MORPHOMETRIC DATA

Flushing Rate (yr¹)

989,500

1977

1992 OLIGOTROPHIC

OLIGOTROPHIC

6.7

3.2

2,600

1.8Max. Depth (m):

Mean Depth (m):

Volume (m³):

Watershed Area (Ac.):

Shore Length (m):

ROCKWOOD POND, FITZWILLIAM, NH

TROPHIC CLASSIFICATION KNOWN EXOTIC SPECIES

Year Trophic class

Surface Area (Ac.): 76

Elevation (ft): 1111

P Retention Coef: 0.63

The Waterbody Report Card tables are generated from the DRAFT 2014 305(b) report on the status of N.H. waters, and are based on data collected from 2004-

2013. Detailed waterbody assessment and report card information can be found at www.des.nh.gov/organizations/divisions/water/wmb/swqa/index.htm

Volunteer Lake Assessment Program Individual Lake Reports

832

Designated Use Parameter Category Comments

Phosphorus (Total) GoodAquatic Life The calculated median is from 5 or more samples and is < indicator and > 1/2 indicator and the chlorophyll a

indicator is okay.

pH Bad >10%, with a minimum of 2, samples exceed criteria, with 1 or more by a large margin.

Oxygen, Dissolved Very Good There are a total of at least 10 samples with 0 exceedances of criteria.

Dissolved oxygen satura Cautionary There are < 10 samples with 1 exceedance of criteria. More data needed.

Chlorophyll-a Good The calculated median is from 5 or more samples and is < indicator and > 1/2 indicator.

Escherichia coli No DataPrimary Contact Recreation No data for this parameter.

Chlorophyll-a Very Good There are a total of at least 10 samples with 0 exceedances of indicator.

WATERSHED LAND USE SUMMARY

Fry, J., Xian, G., Jin, S., Dewitz, J., Homer, C., Yang, L., Barnes, C., Herold, N., and Wickham, J., 2011. Completion of the 2006 National Land Cover Database

for the Conterminous United States, PERS, Vol. 77(9):858-864. For larger image contact NHDES.

Land Cover Category % Cover Land Cover Category % Cover Land Cover Category % Cover

Open Water 10.4

Developed-Open Space 3.23

Developed-Low Intensity 0.12

Developed-Medium Intensity 0

Developed-High Intensity 0

Barren Land 0

Deciduous Forest 27.81

Evergreen Forest 18.89

Mixed Forest 36.18

Shrub-Scrub 0

Grassland/Herbaceous 0

Pasture Hay 0.97

Cultivated Crops 0

Woody Wetlands 2.41

Emergent Wetlands 0

This epo t as ge e ated the NH DE“ Volu tee Lake Assess e t P og a VLAP . Fo o e i fo aio o ta t VLAP at - o sa a.stei e @des. h.go

Observations Refer to Ta le 1 and Histori al Deep Spot Data Graphi s) Chlorophyll-a: Chlo oph ll le els e e e lo i Jul , de eased g eatl f o a d e e u h less tha the state edia . Histo i al t e d a al sis i di ates highl a ia le hlo oph ll le els si e o ito i g ega . Conductivity/Chloride: Deep spot, Bea h I let a d Outlet o du i it le els e e lo a d slightl less tha the state edia . Histo i al t e d a al sis i di ates sig ii a tl de easi g i p o i g epili ei uppe ate la e o du i it

si e o ito i g ega . Hol a I let o du i it as slightl g eate tha the othe po d staio s a d the state edia , ho e e ot a o e a le el of o e . E. coli: Bea h I let E. oli le els e e e lo a d u h less tha the state sta da ds fo pu li ea hes ts/ L a d su fa e ate s ts/ L . Total Nitrogen TKN+NO : Nit oge sa pli g as o du ted at the Epili io i Jul to assess hethe it oge o phospho us a e the li ii g ut ie t fo algal g o th i the po d. Based o the Jul sa pli g e e t the TN:TP aio

as . TN:TP aios > t pi all i di ate phospho us li itaio . Total Phosphorus: Epili ei , Metali ei iddle ate la e , H poli ei lo e ate la e , a d Outlet phospho us le els e e ithi a lo to a e age a ge. Epili ei phospho us le els i eased slightl f o ut e ai ed less tha the state edia . Histo i al t e d a al sis i di ates sta le epili ei phospho us si e o ito i g ega . Bea h a d Hol a I let phospho us le els e e ele ated. Hol a I let e pe ie es a la ge a ou t of distu a e

