Modeling urban hydrology and green infrastructure using the AGWA urban tool and the KINEROS2 model

Yoganand Korgaonkar, Phillip Guertin, David C. Goodrich, Carl Unkrich, William G. Kepner, I. Shea Burns

Research output: Contribution to journalArticle

Abstract

Urban hydrology and green infrastructure (GI) can be modeled using the Automated Geospatial Watershed Assessment (AGWA) Urban tool and the Kinematic Runoff and Erosion (KINEROS2) model. The KINEROS2 model provides an urban modeling element with nine overland flow components that can be used to represent various land cover types commonly found in the built environment while treating runoff-runon and infiltration processes in a physically based manner. The AGWA Urban tool utilizes a Geographic Information System (GIS) framework to prepare parameters required for KINEROS2, executes the model, and imports results for visualization in the GIS. The AGWA Urban tool was validated on a residential subdivision in Arizona, USA, using 47 rainfall events (June 2005 to September 2006) to compare observed runoff volumes and peak flow rates with simulated results. Comparison of simulated and observed runoff volumes resulted in a slope of 1.00 for the regression equation with an R 2 value of 0.80. Comparison of observed and simulated peak flows had a slope of 1.12 with an R 2 value of 0.83. A roof runoff analysis was simulated for 787 events, from January 2006 through December 2015, to analyze the water availability from roof runoff capture. Simulation results indicated a 15% capture of the average monthly rainfall volume on the watershed. Additionally, rainwater captured from roofs has the potential to provide for up to 70% of the domestic annual per capita water use in this region. Five different scenarios (S1 - base, S2 - with retention basins, S3 - with permeable driveways, S4 - with rainwater harvesting cisterns, and S5 - all GI practices from S2, S3, and S4) were simulated over the same period to compare the effectiveness of GI implementation at the parcel level on runoff and peak flows at the watershed outlet. Simulation results indicate a higher runoff volume reduction for S2 (53.41 m 3 average capacity, average 30% reduction) as compared to S3 (average 14% reduction), or S4 (3.78 m 3 capacity, average 6% reduction). Analysis of peak flows reveal larger peak flow reduction for S2. S3 showed more reduction of smaller peak flows as compared to S4.

Original languageEnglish (US)
Article number58
JournalFrontiers in Built Environment
Volume4
DOIs
StatePublished - Nov 27 2018

Fingerprint

Hydrology
Watersheds
Runoff
peak flow
hydrology
infrastructure
watershed
runoff
information system
modeling
water
simulation
event
subversion
Roofs
roof
visualization
import
erosion
Values

Keywords

  • AGWA
  • GIS
  • Green infrastructure
  • Hydrologic model
  • KINEROS2
  • Semi-arid
  • Stormwater
  • Urban hydrology

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Urban Studies
  • Building and Construction

Cite this

Modeling urban hydrology and green infrastructure using the AGWA urban tool and the KINEROS2 model. / Korgaonkar, Yoganand; Guertin, Phillip; Goodrich, David C.; Unkrich, Carl; Kepner, William G.; Burns, I. Shea.

In: Frontiers in Built Environment, Vol. 4, 58, 27.11.2018.

Research output: Contribution to journalArticle

Korgaonkar, Yoganand ; Guertin, Phillip ; Goodrich, David C. ; Unkrich, Carl ; Kepner, William G. ; Burns, I. Shea. / Modeling urban hydrology and green infrastructure using the AGWA urban tool and the KINEROS2 model. In: Frontiers in Built Environment. 2018 ; Vol. 4.
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