Impervious. Infiltration. Evapotranspiration. Soil Moisture.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' CE 374 K – Hydrology' - gail-fowler


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
ce 374 k hydrology

CE 374 K – Hydrology

Second Quiz Review

Daene C. McKinney

runoff processes
Atmospheric Moisture

Snow

Rain

Energy

Evaporation

Interception

Throughfall and

Stem Flow

Snowpack

Snowmelt

Watershed

Boundary

Surface

Pervious

Impervious

Infiltration

Evapotranspiration

Soil Moisture

Percolation

Overland

Flow

Groundwater

Groundwater Flow

Evaporation

Streams and Lakes

Channel Flow

Runoff

Runoff Processes
  • Watershed
    • Terminology
    • Concepts
  • Streamflow
    • Components of hydrologic cycle affecting it
hydrographs
Basin Lag

Centroid of

Precipitation

Peak

Time

of Rise

Recession Limb

Rising Limb

Discharge, Q

Inflection

Point

Baseflow

Recession

Baseflow

Recession

Time

Beginning of

Direct Runoff

End of

Direct Runoff

Hydrographs
baseflow separation
Discharge, Q

Discharge, Q

Discharge, Q

Direct Runoff

Direct Runoff

D

Direct Runoff

E

B

B

B

A

A

A

C

C

Baseflow

Baseflow

Baseflow

Time

Time

Time

Baseflow Separation
  • Three techniques
    • Straight – line method
    • Fixed Base Method
    • Variable Slope Method
hydrologic measurement
Hydrologic Measurement
  • Climate
  • Precipitation
  • Surface Water
    • Flow
    • Stage
    • Rating Curve
unit hydrograph
D

C

B

A

G

Excess Rainfall

Time, t

Unit Hydrograph
  • Time – Area Relationship
unit hydrograph1
Unit Hydrograph
  • Derivation
reservoir routing
Reservoir Routing
  • Storage - Discharge Relationship
  • Level Pool Routing
river routing
River Routing
  • Muskingum Method
    • Prism Storage
    • Wedge Storage
scs dimensionless hydrograph
SCS Dimensionless Hydrograph
  • SCS developed a parametric UH model based on averages of UHs from a large number of small agricultural watersheds in the US.
  • A – watershed area
  • C – conversion factor for unit system
  • Tp- time to peak
  • Dt – excess precip duration
  • tlag - basin lag, time between center of rainfall excess and UH peak

Given ER hyetograph and time lag, then solve for time of UH peak, then UH peak

frequency analysis
Frequency Analysis
  • Recurrence Interval
  • Return Period: Average recurrence interval
  • Probability of an extreme event is related to the return period
extreme value distributions
Extreme Value Distributions
  • EV-I, EV-II, and EV-III
  • Extreme Value Type I (Gumbell) Distribution
frequency factors
Frequency Factors
  • In general
  • Normal
  • EV-I
  • LP-III: See table
hydrologic design
Hydrologic Design
  • Depth-Duration-Frequency Estimates
    • TP-40, Hydro-35, Asquith
  • I – D – F Curves
  • Design Hyetographs: distribute rainfall over time
    • SCS Hyetograph
    • Triangular Hyetograph
    • Alternating Block Method
ad