CHINA LAKE

Data period: through 2017

Town	County	Delorme Map #	True Basin	Flushing Rate
CHINA	KENNEBEC	13	2	0.72 flushes/yr

Maximum Depth	Average Depth	Surface Area	Lake Volume	Drainage Area
26 m (85 ft)	8 m (25 ft)	908 ha (2,243 ac)	48,000,000 m3 (38,914 ac-ft)	50 km2 (20 mi2)

Secchi Disk Transparency Graphs

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

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
1970									4.7	4.7	4.7	1
1971									4.4	6.4	10.2	6
1972									4.9	6.5	9.4	6
1973									6.5	6.5	6.6	2
1977									5.3	6.2	7.0	3
1978									4.7	5.4	6.5	5
1979						9	5
1980					15				7.1	7.1	7.1	1		3.1	3.1	3.1
1982					15		14		5.0	5.0	5.0	1		3.1	3.1	3.1
1983					32		132	71	2.2	2.2	2.2	1		8.1	8.1	8.1
1984		16	63					25	2.0	3.6	5.5	4		4.7	7.5	12.7
1985								19	2.4	3.9	5.4	5		4.6	7.6	12.3
1986		14						25	1.5	3.6	6.5	6		2.3	11.6	32.3
1987		20	69						1.0	2.3	4.9	6		3.2	12.5	29.4
1988		26						32	1.3	3.8	10.3	9		3.6	13.4	24.2
1989			69		18		24	24	2.0	2.8	4.5	7		6.1	9.6	17.7
1990								21	2.0	3.1	5.8	7		2.1	8.8	20.6
1991					24			23	1.0	2.8	4.3	6		6.3	11.7	17.0
1992		18			17			28	1.8	3.4	4.7	6		3.2	8.5	11.3
1993					14		11	27	2.0	3.7	5.4	7		3.8	9.3	18.5
1994		19			19		22	24	1.7	3.2	5.9	5		3.5	15.2	32.5
1995		17			21		27	27	1.6	3.4	5.7	5
1996					19		18	33	2.0	3.9	6.9	6		3.5	11.5	16.7
1997					19		99	28	1.8	3.0	5.2	6		6.9	13.4	29.4
1998		14	85	7.4	16		35	28	1.2	4.1	6.9	7		3.0	13.4	40.2
1999			87	7.0	23		39	38	1.1	1.9	3.6	6		5.2	24.6	46.9
2000		16	80	7.2	19		46		1.5	3.2	5.5	8		3.6	13.6	31.4
2001		18	88	6.9	20		64		1.6	3.4	5.6	8		2.0	8.3	16.2
2002		16	89	7.3	19		26		1.4	3.5	6.1	7		3.1	12.5	29.6
2003		13	93	7.2	18		28		1.6	3.3	5.7	8		3.5	11.0	28.2
2004		20	67	6.8	20		42		1.8	3.0	4.7	7		5.0	11.3	19.0
2005		19	67	6.8	17		25		1.6	3.0	4.8	7		3.6	10.4	16.8
2006		19	59	6.9	18		33		1.4	3.6	5.4	8		6.0	14.4	28.0
2007			63	6.7	24		62		1.8	3.0	3.8	6		5.8	12.0	19.0
2008	7.5	20	82	7.5	18		58		2.0	3.1	5.3	7		11.0	13.9	19.0
2009			83	7.3	16		25		1.4	3.4	5.2	12		4.2	10.5	18.0
2010			87	7.5	18		42		1.5	3.7	6.9	11		3.7	10.8	23.0
2011			85	7.4	21		31		1.0	2.5	4.2	10		7.5	23.4	69.0
2012			93	7.4	24		23		1.3	2.8	4.0	6		5.6	14.9	21.0
2013	9.0	23	97	7.3	21		66		1.5	1.9	2.8	6		6.2	14.4	21.0
2014	8.0	23	80	8.0	20		88		1.7	1.7	1.7	1		22.0	22.0	22.0
2015									2.2	3.2	4.1	2
2016				6.4					2.5	3.5	4.1	7
2017									2.7	4.8	6.3	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
8.2	18	79	7	19	9	42	30	1	3.7	10	5.8	2	12	69

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L

	2013-08-28		2013-09-09		2013-09-19		2014-08-25		2016-08-24		2016-09-07		2016-09-22		2017-08-22
Depth (m)	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO	TEMP	DO
0	25	10.1	21	8.0	20	8.7	27	9.2	23	8.6	27	8.6	22	8.9	24	8.4
1	24	10.5	21	8.0	19	8.7	25	9.9	23	9.3	23	8.6	21	9.4	23	8.4
2	24	10.4	21	8.0	19	7.7	24	9.8	23	9.3	22	8.6	21	9.3	23	8.4
3	23	10.1	21	7.9	19	7.4	23	9.5	23	9.2	22	8.5	21	9.3	23	8.3
4	23	9.3	21	7.9	18	7.5	22	8.8	23	9.1	22	8.4	21	8.8	23	8.1
5	22	6.9	20	7.9	18	7.9	22	8.2	23	9.1	22	8.0	21	8.5	22	7.8
6	21	4.0	20	7.7	18	7.9	22	6.3	23	8.9	22	7.8	20	7.9	22	5.2
7	20	0.5	20	6.3	18	7.3	21	3.7	21	2.3	22	6.9	20	6.8	21	4.2
8			18	0.3	18	5.4	20	1.1	19	0.5	21	3.4	20	5.7	20	1.6
9	16	0.1	16	0.3	16	0.3	16	0.7	17	0.4	18	0.4	19	3.1	17	0.1
10			14	0.2	15	0.2	15	0.6	15	0.5	15	0.3	17	0.3	14	0.1
11	14	0.1	14	0.2			14	0.6	14	0.5	15	0.3	15	0.3	14	0.1
12			14	0.2	14	0.1	14	0.6	14	0.4	14	0.3	14	0.3	13	0.1
13	14	0.1	14	0.2			14	0.6	14	0.4	14	0.3	14	0.3	13	0.1
14			14	0.2	14	0.1	14	0.5	14	0.4	14	0.3	14	0.2	13	0.1
15	13	0.1	14	0.2					14	0.3	14	0.5	14	0.2	13	0.1
16					13	0.1

Recent temperature and dissolved oxygen profile plots

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