Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
HOPE KNOX 14 1 8.16 flushes/yr 355 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
4 m
(12 ft)
2 m
(5 ft)
52 ha
(128 ac)
838,528 m3
(680 ac-ft)
2 km2
(1 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

## [1] "No 2018 Secchi Disk Transparency Data"

Water Chemistry and Trophic State Parameters

Table Legend:

Color: Color (SPU), Alk: Alkalinity (mg/l CaCO3), SpCon: Specific Conductivity (\(\mu\)S/cm), pH: pH (standard units)

TP = Total Phosphorus (\(\mu\)g/L) – EC: Epilimnion Core, SG: Surface Grab, BG: Bottom Grab, PG: Profile Grab

SDT = Secchi Disk Transparency (m) – Min: minimum value, Avg: average value, Max: maximum value, n: number of months with Secchi readings per year, b: number of times Secchi disk was observed touching the bottom of the lake per year

Chl = Chlorophyll-a (\(\mu\)g/L) – Min: minimum value, Avg: average value, Max: maximum value
Year Color Alk SpCon pH TP-EC TP-SG TP-BG TP-PG SDT-Min SDT-Avg SDT-Max SDT-n SDT-b Chl-Min Chl-Avg Chl-Max
1985 4.7 31 14 10 2.4 3.4 4.3 5 4 3.3 3.3 3.3
1986 6.7 34 14 8 2.8 3.7 4.4 5 4
1987 8.3 35 10 2.3 3.2 4.5 7 4
1988 4.8 4 2.0 3.1 4.1 6 1
1989 2.3 3.1 3.7 6
1990 2.1 3.1 4.4 6 8
1991 7.0 33 7.1 10 2.3 3.5 4.6 6 4
1992 3.0 3.8 4.3 5 2
1993 3.6 4.1 4.4 3 7
1994 4.0 4.4 4.8 6
1995 4.0 4.3 4.5 6 5
1996 3.4 3.7 4.0 6
1997 2.8 3.8 4.5 6 8
1998 2.8 3.9 4.7 5 9
1999 2.3 3.7 4.4 5 14
2000 10.0 42 12 3.5 4.2 4.9 4 8 3.3 3.3 3.3
2001 4.0 4.2 4.3 2 2
2002 4.2 4.4 4.5 3 3
2011 11 3.5 3.5 3.5 1 1 4.7 4.7 4.7

Lake Chemistry and Trophic Summary Data - Overall Summary Values:

Avg Color Avg Alk Avg SpCon pH Avg TP-EC Avg TP-SG Avg TP-BG Avg TP-PG SDT-Min SDT-Avg SDT-Max SDT-n Chl-Min Chl-Avg Chl-Max
6.9 30 7.1 12 9.3 2 3.7 4.9 4.9 3.3 3.8 4.7

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1986-08-21
1987-08-04
1987-08-20
1991-09-06
2000-08-10
2011-08-10
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22 8.3 22 8.0 26 8.2 22 8.4 25 8.0 23 7.6
1 22 8.3 22 7.9 25 8.2 22 8.3 24 7.9 23 7.6
2 22 8.3 21 8.0 25 8.2 21 8.4 24 7.9 23 7.6
3 22 8.0 21 8.0 23 8.5 21 8.4 24 7.9 23 7.5
4 21 8.2 23 8.5 24 8.2

Most recent temperature and dissolved oxygen profile plots

Temperature (°C), Dissolved Oxygen (mg/L)