Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
DEDHAM HANCOCK 23 1 0.66 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
11 m
(35 ft) 		6 m
(21 ft) 		18 ha
(44 ac) 		1,171,204 m3
(950 ac-ft) 		1 km2
(0.5 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
1980 10 10.5 10.5 1
1990 9.2 36 7.2 6 15 6 7.4 8.3 5 0.6 1.9 3.4

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
9.2 36 7.2 6 15 6 8.9 10 3 0.6 1.9 3.4

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 24 8.8 18 8.9
1 24 8.8 18 8.9
2 24 8.8 18 8.8
3 24 8.8 18 8.8
4 24 8.8 18 8.8
5 24 8.8 18 8.8
6 20 12.8 18 8.8
7 17 13.2 18 8.7
8 14 13.4 17 9.4
9 12 11.3 14 6.9
10 11 4.7 12 1.0

Recent temperature and dissolved oxygen profile plots

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