14) What is the discharge of a stream with a 90 foot width, 7 foot depth, and a
ID: 304817 • Letter: 1
Question
14) What is the discharge of a stream with a 90 foot width, 7 foot depth, and a stream velocity of 8 ft/sec?
C. 6540 cfs
D. 5860 cfs
15) Gravitational energy makes water move downstream. About what percent of this gravitational potential energy goes into the work of eroding the stream channel?
17) The following picture depicts an
stream gradient
18) The following is an example of an entrenched meander has no flood plains, no oxbow lakes, and a high degree of vertical erosion. This stream is classified as a
No answer text provided.
19) The following prograding delta is an example of a
No answer text provided.
23) An aquitard is
d. a body of porous rock with little permeability
30) The following diagrams reflects karst topography, which is underlain by
volcanic rock
32) On the diagram below, letter A depicts springs due to the aquitard and perched water table. Natural springs occur when
fault activity move aquifers to surface
33) The naturally occurring acid that dissolves limestone over time is
H2CO3, carbonic
34) Stalactites are cave formations that
form only near cave entrance
35) What type of mass wasting is shown in the following image?
creep
36) On the following mass movement diagram, which letter depicts the regolith?
Letter D
37) A coherent mass movement is a
slump
38) Mass Movement (mass wasting) is the
downslope movement of buildings, roads, and other structures
39) Regolith is
snow and permafrost
40) Geologists distinguish among different kinds of landslides based on four factors:1: Type of material; 2: velocity of movement; 3: ___________; and 4: environment of the movement
character of movement (coherent, chaotic, slurry)
41) What type of mass movement would be caused by ice melting on a volcano after an eruption?
rock slide
42) The following chaotic, mass movement involves solid rock free falling. This mass wasting is called
rock fall
43) Which Letter depicts the chaotic, water saturated debris flow?
Letter D
44) Which letter depicts the chaotic rock slide?
Letter D
45) Which letter points to the hummocks?
Letter D
47) Which letter points to the head scarp?
Letter D
49) On the slide forces diagram, which letter is the gravitational force?
Letter D
52) What type of mass movement is La Conchita slide?
debris flow
53) Would you purchase a home near letter A on this photo?
A. 4560 cfsExplanation / Answer
14- B (5040 cfs) since discharge=width*depth*velocity
17-Alluvial fan( since the sediments are spread along the hill slope in the plane area).
18- Stage I ( Since the entrenched meanders form in the hilly region which comes under stage I area of river, it forms due to upliftment of tbe region following by the erosion)
19- Wave dominated delta ( Since the sand bar is parallel to the coastline in the picture which is the case of wave dominated delta. In tide dominated delta, sand bars are perpendicular to the coastline).
23- d (a body of porous rock with little permeability) for example a silty sand which slows down the flow of water through it due the persence of silt.
30- Carbonate rock ( karst topography is a irregular topography which forms by the dissolution of the underground carbonate rock).
32- The water table intersects the ground surface.
33- H2CO3 carbonic ( H2O+CO2=H2CO3, it forms by mixing the atmospheric CO2 in rain). it reacts with carbonate and dissolve it by making bicarbonate which goes in solution.
34- Grow from the cave ceiling to the floor
35- Creep ( due to the temperature variation the upper part of the soil expands and then due to gravitational effect it comes down again, so it is a very slow process of mass movement, in this tree trunks get bend and poles are also bends).
36- Letter C (regolith is the weathered cover of the underlying rock)
37- Slump ( Movement of a coherent mass along a curved plane).
38- Downslope movement of rock, regolith, snow and ice.
39- Soil, loose sediment and debris formed by the weathering of the underlying rock.
40- Character of movement ( coherent, chaotic, slurry).
41- Lahar
42- Rock fall (since the rock is falling directly to tbe groung, not any sliding).
43- Letter C.
44- Letter B (since the blicks are sliding down along a planar surface which is curved in this case).
45- Letter D.
47- Letter A.
49- Letter D.
52- Slump ( slide along concave upward surface).
53- No, I know about mass wasting a d this is in a difinite hazard zone.
Sorry for question 15.
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