{"id":296,"date":"2013-02-14T08:02:00","date_gmt":"2013-02-14T08:02:00","guid":{"rendered":"http:\/\/projectbaseline.nl\/2013\/02\/14\/2013-02-12-turbidity-test-vinkeveen-versus-toolenburgplas\/"},"modified":"2025-08-17T13:39:44","modified_gmt":"2025-08-17T12:39:44","slug":"2013-02-12-turbidity-test-vinkeveen-versus-toolenburgplas","status":"publish","type":"post","link":"https:\/\/projectbaseline.nl\/?p=296","title":{"rendered":"2013-02-12 Turbidity test Vinkeveen versus Toolenburgplas"},"content":{"rendered":"

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Weather : Clear<\/span> \/ S wind 4<\/span><\/span> bft \/ Rain 0 mm \/ 1009<\/span>.8 <\/span>hpa<\/span><\/div>\n

Divers : Rick, Jan,Jack,Arthur, Axel,<\/span><\/span><\/span><\/span><\/span><\/span><\/span>
Goal : Get sediment sample and do a visibility reading with Secchi 10 cm<\/span><\/span><\/span>
Max depth : 9.6<\/span> mtr<\/span><\/span>
Duration : 48 <\/span>minutes<\/span><\/span>
Air temp : 0.0 celsius<\/span><\/span>
Water temp : 2.4<\/span> celsius minimum<\/span><\/span>
Fish: > few<\/span> Perch, Ruff, <\/span> <\/span><\/span>
Dutchi visibility: 6.5<\/span><\/span><\/span> mtr<\/span><\/span>
Secchi visibility: 9.0 mtr <\/span><\/span>
Plants:bronmos<\/span><\/span><\/span>
Comment: Just out of curiousity I took a sample of the bottom next to the bus at 9,6 mtr depth.<\/span><\/span><\/span><\/span>
Since I also have the bottom sample of Toolenburgplas from 26 mtr I decided to do a little turbidity test.<\/span><\/span><\/span><\/span><\/span><\/span>
Now ofcourse comparing them is not really <\/span>good.. because I should have taken a sample from Vinkeveen from the same depth as Toolenburg. <\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>
Left sample tube represents the Toolenburgplas sample which consists of clay<\/span> <\/span><\/span><\/span><\/span><\/span><\/span>
Right sample tube represents the Vinkeveen sample which mainy consists of sand and peat.<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>
I gave both tubes a good shake and to photo’s to see what happens.<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

Offcourse it is no surprise that clay takes way longer to settle than sand. Even after two hours the Toolenburg sample remains a little turbid (just look at the bottom end where the sediment is). <\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>
Under the microscope Toolenburg sample holds tiny clay plates<\/span><\/span> and some diatoms. There’s is life in that tube with active copepods swimming around. The Vinkeveen sample is without life t<\/span>hough and I have found 1 diatom.<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

It is clear that Toolenburg is very prone to bad visibility with wind blowing over the surface. That wind creates a natural current in the water which keeps clay particals airborn. Especially when fish and or divers agitate <\/span>the sediment.<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> <\/p>\n

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Weather : Clear \/ S wind 4 bft \/ Rain 0 mm \/ 1009.8 hpa Divers : Rick, Jan,Jack,Arthur, Axel,Goal : Get sediment sample and do a visibility reading with Secchi 10 cmMax depth : 9.6 mtrDuration : 48 minutesAir temp : 0.0 celsiusWater temp : 2.4 celsius minimumFish: > few Perch, Ruff,  Dutchi visibility: 6.5 mtrSecchi visibility: 9.0 … <\/p>\n

Lees verder “2013-02-12 Turbidity test Vinkeveen versus Toolenburgplas”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-296","post","type-post","status-publish","format-standard","hentry","category-geen-categorie"],"_links":{"self":[{"href":"https:\/\/projectbaseline.nl\/index.php?rest_route=\/wp\/v2\/posts\/296","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/projectbaseline.nl\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/projectbaseline.nl\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/projectbaseline.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/projectbaseline.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=296"}],"version-history":[{"count":1,"href":"https:\/\/projectbaseline.nl\/index.php?rest_route=\/wp\/v2\/posts\/296\/revisions"}],"predecessor-version":[{"id":5165,"href":"https:\/\/projectbaseline.nl\/index.php?rest_route=\/wp\/v2\/posts\/296\/revisions\/5165"}],"wp:attachment":[{"href":"https:\/\/projectbaseline.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/projectbaseline.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/projectbaseline.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}