Secchi disk
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Secchi disk

A disk, divided into black and white quarters, used to gauge water clarity by measuring the depth at which it is no longer visible from the surface.

[After Pietro Angelo Secchi (1818-1878), Italian astronomer hired to test such a disk.]

Secchi disk

An instrument used for measuring the clarity of water, especially seawater. It consists of a circular plate divided into alternating black and white quadrants and attached to a long measuring tape. The plate is lowered into the water, and the depth at which it is no longer visible from the surface is recorded. The Secchi disk is named after its inventor, Italian astronomer Angelo Secchi (1818-1878). See also Secchi depth.

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Secchi depth			Prairie Creek Reservoir 2005 * 2006 [dagger][dagger] Secchi disk transparency (m) 0. Water quality assessment of Prairie Creek Reservoir in Delaware ... by Popovicova, Jarka / Proceedings of the Indiana Academy of Science			Sebat Sebate SEbE Sebesten sebi- Sebic sebiferous Sebiparous seborrhea seborrheic dermatitis seborrheic eczema seborrheic keratosis seborrhoea SEbS sebum SEC sec. Secale Secale cereale SECAM Secancy secant secateurs Secchi depth Secchi disk Secchi disk transparency secco Secco painting secede Seceder secern secernate Secernent secernment Secess secession Secession Church secessionism secessionist sech Seche Sechium Sechuana Seck Seckel Seckel pear Secle seclude secluded seclusion seclusionist			Secaucus Secaucus, New Jersey Secaucus, New Jersey SECB SECBE SECBNR SECBR Secbutabarbital SECBUU SECC SECC SECC2 SECC2 SECCA SECCA SECCA Seccession Seccession Seccession SECCF Secchi Secchi Secchi Secchi depth Secchi disc Secchi disc Secchi disk Secchi disk Secchi disk depth Secchi disk depth Secchi disk transparency SECCHI Electronics Box Secchi, Angelo Secchi, Pietro Angelo Secchia, Pietro SECCI Sección de Intereses de Cuba En Washington Sección de Protección Radiológica de la Sociedad Cubana de Física Seccional de Policía Judicial e Investigación SECCLEAR SECCM secco secco secco Secco painting SECCOG SECCOM seccos seccos SECCP SECCS SECCYD SECD SECD machine SECDA SECDC SECDEC SECDED

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Secchi disk (redirected from Secchi disk transparency)

Secchi disk
(redirected from Secchi disk transparency)