1. CEE 3430, Engineering Hydrology David Tarboton

2. Overview Handouts Web: http://www.engineering.usu.edu/dtarb/cee3430
Syllabus
Schedule
Student Information Sheet
Homework 1
Web:
Outline for today
Review Syllabus and Schedule
Introduce the Hydrologic Cycle and Water Balance Concepts
CEE 3430 – Spring 2011

3. Texts
CEE 3430 – Spring 2011

4. Course Learning Objective
Upon successful completion of the course you should be able to apply the principles of hydrology to solve engineering hydrology design problems involving hydrologic modeling and analysis.
CEE 3430 – Spring 2011

5. Specifically (1)
Identify and describe the processes and quantities involved in the hydrologic cycle. (Bedient Ch 1)
Quantify the components of the water balance of a watershed. (Bedient, Ch 1)
Calculate hydrologic losses due to evaporation and infiltration. (Bedient, Ch 1)
Calculate hydrographs based on streamflow and precipitation measurements, watershed attributes and unit hydrograph theory. (Bedient, Ch 2)
CEE 3430 – Spring 2011

6. Specifically (2)
Assemble the data and parameters specific to a given problem and location. Demonstrate skill in the selection of appropriate parameters and the ability to evaluate the sensitivity and uncertainty in parameters and the implication for selection of design alternatives. (Bedient, Ch 5)
Formulate problems and prepare inputs to use hydrologic engineering software (computer models) for analysis and design. Summarize and synthesize outputs from these computer models. (Bedient, Ch 5)
CEE 3430 – Spring 2011

7. Specifically (3)
Quantify the probability associated with extreme hydrologic events and the magnitude of hydrologic events of specified recurrence interval and frequency. (Bedient, Ch 3)
Identify and describe the physical factors, mechanisms and processes involved in the transformation from rainfall to runoff. (Tarboton module Ch 1-3)
Quantify the hydrologic properties of water in soils (Tarboton module Ch 4)
Calculate infiltration and surface runoff from precipitation on a watershed soil surface. (Tarboton module Ch 5-6)
Quantify the flow of groundwater and evaluate the impacts of well pumping on groundwater flow and properties. (Bedient, Ch 8)
Design hydrologic solutions to drainage, culvert and flooding problems. (Bedient, Ch 9)
CEE 3430 – Spring 2011

8. Learning Objective for Today
Be able to identify and describe the processes and quantities involved in the hydrologic cycle
Be able to apply the concept of mass balance to determine certain hydrologic quantities
Reading
Preface
Bedient Pages 1-15
Next time
Bedient Pages 15-43
CEE 3430 – Spring 2011

9. Great Salt Lake Evaporation
The Great Salt Lake has an average inflow from streamflow of acre ft / year
The area is about 1 million acres
Average annual precipitation on the lake is about 10 inches/year
What is the average annual evaporation ?
CEE 3430 – Spring 2011

10. Water Balance Atmospheric Water Soil Water Surface Water Groundwater
Change of Storage
Inflow – Outflow =

11. Watershed delineated on a topographic map

12. Watershed water balanceP
E+T Q S G

13. Streamstats http://water.usgs.gov/osw/streamstats/utah.html
CEE 3430 – Spring 2011

14. Figure 1-1 from Bedient: http://hydrology.rice.edu/bedient/
The Hydrologic Cycle
Atmospheric Moisture
100
Precipitation on land
Infiltration W a t e r b l
Groundwater flow
1 Groundwater
discharge
Surface discharge 61
Evaporation from land 39
Moisture over land
385
Precipitation
on ocean
424
Evaporation
from ocean
Surface
runoff
Impervious
strata
Groundwater
Recharge P
Snow
melt
Runoff
Evap ET
Evap
Streams
Runoff
Lake GW
Reservoir
Figure 1-1 from Bedient:

15. Water Resources Management
Hydrologic Science in the hierarchy from basic sciences to water resources management
Basic Sciences
Mathematics
Statistics
Physics
Chemistry
Biology
Geosciences
Geology
Soil Science
Atmospheric Science
Ocean Science
Glaciology
Geochemistry
Economics
Law
Sociology
Political Science
Engineering Hydrology
Agriculture
Forestry
Fluid Mechanics
Hydraulic Engineering
Meteorology
Hydrologic Science
Water Resources Management
Modified From: National Research Council Committee on Opportunities in the Hydrologic Sciences (COHS), (1991), Opportunities in the Hydrologic Sciences, Editor, P. S. Eagleson, National Academy Press, Washington, D.C.

16. Summary
The engineering hydrologist must be able to calculate or estimate various components of the hydrologic cycle to solve hydrologic problems
Drainage design, flood protection, water supply
The concept of the water balance is fundamental to much hydrologic analysis
Become comfortable converting units and working with “incompatible” units, it is an unfortunate fact of life
CEE 3430 – Spring 2011