Watermark Limnological Weighted Secchi Disc
- Silk screened with black and white quadrants
- Stainless steel hardware
- Built-in 24 oz. zinc sounding weight
|77912||Limnological weighted secchi disc|
|Usually ships in 3-5 days|
- 20 cm diameter secchi disc
- 24 oz. zinc sounding weight
- (1) Stainless steel hardware secchi disc
- (1) Built-in 24 oz. zinc sounding weight
In The News
Lake Tahoe is one of the clearest lakes in the United States, helped by the relatively small size of its surrounding watershed and the granitic basin it sits in.
Around 1968, the first year that its clarity was measured by Secchi disk, Tahoe’s blue waters were even clearer than they are today. Measurements at that time show an average yearly clarity of more than 100 feet. But such clarity was never reported again as its waters began a decline that lasted well into the 1990s.
At that point, the decline of average annual clarity measurements leveled out and stabilized, which is better news than it sounds.Read More
A monitoring initiative named for Secchi disks encourages people across the world to test the water nearby from the end of June through mid-July.
It’s called the Secchi Dip-in and its organizers want anyone with the means to test their local water to do so and report back. The database is open to contributions from June 29 through July 21.
Volunteers, monitoring groups and professionals alike can contribute data to the Secchi Dip-in database. Turbidity data is the main information Secchi Dip-in organizers want to see, but they won’t turn down any kind of water quality data people contribute.
They encourage interested environmentalists to go out with someone who is experienced in testing for water quality to ensure data is accurate.Read More
As we hear more and more about algal blooms of different kinds across the United States, teams of scientists are working hard to ensure that they don't become our new normal. One project in Florida is taking a multi-disciplinary approach to the problem—including genetic analysis.
The team's work is part of a full-court press in Florida recently, making a serious push to understand what is triggering more frequent blooms. Jose Lopez, Ph.D. , of Nova Southeastern University , the primary investigator on the genetic analysis portion of the project, spoke to EM about the project and his work on it.
“This is a very good project,” explains Dr. Lopez. “We're excited about it, and it's a lesson in persistence.”