Holistic Watershed Management for Existing and Future Land
Use Development Activities: Opportunities for Action for Local
Decision Makers: PHASE 2 - FDC APPLICATION MODELING

(FDC2A PROJECT)

SUPPORT FOR SOUTHEAST NEW ENGLAND PROGRAM (SNEP)
COMMUNICATIONS STRATEGY AND TECHNICAL ASSISTANCE

Final Report Appendix C
Runoff Duration Curves for HRU-Scale SCM Modeling

Scenarios
September 30,2022

Prepared for:
U.S. EPA Region 1

Prepared by:

Paradigm Environmental	Great Lakes Environmental Center

GleC

PARADIGM

ENVIRONMENTAL

Blanket Purchase Agreement: BPA-68HE0118A0001-0003
Requisition Number: PR-R1-20-00322
Order: 68HE0121F0052


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

1

0.1
0.01

0.001

15%

\0	\0	\0	\0	\p	vO	sp	\p	s.O	S.O	sp

OS	o\	ON	OS	0s"	0s-	0s-	o\	ON 0s*	ON

lti o lo o in o lo o to o lo
m>^-^fLnLnuDUDr-r~.oooo

Flow-Exceedance Percentiles (Wet Days Only)

0.001

Figure 1. Runoff duration curve for High control level infiltration basin on HSG A with an infiltration rate of 8.27 in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

0.001

«vO	\0	\0	\P	\0	S.O	\0	\0	\0	vO	SP	\u

OS	OS	OS	OS	OS	OS	oS	OS	oS	OS	OS	OS

LOOLnoLOOLnOLOOLno
rHrMrsimm^t^-LOLnaDaDrv

Sp Np	\P	\P	Np	nP

os os	os	os	os os

LD O	LO	O	LO	O

oo	oo	cn	o-i	o

Flow-Exceedance Percentiles (Wet Days Only)

Figure 2. Runoff duration curve for MS4 control level infiltration basin on HSG A with an infiltration rate of 8.27 in/hr.

2


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

0.001

vO	\0	VO	\P	\0	\0	\0	\U	\0	\U	\0	sp	\0	\0	\0

ON	ON	ON	ON	ON	0s-	0s-	0s"	0s-.	o\	ON	OS	ON	ON	ON

o lo o lo o lt) o U") o lo o in o lo o

vHTHrMr\inom>^-^fLnLnuDUDr-

s? s? s? s?

LO o LTI o

oo

Flow-Exceedance Percentiles (Wet Days Only)

Figure 3. Runoff duration curve for High control level infiltration basin on HSG A with an infiltration rate of 2.41 in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

in
<4-
U

O
c

3

cc

o

¦M

to

0.1

0.01

0.001

Flow-Exceedance Percentiles (Wet Days Only)

Figure 4. Runoff duration curve for MS4 control level infiltration basin on HSG A with an infiltration rate of 2.41 in/hr.

3


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

1

0.1
0.01

0.001

15%

\0	\0	\0	\0	\p	vO	sp	\p	s.O	sp	sp

OS	OS	ON	OS	0s"	0s-	0s-	o\	ON 0s*	ON

lo o lo o in o lo o to o lo
m>^-^fLnLnuDUDr-r~.oooo

Flow-Exceedance Percentiles (Wet Days Only)

0.001

Figure 5. Runoff duration curve for High control level infiltration basin on HSG B with an infiltration rate of 1.02 in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

0.001

3? 5? S?

O LO O

Sp	vp	vp	\p	sp	Sp	Sp	Sp	Sp	Sp	Sp

ON	0s-	OS	OS	OS	OS	OS	CDS	OS	OS	OS

LD O LO O LD O LO O LO O LO

m^t^t-LOLOLOior^r--cooo
Flow-Exceedance Percentiles (Wet Days Only)

Figure 6. Runoff duration curve for MS4 control level infiltration basin on HSG B with an infiltration rate of 1.02 in/hr.

4


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

Figure 7. Runoff duration curve for High control level infiltration basin on HSG B with an infiltration rate of 0.52 in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

sp sP NP \° \0 vP -sp n. O \0 \0 vO
0s-.	0\	q\	o\ qS.	0s-	0s*

LnOLnOLnOLnOLnom
ro^f^-LnLnixjiorvr^oooo

Flow-Exceedance Percentiles (Wet Days Only)

0.001

0.001

1

0.1
0.01

0.001

15%

Flow-Exceedance Percentiles (Wet Days Only)

Figure 8. Runoff duration curve for MS4 control level infiltration basin on HSG B with an infiltration rate of 0.52 in/hr.

