SECCHI DISK
Secchi disk
The Secchi disk is a plain white, circular disk 30 cm (12 in) in diameter used to measure water transparency in bodies of water. The disc is mounted on a pole or line, and lowered slowly down in the water. The depth at which the disk is no longer visible is taken as a measure of the transparency of the water. This measure is known as the Secchi depth and is related to water turbidity.
Secchi disk
The Secchi disk is a plain white, circular disk 30 cm (12 in) in diameter used to measure water transparency in bodies of water. The disc is mounted on a pole or line, and lowered slowly down in the water. The depth at which the disk is no longer visible is taken as a measure of the transparency of the water. This measure is known as the Secchi depth and is related to water turbidity.
Secchi disk
The Secchi disk is a plain white, circular disk 30 cm (12 in) in diameter used to measure water transparency in bodies of water. The disc is mounted on a pole or line, and lowered slowly down in the water. The depth at which the disk is no longer visible is taken as a measure of the transparency of the water. This measure is known as the Secchi depth and is related to water turbidity.