Modified hiltner dew balance to re-estimate dewfall accumulation as a reliable water source in the negev desert

Amber J. Hill, Noa Kekuewa Lincoln, Shimon Rachmilevitch, Oren Shelef

Research output: Contribution to journalArticlepeer-review

Abstract

Dew formation is an essential component of the water balance in dry ecosystems, but measuring dew is challenging due, in part, to its dependency on the surface on which it forms. We detail the use of a modified Hiltner dew balance to illustrate how more accurate measurements of dewfall may be obtained. Using a modified Hiltner dew balance, we measured dewfall in the Negev Desert continuously for 3 years (2013–2015). Data analyses examined the relationship between dew formation, rain events and other environmental parameters in order to re-evaluate the importance of dew in the water budget. In line with previous research, our findings demonstrate that dewfall is a substantial and stable input of water in the Negev desert, providing inputs in the dry summer and the wet winter. Our results show that while dewfall was larger and more prevalent in proximity to rain events, a notable portion of dewfall took place on days distant from any rain event. The Hiltner dew balance modifications proved to be reliable and increased the efficacy of measuring the quantity and timing of dew formation. This study demonstrates the importance of integrating dewfall data into decision-making models for dryland ecosystems and agriculture, as well as into climate models.

Original languageAmerican English
Article number2952
Pages (from-to)1-10
Number of pages10
JournalWater (Switzerland)
Volume12
Issue number10
DOIs
StatePublished - 1 Oct 2020

Keywords

  • Desert
  • Dew
  • Hiltner balance
  • Isotope
  • Water balance

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Geography, Planning and Development
  • Aquatic Science
  • Biochemistry

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