TY - GEN
T1 - Using a two-dimensional watershed model to estimate flood magnitude and frequency under changing climate
AU - Bai, Yang
AU - Duan, Guohong
N1 - Publisher Copyright: © 2015 ASCE.
PY - 2015
Y1 - 2015
N2 - A two-dimensional physical based hydrodynamic watershed model, HydroSed2D, was used to estimate the impact of climate change on flood magnitude and frequency in the Upper Santa Cruz River Watershed (USCRW) in the Southern Arizona. Hourly precipitation data from a Regional Climate Model (RCM), Weather Research and Forecasting model (WRF), for three periods, 1990-2000, 2031-2040 and 2071-2079, were used to quantify the impact of climate change on flood. Precipitation outputs from RCM-WRF model were bias-corrected using observed gridded precipitation data for three periods before directly used in the watershed model. The calibrated watershed model was applied to USCRW for simulating surface flow routing for the selected three periods. Simulated discharges are analyzed to obtain future flood magnitude and frequency curves. Results indicate that flood discharges for different return periods are increased: the discharges of 100-year and 200-year return period are increased by 3,000 and 4,000 cfs, respectively.
AB - A two-dimensional physical based hydrodynamic watershed model, HydroSed2D, was used to estimate the impact of climate change on flood magnitude and frequency in the Upper Santa Cruz River Watershed (USCRW) in the Southern Arizona. Hourly precipitation data from a Regional Climate Model (RCM), Weather Research and Forecasting model (WRF), for three periods, 1990-2000, 2031-2040 and 2071-2079, were used to quantify the impact of climate change on flood. Precipitation outputs from RCM-WRF model were bias-corrected using observed gridded precipitation data for three periods before directly used in the watershed model. The calibrated watershed model was applied to USCRW for simulating surface flow routing for the selected three periods. Simulated discharges are analyzed to obtain future flood magnitude and frequency curves. Results indicate that flood discharges for different return periods are increased: the discharges of 100-year and 200-year return period are increased by 3,000 and 4,000 cfs, respectively.
KW - climate change
KW - flood frequency
KW - flood intensity
KW - watershed model
UR - http://www.scopus.com/inward/record.url?scp=84935087745&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84935087745&partnerID=8YFLogxK
U2 - 10.1061/9780784479162.115
DO - 10.1061/9780784479162.115
M3 - Conference contribution
T3 - World Environmental and Water Resources Congress 2015: Floods, Droughts, and Ecosystems - Proceedings of the 2015 World Environmental and Water Resources Congress
SP - 1163
EP - 1172
BT - World Environmental and Water Resources Congress 2015
A2 - Webster, Veronica L.
A2 - Karvazy, Karen
PB - American Society of Civil Engineers (ASCE)
T2 - World Environmental and Water Resources Congress 2015: Floods, Droughts, and Ecosystems
Y2 - 17 May 2015 through 21 May 2015
ER -