@article{3d23493b46d849a09ca3ec2860b44db5,
title = "A Multiyear Assessment of Irrigation Cooling Capacity in Agricultural and Urban Settings of Central Arizona",
abstract = "Irrigation water use associated with agricultural activities and urban green spaces provides substantial cooling effects and ameliorates heat in central Arizona. In this arid and semiarid area, evaluating the effect of irrigation on land surface temperature (LST) for different types of land use can improve decision making related to water resources management. In this work, we improved the simulation of urban and agricultural irrigation in the Variable Infiltration Capacity model through remotely sensed vegetation and irrigation parameters applied at high spatiotemporal resolution. We then conducted a multiyear (2004–2013) assessment of simulated LST with respect to ground observations and remotely sensed products finding overall good agreement. Overall, results show that irrigation of about 2 mm/day is required to reduce average daily LST by 1°C across the region. Numerical experiments with the validated model also reveal that irrigation leads to LST reductions of higher magnitude and greater spatial variability in croplands than in urban areas. Furthermore, we found that the role of interannual variations in cropping practices is more critical than year-to-year differences in climatic conditions for the evaluation of irrigation cooling capacity. Thus, remotely sensed vegetation products can serve a valuable purpose in quantifying LST reductions and irrigation requirements to achieve a target of heat amelioration.",
keywords = "MODIS, VIC, irrigation, land surface temperature, remote sensing, urban heat",
author = "Zhaocheng Wang and Vivoni, {Enrique R.} and Bohn, {Theodore J.} and Wang, {Zhi Hua}",
note = "Funding Information: This work is supported by NSF (SES−1462086 DCDC III: Transformational Solutions for Urban Water Sustainability Transitions in the Colorado River Basin) and NASA (80NSSC19K1198: Averting Drought Shortages in the Colorado River). Summer support from the UREX Sustainability Research Network and CAP‐LTER for Zhaocheng Wang is also acknowledged. The authors thank the contributions of the following individuals during various stages of this effort: Chenghao Wang, Eli R. Perez‐Ruiz, Giuseppe Mascaro, and Kristen M. Whitney. The authors also acknowledge the computing facilities at the ASU Advanced Computing Center. The source code of VIC can be found at GitHub ( http://www.github.com/tbohn/VIC/releases/tag/v1 ). The flux tower datasets and land cover map can be obtained from the CAP‐LTER Data Catalog ( http://sustainability.asu.edu/caplter/data/ ). The NLUD product can be downloaded from the U.S. Environmental Protection Agency ( https://www.epa.gov/iclus/iclus‐data‐southwest‐region ). Funding Information: This work is supported by NSF (SES?1462086 DCDC III: Transformational Solutions for Urban Water Sustainability Transitions in the Colorado River Basin) and NASA (80NSSC19K1198: Averting Drought Shortages in the Colorado River). Summer support from the UREX Sustainability Research Network and CAP-LTER for Zhaocheng Wang is also acknowledged. The authors thank the contributions of the following individuals during various stages of this effort: Chenghao Wang, Eli R. Perez-Ruiz, Giuseppe Mascaro, and Kristen M. Whitney. The authors also acknowledge the computing facilities at the ASU Advanced Computing Center. The source code of VIC can be found at GitHub (http://www.github.com/tbohn/VIC/releases/tag/v1). The flux tower datasets and land cover map can be obtained from the CAP-LTER Data Catalog (http://sustainability.asu.edu/caplter/data/). The NLUD product can be downloaded from the U.S. Environmental Protection Agency (https://www.epa.gov/iclus/iclus-data-southwest-region). Publisher Copyright: {\textcopyright} 2021 American Water Resources Association",
year = "2021",
month = oct,
doi = "10.1111/1752-1688.12920",
language = "English (US)",
volume = "57",
pages = "771--788",
journal = "Journal of the American Water Resources Association",
issn = "1093-474X",
publisher = "Wiley-Blackwell",
number = "5",
}