Geology UT-
What is the probability that a 10 year flood will happen in any given year?
10%
For approximately how long (in hours) was the river flooded (over its banks)?
20
Which well location would be the most suitable to use for an injection well?
A
What kind of slope failure is shown in this photo?
A Landslide, Alaska 1964, triggered by earthquakes
What kind of slope failure is shown in this photo?
A Landslide, Columbia River. Arid region was being farmed - irrigation weakened the soil leading to a landslide
Which of these factors do you think are important in the formation of barrier islands?
A and C sediment supply and sea level not changing Spit - longshore currents Barrier Islands - waves and wind
Along the course of the diversion, the stream gradient will be ___________ than the gradient along the existing meander bend.
A greater
parallel ...predict how that will affect waves approaching the shore at an angle
A he wave-end closest to shore (A) will slow down causing the wave front to bend toward the beach.
f a glacier is in equilibrium (accumulation = ablation), what occurs at the terminus?
A sediment is deposited
stream channel is narrowed by bridge construction. How will the velocity of flow change if the depth and discharge of the stream remain constant?
A vel. increase
Downcutting rates are typically in the range of 5-50 cm per 1000 years. Which of the following downcutting rates seem reasonable?
A,B,E,F 0.5 mm per 10 years 2.5 mm per 10 years 0.25 mm per 100 years 2.5 mm per 100 years 25 mm per 100 years 250 mm per 1000 years
On which continents do you think glaciers are active today?
Africa Antarctica Asia Europe Greenland North America South America
Which statement about sediment transport in rivers is FALSE?
Almost all sediment is moving in rivers most of the time.
Which hydrograph represents a flash flood?
B
Which letter identifies the confined aquifer?
B
Why did the septic system not contaminate the drinking water supply?
B
Which of the following statements regarding stream C must be true?
B Stream discharge in C is greater than in A or B.
What do you think uses the most water in the US today?
B energy industry
A series of elevated terraces (former wave cut platfroms) along an active plate boundary coast is evidence for:
B uplift of continitenal crust
Given your experience, how would you classify the Texas Gulf Coast? (choose all that apply)
B,C,E Deposition Coasts Passive Margin Coasts SUBMERGENT
What kind of slope failure is shown in this photo?
C Slump - poor engineering, poor design, poor construction
Approximately much more water is in groundwater than is in rivers and lakes?
C 100x
What is the discharge of a stream in a rectangular channel that has a cross-sectional area (width x depth) of 60 square meters, that is 40 kilometers long, and has a velocity of flow of 5 meters per second?
C 300 cubic meters per second
Which combination of variables is most likely controlling the stream velocity along the profile?
C gradient and discharge
Predict what would happen to sea level if rain fell continuously all over the world's oceans.
C stay same
Match the name to the number on the diagram.
Confined aquifer - 1 Artesian well - 2 Perched aquifer - 3 Unconfined aquifer - 4 Spring - 5 Recharge zone - 6 Water table - 7 Aquiclude - 8
The cross section below simplifies the groundwater sources in a county in a Midwest state. Which location would have the potential for the best
D
What kind of slope failure is shown in this photo?
D Debris flow (California, 2003) - wildfires stripped the vegetation, then later rains caused mudflows
A stream channel is widened by erosion, but stream discharge is unchanged. Which of the following statements must be true?
D depth decreased and/or velocity decreased
If rain falls on a gentle slope, which scenario will increase recharge of an unconfined (open) aquifer?
D heavy rain on sand
If one person drills a 20 m deep well and finds a reliable water supply, what can his neighbor conclude?
D- he might find it might not
On which marine terrace would you expect to find the oldest marine fossils?
E 3rd marine terrace
What kind of slope failure is shown in this photo?
E rockfall cliff above
Meandering rivers primarily occur where?
In areas of shallow slope with flood plains
A "hydrograph" is best described as a plot of ________.
River discharge (y axis) against time (x axis).
Which of the following would make the best aquifer or oil/gas reservoir?
Sandstone with many connected pores
match
Spring : intersection of water table Artesian well : in confined aquifer Cone of depression : devolps around wells Aquifer : rock with pore space Aquiclude : shale layer
A rock can be porous but not permeable
TRUE
In addition to the three we discussed, which of these do you think changes or shapes coastlines? (Choose all that apply)
Tides Tectonic processes Biologic processes Sea level changes Human influences ALL
At which location in the diagram below would the waves break closer to the beach?
a
Surfers prefer Hawaiian waves to the Texas Gulf Coast because (choose all that apply)
a & d longer fetch and strong winds = bigger waves
Which of the following can influence the size of floods?
all
What kind of slope failure is shown in this photo?
b Creep - the trees have adjusted to the slow movement downslope
What is the probability that in any given year, there will be 100-year flood?
b 1%
What happens during a glacial retreat?
b Less ice is supplied to the terminus of the glacier.
A likely natural response would be:
b Reduced groundwater infiltration—increased flooding
ignerous rock
crystallize out of molten rock magma
There was a 500 year flood on the Blanco River in Texas in May 2015. When will the next one be?
d No way to tell. Could be tomorrow, could be 3015.
mathematical with discharge and velocity
d=va
All else equal, a larger hydraulic gradient will cause groundwater to flow __________.
faster
By definition, below the water table pores in a sandstone would be ____.
filled with water
metamorphic
form under high pressure and sometime look squeezed like marble limestone slate gnuess. temp press time
river vocal
gradien:slope of land discharge:volume of water carried gel:speed of river headwaters:where starts base:where the rive ends up (sea level)
A rock that has large, abundant pores, but these pores are disconnected would have ________.
high porosity and low permeability
The height of the water in a well in an unconfined aquifer indicates
level of water table
The Edwards Aquifer is developed in what type of rock?
limestone
sedimentatry
made from sand mud pebbles and stones or chemical process
fill in
nearby confined : stay the same nearby unconfined: drop
What do you need to use to convert centimeters on a map to kilometers in real life?
scale bar
In general, what kind of rock is most likely to have both high porosity and high permeability?
sedimen.
Hydraulic gradient of an unconfined aquifer is ________.
slope of groundwater table
You should be able to identify the Berm, Swash Zone, Forebeach and backbeach. On this image, identify the forebeach by clicking in that region.
water goes across on sand
