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Drainage Design Manual, Hydrology - Flood Control District of ...

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111<br />

34<br />

30<br />

27<br />

26<br />

<strong>Drainage</strong> <strong>Design</strong> <strong>Manual</strong> for Maricopa County<br />

<strong>Hydrology</strong>: Appendices<br />

113 o<br />

34 o 112 o o<br />

T8N<br />

T7N<br />

T6N<br />

T5N<br />

T4N<br />

T3N<br />

R2E<br />

R10W R3E<br />

R3W R1W<br />

R4E<br />

R9W R8W R7W R6W R5W R4W R2W R1E<br />

R5E R6E R7E R8E R9E R10E R12E<br />

T8N<br />

R11E<br />

Bell Rd<br />

Northern Ave<br />

Pecos Rd<br />

34<br />

o<br />

Sarival Ave<br />

115th Ave<br />

67th Ave<br />

19th Ave<br />

40th St<br />

Pima Rd<br />

Gilbert Rd<br />

Power Rd<br />

T2N<br />

T1N<br />

T1S<br />

T2S<br />

T3S<br />

T4S<br />

McDowell Rd<br />

33 o<br />

8<br />

10<br />

17<br />

10<br />

112<br />

o<br />

o<br />

60<br />

113 o Baseline Rd<br />

33<br />

T5S<br />

T6S<br />

T7S<br />

T8S<br />

T9S<br />

T10S<br />

R10W<br />

R9W R8W R7W R6W R5W R4W R3W R2W<br />

R1W<br />

R1E<br />

T3S<br />

T4S<br />

T5S<br />

T6S<br />

T7S<br />

T8S<br />

T9S<br />

T10S<br />

R3E<br />

R4E<br />

R5E R6E<br />

R7E<br />

T1N<br />

T1S<br />

T2S<br />

T7N<br />

28<br />

28<br />

34<br />

R9E<br />

T6N<br />

28<br />

T5N<br />

32<br />

29<br />

34<br />

T4N<br />

28<br />

27<br />

29<br />

R10E<br />

R11E<br />

T3N<br />

30<br />

29<br />

26<br />

27<br />

28<br />

R12E<br />

T2N<br />

30<br />

27<br />

26<br />

28<br />

29<br />

29<br />

0 5 10 20 30 40 50<br />

Miles<br />

27<br />

Figure A.1<br />

100-YR, 2-HR Precipitation<br />

Isopluvials (in tenth <strong>of</strong> inch)<br />

Maricopa County, Arizona<br />

30<br />

Extrapolated from Isopluvial Figures A.7 & A.13 <strong>of</strong><br />

Hydrologic <strong>Design</strong> <strong>Manual</strong> for Maricopa County, Arizona<br />

and the Following Equations:<br />

Y 100 = 0.494 + 0.755(X 3 )(X 3 /X 4 )<br />

2-hr depth = 0.341(6hr) + 0.659(1-hr)<br />

31<br />

Where: Y 100 = 100-yr, 1 hr estimated value;<br />

X 3 = 100-yr, 6-hr value from precipitationfrequency<br />

maps;<br />

X 4 = 100-yr, 24-hr value from precipitation<br />

frequency maps;<br />

6-hr = isopluvial values from Figure 2.7;<br />

1-hr = Y value as computed above.<br />

100<br />

A-64 August 15, 2013

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