Quiz 5 Key

Quiz 5 Key - Quiz 5 CE 361 November lst 2007 21 pts...

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Unformatted text preview: Quiz 5 CE 361 November lst, 2007 21 pts Available Name: \. BE SURE TO INCLUD ALL UNITS IN YOUR CALUIATIONS AND SHOWALL WORK! ! Multiple Choice Que ' ns g2 points eachl 1. Hydrologist often break a stream’s hydrograph up into baseflow and a. Storm flow b. Response Flow c. Top Flow (1. Quick Flow 2. Synthetic unit hydrograph is used when: a. No runoff observations are available in a particular watershed. b. There are changes to the land use within the watershed c. .When there is a change to the duration of the unit hydrograph. d. No information is provided about the soil type and the percent of impervious area Within the watershed 3. Is it reasonable for a unit hydrograph to assume a linear response from a watershed? a. Yes, because a watershed always responds linearly to a storm event b. No, because soil conditions are continually changing c. No, because a watershed never responds linearly to a storm event (1. Yes, because its inaccuracies are less then the inaccuracies of determining the amount of excess rainfall 4. Which drainage pattern occurs in faulted areas where streams follow a more easily eroded fractured rock in fault lines? a. Trellis Pattern b. Lattice Pattern c. Rectangular Pattern d. Dendritic Pattern 5. Which soil type typically has the highest CN value for any land use type? a. Deep Sand, deep loess b. Shallow loess, sandy loem c. Clay loem, shallow sandy loem d. Heavy plastic clays 6. Name three basic assumptions of a unit hydrograph (3 pts) - Exam") Vain-Lu“ has Ox COfiS*N\>T \h\'e.r\%-\)r “DRUM-MN 3(‘l’wa (Redrst ducok'mfl J - EXCQSS Tc)..t\[\\-a~\\ '8 0h: (‘MWA Chm maxi/)1, QYCCA 3 - TN (Lucoé‘ribfl 0(' AW“)? (WOOD; “13-Aer £03m any->5 mmgo‘\\ r m scams ol- a\\ cams Mt; asacufiaym WA 0\ CDM‘MOQ 5mm}? tmoH— dmfalhm ore, C3 \W—fa fill)?” 3% ’\'\r\n... 30mm}? 01f (2.5 War} NEW: Atee; iv ‘0 Q.qu “360:3 mph 3 ' Fe? O\ LIQONSYQS l JYW hP-grofia?\\ “LSLAVHU £45m 0‘ 3%“ “(9.35 (‘CX\‘\£¢:~\\ m e “We” WW3 chomdtrxakcas O? m wcfiresshr). V *MCQVUMOUQ“ *lNL {fix-Ht, mm\ 7. In the lecture we discussed three types of streams; intermittent, ephemeral, and perennial. Explain under what circumstances these three streams appear. (3 pts) T-HX-exmksetm‘r S¥mM~ Horn during emu MSW ‘E‘Phemum\ $\mm$"¥lcixo duc‘j Ox“ ‘3)‘D‘N3 ?€Fe“nxa\ SAlWNS * C0(\3Yu\u~0w3 “Fth 8. Compute the'runoff from 4—in rainfall of a 1500—acre watershed that has hydrologic soil groups that are 50% group A and 50% group C interspersed through the watershed. The land use is 90% residential area (30% impervious), and 10 percent paved roads with curbs. Assume AMC 11 conditions. (5 pts) _ nun-u Residential (30 % impervious) 57 Road (with curbs) ...
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This note was uploaded on 07/02/2008 for the course C E 361 taught by Professor Reed,patrickmichwalters,geoffrey during the Winter '07 term at Penn State.

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Quiz 5 Key - Quiz 5 CE 361 November lst 2007 21 pts...

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