Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
DEDHAM HANCOCK 23 1 0.18 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
23 m
(75 ft)
14 m
(45 ft)
17 ha
(42 ac)
2,304,638 m3
(1,868 ac-ft)
1 km2
(0.2 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 2017 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
1984 7.8 8.1 8.4 2
1985 7.0 30 6 12.0 8.3 10.2 12.3 4
1990 5.5 31 7.2 4 8.8 7.7 9.6 11.0 5 0.7 1.3 3.1
2015 9.0 9.4 10.0 3

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
6.2 30 7.1 5 10 7.7 9.3 12 3.5 0.7 1.3 3.1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1985-09-03
1990-08-16
1990-09-20
Depth (m) TEMP DO TEMP DO TEMP DO
0 19.5 8.8 23.8 8.8 17.8 9.1
1 23.8 8.8 17.8 9.0
2 19.1 8.8 23.7 8.8 17.8 8.9
3 23.7 8.7 17.8 8.9
4 19.0 8.8 23.7 8.7 17.8 8.9
5 23.7 8.8 17.8 8.8
6 19.0 8.9 23.1 8.7 17.8 8.8
7 18.9 12.4 17.8 8.9
8 18.9 9.0 15.8 13.2 17.8 8.9
9 18.2 9.9 12.9 13.8 16.7 10.6
10 13.5 12.3 10.5 13.8 12.2 12.2
11 11.4 12.3 9.4 13.6 10.8 12.3
12 10.1 12.2 8.3 13.5 9.2 12.2
13 9.1 12.1 7.9 13.2 8.2 12.1
14 8.5 11.9 7.3 12.6 7.8 11.8
15 8.0 11.7 6.9 12.0 6.9 10.7
16 7.5 11.0 6.6 11.6 6.5 10.2
17 7.0 10.1 6.3 10.7 6.1 7.7
18 6.9 9.6 6.1 9.0 5.9 4.9
19 6.5 8.3 6.0 7.5 5.7 3.1
20 5.8 4.5 5.6 1.0
21 6.1 5.1 5.7 3.2 5.5 0.8
22 5.7 1.5 5.4 0.7
23 5.6 0.4 5.3 0.6

Recent temperature and dissolved oxygen profile plots

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