Revisiting simple methods to estimate drop size distributions: a novel approach based on infrared thermography

Title:

Revisiting simple methods to estimate drop size distributions: a novel approach based on infrared thermography

Creator:

de Lima, João L.M.P., Silva Jr., Valdemir P., de Lima, M. Isabel P., Abrantes, João R.C.B., and Montenegro, Abelardo A.A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:098439fe-2831-4d3d-b930-808f9285cf1f
uuid:098439fe-2831-4d3d-b930-808f9285cf1f
doi:10.1515/johh-2015-0025

Subject:

rainfall, thermography, drop size distributions, and drop diameters

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The infrared thermography has been successfully applied as a tool for high resolution imaging in different hydrological studies. This exploratory experimental study aimed at evaluating the possibility of using infrared thermography to determine the diameter of raindrops. Rain samples are collected on a pre-heated acrylic board, which is exposed to rain during an instant, and thermograms are recorded. The area of the thermal stains (''signatures'' of the raindrops) emerging on the board is measured and converted to drop diameters, applying a calibration equation. Diameters of natural raindrops estimated using this technique were compared with laser disdrometer measurements; the Nash-Sutcliffe efficiency coefficient was used for evaluating the match between the resulting histograms of drop size distribution. Results confirm the usefulness of this simple technique for sizing and counting raindrops, although it is unsatisfactory in light rain or drizzle.

Language:

Slovak

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

220-227

Source:

Journal of hydrology and hydromechanics | 2015 Volume:63 | Number:3

Harvested from:

CDK

Metadata only:

false