A resonating rainfall and evaporation recorder

Ryan D. Stewart, Rolf Hut, David E. Rupp, Hoshin Vijai Gupta, John S. Selker

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We propose a novel, accurate quantification of precipitation and evaporation, as needed to understand fundamental hydrologic processes. Our system uses a collection vessel placed on top of a slender rod that is securely fixed at its base. As the vessel is deflected, either by manual perturbation or ambient forcing (for example, wind), its oscillatory response is measured, here by a miniature accelerometer. This response can be modeled as a damped mass-spring system. As the mass of water within the collection vessel changes, either through the addition of precipitation or by evaporative loss, the resonant frequency experiences an inverse shift. This shift can be measured and used to estimate the change in the mass of water. We tested this concept by creating a simple prototype which was used in field conditions for a period of 1 month. The instrument was able to detect changes in mass due to precipitation with an accuracy of approximately 1 mm.

Original languageEnglish (US)
Article numberW08601
JournalWater Resources Research
Volume48
Issue number8
DOIs
StatePublished - 2012

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evaporation
rainfall
vessel
accelerometer
perturbation
water

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Stewart, R. D., Hut, R., Rupp, D. E., Gupta, H. V., & Selker, J. S. (2012). A resonating rainfall and evaporation recorder. Water Resources Research, 48(8), [W08601]. https://doi.org/10.1029/2011WR011529

A resonating rainfall and evaporation recorder. / Stewart, Ryan D.; Hut, Rolf; Rupp, David E.; Gupta, Hoshin Vijai; Selker, John S.

In: Water Resources Research, Vol. 48, No. 8, W08601, 2012.

Research output: Contribution to journalArticle

Stewart, RD, Hut, R, Rupp, DE, Gupta, HV & Selker, JS 2012, 'A resonating rainfall and evaporation recorder', Water Resources Research, vol. 48, no. 8, W08601. https://doi.org/10.1029/2011WR011529
Stewart, Ryan D. ; Hut, Rolf ; Rupp, David E. ; Gupta, Hoshin Vijai ; Selker, John S. / A resonating rainfall and evaporation recorder. In: Water Resources Research. 2012 ; Vol. 48, No. 8.
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