Urban Watershed Monitoring – One Decade after Management Plan Implementation

Brian Boyer, P.E.

Environmental Engineering Manager

Kieser & Associates, LLC

536 E. Michigan Ave., Suite 300

Kalamazoo, MI 49007

(269) 344-7117

Over 20 Years of Excellence in Environmental Science & Engineering www.kieser-associates.com

Project Setting

Kalamazoo River Watershed

2,020 sq. miles

MICHIGAN Portage &

Arcadia Creek

Subwatershed

SCALE (MILES)

0 10 15 5

Lake Allegan

WMU

Project Setting

Portage & Arcadia (P/A) Creek subwatershed

(36,000-acres)

Stormwater Concerns

Phosphorus TMDL (2001)

50% load reduction requirement

Highly urbanized P/A

subwatershed

Stakeholders:

City of Kalamazoo

City of Portage

Western Michigan University

Others

2002-03 & 2013-14 Monitoring

Goals & Objectives: Compare creek monitoring data

before/after 10 years of WMP implementation

Methods: Automated sampling

Creek mouths

BMPs

Stream stations

Wet event sampling

Dry event sampling

Parameters: Rainfall, flow

TP, TSS

Temp, D.O., pH, Conductivity, ORP

• 15 BMPs since 1998 • 468.8 acres treated

including BTR (blue areas)

• 59.8% of campus

BTR Park

Off-Campus Contributing Areas

Campus SW Control Areas

2011 WMU TMDL Compliance

TMDL Goal 382 lbs/yr

1998 TMDL Baseline

764 lbs/yr

On-Campus Controls only

On-Campus and Off-Campus Controls

(i.e., offsets)

Off-Campus controls financially supported by WMU

2003-2013 Kalamazoo SCMs

Stormwater Control Measure (SCM)

Kalamazoo

Portage

Data Analyses

Methods

Flow and rainfall evaluation

Flow duration curves and/or flow reduction

Calculate loading (flow + sample results)

Quantify current EMCs

Compare/contrast past and present data

Portage ISCO Sampling

Wet Weather Event Summary

April 2013 - April 2014

Event YR Date Total

Rainfall

Total Runoff

Volume TP Load TSS Load TP EMC TSS EMC Peak Flows

(inches) (ft3) (lbs) (tons) (mg/L) (mg/L) (cfs)

1

2013

Apr 11 0.66 3,859,128 31.8 5.9 0.132 48.6 244

2 Apr 17-18 0.61 1,575,620 17.3 3.4 0.176 68.7 298

3 Apr 18-19 1.08 7,901,248 42.9 7.5 0.087 30.5 510

4 May 21 0.52 1,710,069 30.2 5.1 0.283 95.0 288

5 May 22-23 0.53 4,896,263 21.6 7.8 0.071 51.1 447

6 Jun 19-20 0.35 1,539,714 16.9 2.3 0.176 47.4 241

7 Jul 4 0.24 2,510,278 11.7 1.4 0.075 17.8 62

8 Aug 31-3 1.71 22,109,656 188.4 79.5 0.137 115.2 234

9

2014

Feb 20-21 0.36 5,916,761 60.2 19.5 0.163 105.5 149

10 Mar 11-12 0.08 2,827,453 30.4 9.0 0.172 101.8 75

11 Mar 19-20 0.33 11,667,829 217.4 20.6 0.298 56.4 136

12 Apr 3-4 0.46 19,306,324 139.9 47.9 0.116 79.6 302

Slide Title

Slide Title

Portage Creek Analysis

Portage Creek Analysis

Portage Creek Analysis

Portage Creek EMCs

Arcadia ISCO Sampling

Wet Weather Event Summary

April 2013 - April 2014

Event YR Date Total

Rainfall

Total Runoff

Volume TP Load TSS Load TP EMC TSS EMC Peak Flows

(inches) (ft3) (lbs) (tons) (mg/L) (mg/L) (cfs)

1

2013

Apr 18-19 1.13 581,015 4.8 1.1 0.131 59.7 49

2 May 23 0.72 381,013 2.5 1.1 0.105 89.6 55

3 Jul 28 0.28 32,919 0.2 0.03 0.110 33.6 4

4 Aug 7 1.41 459,389 9.3 1.9 0.323 134.7 78

5 Oct 4 0.48 78,108 0.5 0.2 0.104 64.1 1

6 Oct 31 1.63 388,130 7.9 0.7 0.326 56.4 46

7

2014

Mar 19-20 0.33 224,579 5.1 0.2 0.363 24.3 8

8 Apr 3-4 0.59 2,567,738 18.6 3.6 0.116 44.7 44

9* May 14-15 0.9 233,470 4.9 0.9 0.339 122.2 9

10* Jun 2 0.89 288,117 9.1 2.0 0.895 385.8 74

11 Jun 10-11 0.37 136,743 1.1 0.1 0.128 28.7 6

* Events 9 & 10 influenced by Arcadia Festival Site pond dredging May 2014

Slide Title

Slide Title

Slide Title

Arcadia Creek EMCs

Results & Findings

Measuring Success

Comparison of 2002-03 to 2013-14 results

Progress toward TMDL goals

Portage Creek

2002 – 2014 EMC Summary

Average EMC’s Average EMC’s

TP TSS TP TSS

mg/L mg/L % decrease % decrease

0.157 68.1 32% 15%

Arcadia Creek

2002 – 2014 EMC Summary

Average EMC’s Average EMC’s

TP TSS TP TSS

mg/L mg/L % decrease % decrease

0.267 94.9 35% 31%

Summary

Monitoring confirmed BMP calculation benefits

Substantial benefits following 10-yrs BMP

implementation TP & TSS EMC decreases

Reduced peak flows

Moderated average wet weather flows

Reduced flooding

BMPs NOT needed everywhere…rather strategic

placement

Special Thanks

PROJECT PARTNERS The FORUM of Greater Kalamazoo Western Michigan University City of Kalamazoo WWTP City of Allegan WWTP Kieser & Associates, LLC MDEQ

Parting Thoughts

Check your data!

Over 20 Years of Excellence in Environmental Science & Engineering www.kieser-associates.com

Questions?

Brian Boyer, P.E.

Environmental Engineering Manager Kieser & Associates, LLC

bboyer@kieser-associates.com