5


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

Flow-Exceedance Percentiles (Wet Days Only)

Figure 9. Runoff duration curve for High control level infiltration basin on HSG C with an infiltration rate of 0.27 in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

in
<4-
U

O
c

3

cc

o

¦M

to

0.1

0.01

0.001

Flow-Exceedance Percentiles (Wet Days Only)

Figure 10. Runoff duration curve for MS4 control level infiltration basin on HSG C with an infiltration rate of 0.27 in/hr.

6


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

1

0.001

ss s? ss

o ui o

Flow-Exceedance Percentiles (Wet Days Only)

Figure 11. Runoff duration curve for High control level infiltration basin on HSG C with an infiltration rate of 0.17 in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

1

0.1

0.01

0.001

Flow-Exceedance Percentiles (Wet Days Only)

0.001

Ss? 5? 5?
o lo o

Figure 12. Runoff duration curve for MS4 control level infiltration basin on HSG C with an infiltration rate of 0.17 in/hr.

7


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

0.001

Flow-Exceedance Percentiles (Wet Days Only)

Figure 13. Runoff duration curve for High control level infiltration basin on HSG D with an infiltration rate of 0.1 in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

in
<4-
U

O
c

3

cc

o

¦M

to

0.1

0.01

0.001

Flow-Exceedance Percentiles (Wet Days Only)

Figure 14. Runoff duration curve for MS4 control level infiltration basin on HSG D with an infiltration rate of 0.1 in/hr.

8


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

1

to

H-

u

O
c

3
DC

O
+->

0.1

0.01

0.001

0.001

10%

15%

vO	\0	\o	\0	\0	\0	\0	\0	\0	\U	N.O	\P

o\	o\ 0s- 0s- 0s- 0s" 0s-- on 0s* o\

O l0 O LD O LO O LH O LO O LT)
THrHrMrNjmm^-^LnLn

LO O

r*. oo

LO
00

\p

0s-

o

CD

VP
0s
LD

cn

SP

ds
O
O

Flow-Exceedance Percentiles (Wet Days Only)

Figure 15. Runoff duration curve for High control level infiltration basin on HSG D with an infiltration rate of 0.05 in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

iouDi--f--oooacriaio

Flow-Exceedance Percentiles (Wet Days Only)

Figure 16. Runoff duration curve for MS4 control level infiltration basin on HSG D with an infiltration rate of 0.05 in/hr.

9


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev


<4-

u

3=
o
c

3

a:
E
o

4->
«/)

0.1

0.01

0.001

Flow-Exceedance Percentiles (Wet Days Only)

Figure 17. Runoff duration curve for High control level infiltration trench on HSG A with an infiltration rate of 8.27
in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

i/i
<+-
u

O
c

3

cc

o

4->

to

0.1

0.01

0.001

Flow-Exceedance Percentiles (Wet Days Only)

Figure 18. Runoff duration curve for MS4 control level infiltration trench on HSG A with an infiltration rate of 8.27
in/hr.

10


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

to

H-

u

O
c

3
DC

O
+->

0.1

0.01

0.001

Flow-Exceedance Percentiles (Wet Days Only)

Figure 19. Runoff duration curve for High control level infiltration trench on HSG A with an infiltration rate of 2.41
in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

*/)
•4-
U

O
c

3

cc

o
+->

0.1

0.01

0.001

Flow-Exceedance Percentiles (Wet Days Only)

Figure 20. Runoff duration curve for MS4 control level infiltration trench on HSG A with an infiltration rate of 2.41
in/hr.

11


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

to

H-

u

O 0.1
c

3
DC

O

& 0.01

1

0.1
0.01

0.001

15%

\0	\0	\0	\0	\p	vO	sp	\p	s.O	sp	sp

OS	o\	ON	OS	0s"	0s-	0s-	o\	ON 0s*	ON

lti o lo o in o lo o to o lo
m>^-^fLnLnuDUDr-r~.oooo

Flow-Exceedance Percentiles (Wet Days Only)

0.001

Figure 21. Runoff duration curve for High control level infiltration trench on HSG B with an infiltration rate of 1.02
in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

Figure 22, Runoff duration curve for MS4 control level infiltration trench on HSG B with an infiltration rate of 1.02
in/hr.

