Urban Ecosystems

, Volume 17, Issue 4, pp 1095–1117 | Cite as

A comparative study of the water budgets of lawns under three management scenarios

  • Neeta S. Bijoor
  • Diane E. Pataki
  • Darren Haver
  • James S. Famiglietti


The fate of irrigation in urban ecosystems is highly uncertain, due to uncertainties in urban ecohydrology. We compared irrigation rates, soil moisture, evapotranspiration (ET), stomatal conductance, and water budgets of landscape ecosystems managed with different turfgrass species and irrigation technologies. The “Typical” landscape had a cool-season fescue and was irrigated by an automatic timer. The “Alternative1” landscape had a warm-season paspalum and a “smart” soil moisture sensor-based irrigation system. The “Alternative2” landscape had a cool-season native sedge and a “smart” weather station-based drip irrigation system. ET was measured with a portable closed chamber and modeled using a Penman-Monteith approach, and the two methods agreed well. The water applied to the Alternative1 was 54 % less than the water applied to the Typical landscape, and the water applied to the Alternative2 was 24 % less. Soil moisture was similar in the Typical and Alternative2, while Alternative1 was drier in spring. The stomatal conductance of sedge was lower than the other two species, but its ET was not lower due to higher leaf area. Irrigation efficiencies (ET/applied irrigation) were 57 - 58 %, 86 – 97 %, and 78 - 80 % for the Typical, Alternative1, and Alternative2 landscapes, respectively. Runoff was less than 2 % in each landscape, and excess irrigation primarily drained below the root zone. Differences in irrigation efficiency between landscapes were due mainly to irrigation application, which varied more than species water use. Smart irrigation systems provided substantial water savings relative to a timer-based system, and prevented significant drainage losses. The utilization of smart sensors was more important than the choice of turfgrass species for irrigation efficiency.


Urban water budget Evapotranspiration Turfgrass Soil moisture Urban irrigation 



We thank Tammy Majcherek, Joanne Watkins, Nandini Bijoor, Gabriel Giannini, Eric Sun, and Amit Masurkar for assistance in the field and lab. We thank two anonymous reviewers for providing helpful comments on earlier drafts of the manuscript. This research was supported by the National Science Foundation (HSD 0624177, BCS 0948914, and a Graduate Fellowship) and by the California Energy Commission PIER program (PIR-080005).


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Neeta S. Bijoor
    • 1
    • 2
  • Diane E. Pataki
    • 3
  • Darren Haver
    • 4
  • James S. Famiglietti
    • 1
    • 2
  1. 1.UC Center for Hydrologic ModelingUniversity of CaliforniaIrvineUSA
  2. 2.Department of Earth System ScienceUniversity of CaliforniaIrvineUSA
  3. 3.Department of BiologyUniversity of UtahSalt Lake CityUSA
  4. 4.University of California Cooperative ExtensionCosta MesaUSA

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