STORMWATER MODELING FOR REDEVELOPMENT IMPACTS ON THE BERKELEY NEIGHBORHOOD OF DENVER, COLORADO

Transcription

1 STORMWATER MODELING FOR REDEVELOPMENT IMPACTS ON THE BERKELEY NEIGHBORHOOD OF DENVER, COLORADO American Water Resources Association 2015 Annual Conference November 18, 2015 Chelsea Panos Terri Hogue, Lisa Cherry, Kathryn Lowe, John McCray Colorado School of Mines

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3 Project Goals: Utilize stormwater modeling to evaluate impacts of unregulated infill development in Denver Increasing Urbanization and Infill Development Knowledge Gap Berkeley Neighborhood Case Study Data Collection and Initial Modeling Efforts 2

4 Urbanization is increasing in the US and around the world 3 cnrc.navy.mil

5 Land cover change due to urbanization impacts the hydrologic regime 4 mdcoastalbays.org

6 There is a significant knowledge gap regarding reurbanization on stormwater 5 The Denver Post, 2015

7 The EPA does not require NPDES stormwater permit coverage for the small land parcels often involved in redevelopment 6

8 Science Question: How will land use change due to unregulated redevelopment (infill) impact stormwater quantity and quality in semi-arid regions of the western US? 7 conservationmagazine.org

9 In the next ten years, the population of the City of Denver is expected to grow by more than 100,000 people 8 The Denver Post, 2015

10 An area expected to experience increased urbanization specifically from redevelopment is the Berkeley neighborhood of west Denver Sheridan Tennyson Federal 9

11 Therefore, the Berkeley neighborhood catchment is used as a case study for researching the hydrologic impacts of infill development 1.74 square miles ~11,000 people 10

12 The land use of the Berkeley neighborhood is currently mostly single family residents 53% impervious 80% impervious 11

13 The storm sewer network drains by gravity to a single point at the north end of the watershed, then flows on to Clear Creek untreated 12

14 The storm sewer network drains by gravity to a single point at the north end of the watershed, then flows on to Clear Creek untreated 13

15 Stormwater from the neighborhood feeds into the Willis Case Golf Course, which will be used for the development of BMPs to treat upstream runoff 100% potable water irrigation 80 million gallons a year 14

16 The EPA s System for Urban Stormwater Treatment and Analysis INtegration (SUSTAIN) model is used to determine current and future stormwater quantity and quality Input parameters and data sets Hydrology Calibration / Validation Water Quality Validation BMP Calibration BMP Scenarios Output analysis 15

17 For modeling purposes, the watershed is split up into 14 subbasins following 3 storm sewer paths to the outlet 1 Outlet

18 The SUSTAIN model will be calibrated and validated based on hand-collected water quality and event-based storm data 17 onsetcomp.com

19 Thus far, the second storm sewer path is being calibrated in SUSTAIN using flow data from the stilling well and precipitation data from RainVieux Berkeley Lake Stilling Well 10% of total basin area 54% impervious 18

20 This single storm sewer path shows a diurnal response, highlighting the sensitivities of hydrology on the parcel scale Water Level (ft) Berkeley Lake Stilling Well Water Level 12:00am 12:00pm 12:00am 12:00pm 12:00am Sunday Monday Tuesday Wednesday Thursday 9/20/15 0:00 9/22/15 0:00 9/24/15 0:00 9/26/15 0:00 Date/Time 12:00pm 12:00am 12:00pm 19

21 Berkeley Lake Inlet - Initial SUSTAIN Results Flow (cfs) Estimated Flow (cfs) Precipitation (in) Precipitation (in) /28/15 21:36 9/29/15 12:00 9/30/15 2:24 Date/Time

22 Berkeley Lake Inlet - Initial SUSTAIN Results Flow (cfs) Estimated Flow (cfs) SUSTAIN Flow Results (cfs) Precipitation (in) Precipitation (in) /28/15 21:36 9/29/15 12:00 9/30/15 2:24 Date/Time

23 Although I am just getting started, this research holds great promise for predicting impacts from infill development in order to best inform stormwater infrastructure needs 22 logicalprojects.co.uk

24 Future work includes more data mining, installing more sensors, full watershed calibration, informed BMP design, and climate change scenarios 23 foxandhoundsdaily.com

25 Thank you for your time! Questions? Chelsea Panos Colorado School of Mines Acknowledgments: The Engineering Research Center for Reinventing the Nation s Urban Water Infrastructure (ReNUWIt) The National Science Foundation (NSF) The City and County of Denver Darren Mollendor The Colorado School of Mines (CSM) Dr. Terri Hogue, Dr. John McCray, Kathryn Lowe, Lisa Cherry 24