Sp	-sp	\0	vp	\p	\P	sp	sP	Sp	Np	sP

o\	o\	0s-	os	o\	0s-	os	os	os	os

LD O LO O Lf) O LO O LO O LO
m^-^tmLnuDUDr^-r^ooco

Flow-Exceedance Percentiles (Wet Days Only)

0.001

12


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs

Pre-Dev

0.001

Flow-Exceedance Percentiles (Wet Days Only)

1

0.1
0.01

0.001

15%

Figure 23. Runoff duration curve for High control level infiltration trench on HSG B with an infiltration rate of 0.52
in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

0.01

Figure 24. Runoff duration curve for MS4 control level infiltration trench on HSG B with an infiltration rate of 0.52
in/hr.

Sp	\0	sp	Sp	Sp	NP	Sp	Sp	\0	vp	sp

ON OS ON 0s- 0s- 0s- ON ON 0s- ON ON
LT) O LO O LT) O LTJ O U*1 O LH

m-^-^-LnLnu3UDr-r~~oooo

Flow-Exceedance Percentiles (Wet Days Only)

0.001

13


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

to

H-

u

O
c

3
DC

O
+->

0.1

0.01

0.001

Flow-Exceedance Percentiles (Wet Days Only)

Figure 25. Runoff duration curve for High control level infiltration trench on HSG C with an infiltration rate of 0,27
in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

*/)
•4-
U

O
c

3

cc

o
+->

0.1

0.01

0.001

Flow-Exceedance Percentiles (Wet Days Only)

Figure 26. Runoff duration curve for MS4 control level infiltration trench on HSG C with an infiltration rate of 0.27
in/hr.

14


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

1

0.001

ss s? ss

o ui o

Flow-Exceedance Percentiles (Wet Days Only)

Figure 27. Runoff duration curve for High control level infiltration trench on HSG C with an infiltration rate of 0.17
in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

0.001

3? 3? SS
O	O

vp	\0	\p	\0	\p	\p	\p	vp	\p	\p	\p

0"N	crs	0s-	0s"	OS	ON	ON OS	OS

LnOLnomOLnOLnoLn
m<3-<3-LnLnuDr-»r»ooco

Flow-Exceedance Percentiles (Wet Days Only)

Figure 28. Runoff duration curve for MS4 control level infiltration trench on HSG C with an infiltration rate of 0.17
in/hr.

15


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

to

H-

u

O 0.1
c

3
DC

O

& 0.01

0.001

ss ss s?

O LO O

vO	\0	\0	\0	\p	vO	sp	\p	sp	sp	sp

QS	oN	ON	OS	0s"	0s-	0s-	o\	o\ 0s*	ON

lo o lo o in o lo o to o lo
m>^-^fLnLnuDUDr-r~.oooo

Flow-Exceedance Percentiles (Wet Days Only)

Figure 29. Runoff duration curve for High control level infiltration trench on HSG D with an infiltration rate of 0.1 in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

0.01

Figure 30. Runoff duration curve for MS4 control level infiltration trench on HSG D with an infiltration rate of 0,1 in/hr.

Sp	vp	vp	\p	sp	Sp	Sp	Sp	Sp	Sp	Sp

ON	0s-	ON	0s-	ON	ON	ON	ON	ON	OS	OS

LO O LO O LO O LO O LO O L0

m^t^t-LOLOLOior^r--cooo
Flow-Exceedance Percentiles (Wet Days Only)

0.001

16


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FDC 2A Project

Appendix C

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

\0	N.O	\0	\0	vP	\0	yO	\P	\0	vO	\p

OS (js OS o\ o> OS o\	ON On OS

LOOLnoLnOLnoLOOLn
m^t^j-LnLnuD^r^r^oooo

Flow-Exceedance Percentiles (Wet Days Only)

0.001

Figure 31. Runoff duration curve for High control level infiltration trench on HSG D with an infiltration rate of 0.05
in/hr.

	Post-Dev, no BMPs 	Post-Dev, with BMPs 	Pre-Dev

sp	vO \p \0 vO	-sp vO	vO	vO	\p \p

o\ oS OS OS OS OS OS OS OS OS OS

LnotnomOLnOLnOLn
m^-<3-Lnu"iuDU3r-.r-.oooo

Flow-Exceedance Percentiles (Wet Days Only)

0.001

Figure 32. Runoff duration curve for MS4 control level infiltration trench on HSG D with an infiltration rate of 0.05
in/hr.

17


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