Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
DEDHAM HANCOCK 23 1 0.59 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
23 m
(77 ft) 		10 m
(34 ft) 		66 ha
(163 ac) 		6,805,725 m3
(5,517 ac-ft) 		7 km2
(2.6 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
1990 5.5 25 6.7 4.4 6.8 4.8 7.0 8.9 5 0.9 1.4 2.8
2007 6.2 6.7 7.2 4
2008

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
5.5 25 6.7 4.4 6.8 4.8 6.9 8.9 4.5 0.9 1.4 2.8

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1990-08-16
1990-09-20
Depth (m) TEMP DO TEMP DO
0 25.1 8.5 16.7 8.7
1 24.0 8.6 16.8 8.7
2 23.9 8.6 16.8 8.6
3 23.7 8.5 16.8 8.6
4 23.5 8.5 16.8 8.6
5 22.0 8.3 16.8 8.6
6 16.3 9.1 16.8 8.6
7 12.8 8.8 15.8 7.7
8 11.0 8.5 11.4 6.9
9 9.9 8.4 9.8 7.0
10 8.3 8.6 7.1 8.2
11 7.8 8.8 7.1 7.1
12 7.2 8.6 7.0 7.1
13 7.0 8.5 6.9 7.1
14 7.0 8.6 6.8 7.1
15 6.9 8.6
16 6.7 8.7 6.5 7.1
17 6.5 8.8
18 6.4 8.5 6.2 7.1
19 6.3 8.4
20 6.2 8.3 6.1 7.1
21 6.2 8.1 6.0 6.8
22 6.1 7.3
23 6.1 7.3
24 6.1 7.3
25 6.0 4.5

Recent temperature and dissolved oxygen profile plots

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