Irrigation and Thermal Buffering Using Mathematical Modeling

Authors

  • Yara Yasser Elborolosy

    The Albert Nerken School of Engineering at the Cooper Union, New York, NY 10003, US

  • Harsho Sanyal

    The Albert Nerken School of Engineering at the Cooper Union, New York, NY 10003, US

  • Joseph Cataldo

    The Albert Nerken School of Engineering at the Cooper Union, New York, NY 10003, US

DOI:

https://doi.org/10.30564/jees.v6i1.5959
Received: 13 September 2023 | Revised: 22 December 2023 | Accepted: 25 December 2023 | Published Online: 27 January 2024

Abstract

Two methods of irrigation, drip, and sprinkler were studied to determine the response of the Javits green roof to irrigation. The control study was dry unirrigated plots. Drip irrigation consisted of irrigation tubes running through the green roof that would water the soil throughout and sprinkler irrigation used a sprinkler system to irrigate the green roof from above. In all cases, the irrigated roofs had increased the soil moisture, reduced temperatures of both the upper and lower surfaces, reduced growing medium temperatures and reduced air temperatures above the green roof relative to the unirrigated roof. The buffered temperature fluctuations were also studied via air conditioner energy consumption. There was a 28% reduction in air conditioner energy consumption and a 33% reduction in overall energy consumption between dry and irrigated plots. Values of thermal resistance or S were determined for accuracy and for this study, there was little change which is ideal. A series of infra-red and thermal probe measurements were used to determine temperatures in the air and sedum. It was determined that the sprinkler irrigation did a better job than the drip irrigation in keeping cooler temperatures within the green roof. A Mann-Whitney U test was performed to verify the variation in moisture temperatures buffering energy consumption. By getting a p-value < 0.05, it indicates that the model is accurate for prediction and medium temperatures were statistically different.

Keywords:

Green roofs, Irrigation, Drip, Sprinkler, Thermal buffering

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How to Cite

Yasser Elborolosy, Y., Sanyal, H., & Cataldo, J. (2024). Irrigation and Thermal Buffering Using Mathematical Modeling. Journal of Environmental & Earth Sciences, 6(1), 19–32. https://doi.org/10.30564/jees.v6i1.5959