alo g the ipa ia ufe a d a e i pa i g phospho us le els he e. This ould o t i ute to the highe a u da e of a uai pla ts a d algae i this o e. Bea h I let e pe ie es highl olo ed ate i di ai g high o ga i i lue es hi h ould ause ele ated phospho us du i g lo lo o diio s. Transparency: T a spa e as good i Jul a d as highe ete tha the state edia . Histo i al t e d a al sis

i di ates elai el sta le t a spa e ith ode ate a ia ilit et ee ea s. Turbidity: Deep spot, Hol a I let a d Outlet tu idiies e e ithi a lo to a e age a ge fo su fa e ate s. Bea h I let tu idit as slightl ele ated likel due to the high olo a d o ga i o te t of the ate . pH: Epili ei pH as slightl less tha the desi a le a ge . - . u its ho e e it as the highest est pH easu ed si e o ito i g ega . Histo i al t e d a al sis i di ates highl a ia le epili ei pH si e o ito i g ega . Metali ei , H poli ei , Hol a I let, a d Outlet pH le els e e less tha desi a le a d slightl a idi . Bea h I let pH

as a idi a d ii al to a uai life.

Volunteer Lake Assessment Program Individual Lake reports

Rockwood Pond, Fitzwilliam

5 Data Summary

NH Media Values: Media alues fo spe ii pa a ete s ge e ated f o histo i lake o ito i g data. Alkali it : . g/L

Chloroph ll-a: . g/

Co du ivit : . u“/

Chloride: g/L

Total Phosphorus: ug/L

Tra spare : .

pH: .

NH Water Qualit Sta dards: Nu e i ite ia fo spe ii pa a ete s. Results e eedi g ite ia a e o side ed a

ate ualit iolaio . Chloride: > g/L h o i

E. oli: > ts/ L – pu li ea h

E. oli: > ts/ L – su fa e ate s

Tur idit : > NTU a o e atu al le el pH: et ee . - . u less atu all o u i g

Para eter Tre d E pla aio E pla aio Tre d Para eter

Chlo oph ll-a “ta le T e d ot sig ii a t; data highl a ia le. Data sig ii a tl de easi g. I p o i g Co du i it

T a spa e “ta le T e d ot sig ii a t; data ode atel a ia le. T e d ot sig ii a t; data highl a ia le. “ta le pH epili io

Phospho us epili io “ta le T e d ot sig ii a t; data sho lo a ia ilit .

Historical Water Quality Trend Analysis

Recommended Actions: I ease o ito i g f e ue to o e pe o th du i g the su e to ete assess seaso al a d histo i al ate ualit t e ds a d de eased the data a ia ilit . Hol a I let phospho us le els a e i lue ed hu a distu a es alo g the ipa ia ufe . Edu ate p ope t o e o the efe ts of de elop e t alo g a t i uta a d the i pa ts ele ated phospho us le els a ha e o the po d su h as i eased a uai pla t a d algal g o th. The aio of it oge to phospho us i the po d i di ates phospho us is the li ii g ut ie t afe i g pla t a d algal g o th. This highlights the i po ta e of i i izi g phospho us i puts to the po d. Regula l

ai tai a d pu p sepi s ste s; ai tai egetated ufe s to edu e e osio of ea h a d sho eli e a eas; a age sto ate u of f o sho ef o t p ope ies a d steep slopes. DE“’ N.H. Ho eo e ’s Guide to “to ate Ma age e t a d UNH Coope ai e E te sio s’ La ds api g at the Wate ’s Edge a e g eat esou es.

“taio Na e Ta le . A e age Wate Qualit Data fo ROCKWOOD POND

Alk. Chlo -a Co d. E. Coli TKN NO +NO Total P T a s. Tu . pH

g/l ug/l u“/ #/ l g/L g/L ug/l tu

NV“

Epili io . . . . ND . . .

Metali io . . .

H poli io . . .

Bea h I let . . .

Hol a I let . . .

Outlet . . .