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Hydrologic and Hydraulic Guidelines for Dams in Texas


Quiz Questions

1.Dams more than 6 ft high fall under TCEQ jurisdiction and are to comply with TCEQ regulations on dam safety regardless of whether the TCEQ requires a water right for the impoundment.
True
False
2. A failure would be considered an unintended release of impounded water due to the loss of all or a portion of the dam or affiliated structure.
True
False
3. All freeboard calculations should include the expected future settlement and consolidation of the embankment after construction in addition to wave run-up.
True
False
4. The intent of the precipitation analysis is to find the _____________________ that would produce the most critical loading on the dam.
Critical storm size,
Location,
Orientation,
Duration,
All the above
None of the above
5. The PMP depths for a particular storm size and range of storm durations are not used to determine the critical storm duration for a dam.
True
False
6. The Snyder Unit Hydrograph Method and the NRCS Dimensionless Unit Hydrograph Method are the two commonly used precipitation loss methods.
True
False
7. NRCS Hydrologic Soil Groups and Uniform Infiltration (Loss) Rates are shown in _________.
Figure 5.1
Figure 5.2
8. Typically, two parameters are needed to develop a Snyder Unit Hydrograph and they are _________.
TL, lag time & T lead time
Cp, shape factor & T lead time
Cp, shape factor & TL, lag time
9. How many parameters are used in the NRCS Unit Hydrograph method?
One
Two
Three
10.In models that require routing of the design-storm runoff hydrographs through a stream channel, either a hydrologic or hydraulic routing method may be used. These hydrologic methods are either empirical or semi-empirical.
True
False
11. Level Pool Routing is the most typically used method for routing a hydrograph through a reservoir in hydrologic models.
True
False
12. The con in a Kinematic Wave streamflow routing method is that the parameters cannot be estimated from field observations.
True
False
13.Emergency spillways are generally cut into an abutment and have little or no erosion protection from flows discharging through them.
True
False
14. ______________________ is a hydrologic condition where the inflow hydrograph is equal to the full design flood.
Design-flood breach
Sunny-day breach
15. The __________________is determined by the equation (Eq 8.3), which is LU = 0.012 * KS * sq root [ 2*C *H ]
Inundation length in miles
Total discharge from the breach