Secchi disk measurements have been an integral component of Minnesota's lake water quality assessment programs for some time; lake residents make periodic measurements and submit their readings to state and local agencies.
floppy disk | Hard disk drive | hard disk drive | Golden Disk Awards | Universal Disk Format | disk | Floppy disk | Alderson disk | Hard Disk 20SC | Hard Disk 20 | ESP-Disk | Double-sided disk | disk storage | Poincaré disk model | Macintosh External Disk Drive | Luigi Secchi | Disk storage | Disk partitioning | Disk'O | disk (mathematics) | Disk II | Disk formatting | Disk buffer | Disk | Direct-to-disk recording | area of a disk | Angelo Secchi |