Lake Valentine - Arden Hills, MN, Bethel University - 2008
Date	Time	Volunteer	TP (ml) sample	TKN (ml) sample	CLA (ml)	Secchi Disk Depth (m)	Surface Temp (C)	Air Temp (C)	Comments
5/1/08	12:00	Kistler	50	50	750	0.87	11.2	19.4	Rain all Friday April 26, breakup April 17, a lot of sediment in the water, yellow to brownish, from runoff and mixing
5/15/08	12:30	Kistler	50	50	750	0.77	17.6	21.5	Water yellow with a slight greenish tinge. SD depth is shallow with sediment and algae present. Coontail matt is starting to form out from the shoreline, but still beneath the surface about 30 cm with no surface matt yet.
5/30/08	1:30	Kistler	50	50	1000	2.14	17.6	18.6	Cool for the last several weeks. Water is very clear to the point where you can see large bullheads swimming on the bottom. A coontail mat is developing the ferst 10 meters from shore, but is still below the surface .5 - 1 meter allowing for easy canoeing out from shore. No other macrophyte was sighted today. Cloudy with thinning clouds. Traces of rain the last couple of days but nothing major, just cool.
6/13/08	12:00	Kistler	50	50	1000	1.65	20.9	19	Remaining cool. Tstorms, rain and clouds most of this week. Water level higher then normal, beyond the end of the dock. Boating still easy as coontail mat is staying below the surface, but now right at the surface in some patches. Coontail is the only species seen along with some duckweed along the shore.
6/26/08	12:30	Kistler	50	50	1000	2.24	26.1	27	An aphanizomenon bloom was floating through the entire water column. Coontail mat 100 ft at the SE end by the college. Some Potomogeton present but very minor.
7/10/08	11:00	Kistler	50	50	1000	2.13	25.4	27.5	Little rain the last two weeks. Shore is dense with coontail, a mat algae, and duckweed 60 feet from dock on SE end, less on other lakeshore margins. Aphanizomenon is only just barely present now and no other major algae was visually present with a good SD depth. Nuphar is blooming.
7/24/08	11:30	Kistler	50	50	1000	1.82	25.5	25.5	Heavy rain and runoff 7/20/08. Macrophytes are down some, but still about 20 feet on SE end with border margin around rest of lake. Nuphar, coontail, with a surface coat of duckweed. Water color clear but somewhat light green-brown with some floating visible plant, most likely still some Aphanizomenon.
8/7/08	1:30	Kistler	50	50	1000	1.95	26.5	28	Very dense mat to about 20 feet beyond the end of the dock (coontail, mat algae, duckweed and then as it thins some Nuphar). Lake water clear with no visible algae or floating components.
8/23/08	1:00	Kistler	50	50	1000	2.035	24.1	20.4	Cold front came in over night on 8/22 with wind on 8/22 and 8/23. Macrophtes end about 10 feet of end of the dock on the SE end. This is the first sample in which I have seen significant visible zooplankton.
9/6/08	12:00	Kistler	50	50	750	1.03	20.5	19.2	Temperatures have been cooling off. Littoral macrophytes are declining. Definite algae or sediment in the water column.
9/17/08	1:00	Kistler	50	50	1000	3.185	19.6	25.7	Macrophytes continue to decline with most coontail .5 m below the surface. SE shoreline has considerable duckweed, but otherwise the lake is very clear and open.
10/3/08	1:00	Kistler	50	50	750	1.835	16.4	14.3	First week with cool nights in low 40s. Most coontail now sunk down below .5 meter. Aphanizomenon still present in floating water column. Water fairly clear.
10/18/08	11:30	Kistler	50	50	1000	2.25	12.6	12.3	Lake level up about 6". Still some clearly floating filamentous algae (Aphanizomenon) as well as plant parts, but other than a few Nuphar, the lower littoral submerged macrophytes are pretty much gone for the season.