Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
DEDHAM HANCOCK 23 1 0.99 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
10 m
(32 ft) 		4 m
(12 ft) 		78 ha
(193 ac) 		2,945,170 m3
(2,388 ac-ft) 		4 km2
(1.7 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 38 6.7 5.8 7 6.8 7.1 7.8 4 1.4 1.8 2.5
1996 3.0 31 6.8 9.0 5.6 5.6 5.6 1
2016 6 6.0 44 6.9 15.0 8.3 8.3 8.3 1 1.9 1.9 1.9

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 4.8 38 6.8 9.9 7 5.6 7 8.3 2 1.4 1.8 2.5

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1990-08-14
1990-09-18
1996-09-27
1996-09-29
2016-08-31
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24 8.3 18 8.9 17 9.6 17 9.6 23 8.4
1 24 8.2 18 8.8 16 9.6 16 9.6 23 8.4
2 24 8.3 18 8.8 16 9.6 16 9.6 23 8.4
3 24 8.3 18 8.8 16 9.6 16 9.6 23 8.3
4 24 8.2 18 8.8 16 9.6 16 9.6 23 8.2
5 23 8.0 18 8.8 16 9.6 16 9.6 23 8.2
6 21 6.4 18 8.8 16 9.6 16 9.6 23 8.1
7 15 6.3 18 8.7 16 9.5 16 9.5 20 5.3
8 12 4.5 18 8.4 15 9.5 15 9.5 15 3.9
9 10 0.9 12 1.0 12 1.0 13 1.3

Recent temperature and dissolved oxygen profile plots

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