Links to Data on this Page

 

Introduction

Vernal Pools

Technical Documents

Physical Chemistry Data 2017

Plant Identification 2017

Physical Chemistry Data 2016

Plant Identification 2016 

Physical Chemistry Data 2014

Plant Identification 2014

Physical Chemistry Data 2013 

Plant Identification 2013

Physical Chemistry Data 2012

Plant Identification 2012

Physical Chemistry Data 2011

Plant Identification 2011

Physical Chemistry Data 2010

Plant Identification 2010

Video Clips

Links to Other Pages

  

TECHICAL DATA FOR 2015 IS NOT AVAILABLE BECAUSE THE POND MONITOR HAD MEDICAL PROBLEMS. DATA COLLECTION SHOULD RESUME IN 2016.

 

Introduction

 

This page contains technical data or information or links to technical data or information. Users unfamiliar with Universal Transverse Mercator (UTM) maps and physical chemistry should read the Portable Document Format (PDF) files titled "The Maps" and "The Physical Characteristics of French Hill Pond" before exploring the technical data further. Links to these files are found below. The map pictured, "French Hill Pond Water Sources and Output," is an example of a UTM map.

 

French Hill Pond Water Sources  

The use of the data on this page and subsequent pages is at the user's own risk. Data sets can be interpreted in numerous ways depending upon the user's perspective and assumptions concerning the data set. Skilled scientists often disagree on the meaning of data. It is important to be thoroughly familiar with the how, when, why and where of data collection if conclusions are to be drawn. Ensure you understand the perspective of those who gathered the data and reconcile these perspectives with your own. Science is logic not politics.

 

"Science moves, but slowly slowly, creeping on from point to point."

Alfred Lord Tennyson, Locksley Hall, 1842

 

Beware of anecdotal evidence that seems to contradict established principles. There are frequently exceptions to rules. Science is not black and white. For example male and females of different species generally do not breed. But, there are exceptions to this rule. For example, a male donkey (Equius asinus) can be mated with a female horse (Equius caballus) to produce a mule, which is sexually sterile. Such an offspring is called a hybrid. Without exceptions, there could be no change and no progress toward new and robust life. It is best to assume the rule but accept that exceptions are possible and even likely.

 

Vernal Pools

 

Vernal (Latin for "spring") pools are small bodies of water in which certain species reproduce during spring. These pools normally dry by autumn. However, they are the only habitat in which certain species of  animals reproduce. These pools of water dry during summer. Therefore, fish cannot live in these pools. Newts, small frogs, snails and other animals can deposit their eggs in these pools without the threat of fish eating the eggs. The life in these pools either complete their life cycle or become capable of living on land before the pools dry . Vernal pools are protected by Maine state law and local Bar Harbor regulations. There are several vernal pools around French Hill Pond one of which is shown in the photograph below.

 

Vernal Pool

 

The following photograph shows the life in a vernal pool east of French Hill Pond on May 11, 2016. The pollywogs shown could be very young newts or frogs. Both animals have pollywog stages. These creatures are very small , much smaller than pollywogs in French Hill Pond proper. The decaying leaves in the background are maple and oak leaves. If these creatures were in French Hill Pond, they would be easy meals for the fish.

 

Vernal Pool Pollywogs 

 

Click here to go to the top of this page

 

Technical Documents on this Website

The following hyperlinks will download the topics indicated in a separate window and in PDF format. A PDF reader is required to read these documents. Most computer operating systems have a PDF reader as an accessory program. If your computer is not equipped with a PDF reader, you may download a reader from www.Adobe.com. The size of the files associated with the hyperlinks are listed in the link titles. The larger files may take some time to download if you are using a dial-up connections. There may also be a delay in downloading if the Internet is busy.

The Maps (226 kilobytes)

The Physical Characteristics of French Hill Pond (902 kilobytes)

Plants and Algae in French Hill Pond (1.15 megabytes)

Click here to go to the top of this page

Physical Chemistry Data for 2017

The following table is a record of the most recent physical chemistry data recorded for French Hill Pond in 2017. All readings were taken at the deepest point in the pond. N/O means "not observed." Orthophosphate  is often called "reactive phosphorus" and is the form of phosphorous used by plants. It is an inorganic phosphate. The other inorganic phosphates are the "polyphosphates" that are unstable and will degenerate into orthophosphate. Total phosphorous is a measure of all forms of phosphate including organic phosphate. The orthophosphate measurements were determined using a Hanna Instruments HI713 colorimeter and/or chemical reaction. Increases in phosphates encourage algae growth. Phosphorous content is measured in parts per billion (ppb). The pH, a measure of acidity/alkalinity of the water, is determined electrically and/or chemically. The Nitrate and ammonia content was determined by chemical reactions. The pond water should be free of nitrates and ammonia. The presence of nitrates and ammonia indicates an imbalance of plants and animals in the pond affecting the quality of the water.

The data in the following two tables are subject to revision or certification.

Date Time Wind
Speed (mph)
Wind
Direction
Sky Secchi Disk
Reading (meters)
pH Total
Phosphorous
Surface Water
Temp.(
oF)
Ortho-
phosphate
-PO4
 (ppb)
Nitrite
-NO2
(ppb)
Ammonia
NH3/-NH4
(ppb)
05/16 14:05 2.0 NE  Bright 1.50 6.00 N/O 61.9 0.0 0.0 0.0
06/01 13:43 5.0 S Bright 1.21 6.30 N/O 69.26 N/O N/O N/O
06/15 12:34 6.0 S Cloudy 1.18 6.7 N/O 73.22 0.0 0.0 0.0

 

The following table shows the measurement of dissolved oxygen in French Hill Pond on various dates in 2017.

The data was taken at one foot intervals with a Hanna Instruments HI 9147 Dissolved Oxygen Meter with a maximum probe depth of ten meters (33 feet) and is recorded as ppm (parts per million) oxygen/temperature degrees centigrade. Parts per million is the same as milligrams/liter. The meter is calibrated before each use. The dissolved oxygen at the surface is assumed to be at about 100% saturation. The first measurement, not in the table, is taken at the surface. This measurement must generally be within 3ppm of the expected dissolved oxygen at 100% saturation for the subsequent measurements to be acceptable.  However, French Hill Pond is shallow and very turbid apparently reducing the dissolved oxygen at the surface slightly. The meter is checked after use in water known to be at 99% saturation. The monitor believes the measurements to be accurate.

Date 1 foot 2 feet 3 feet 4 feet 5 feet 6 feet 7 feet 8 feet 9 feet Quality Control Reading
feet/dissolved oxygen/temperature
05/16* 9.5/15.6 9.6/14.9 9.8/13.2 10.1/10.6 10.0/10.0 9.2/10.2 10.2/8.9 10.3/8.5 10.3/8.4 4/10.3/10.4
06/01* 8.7/20.4 8.6/20.0 8.7/19.4 8.6/14.7 8.4/13.5 8.0/11.8 7.3/11.1 6.6/10.4 5.0/9.7 2/8.5/19.4
06/15 7.3/22.6 7.3/22.2 7.7/21.1 7.8/17.7 7.5/15.6 6.8/13.3 5.7/11.7 4.3/10.7 2.8/10.0 3/7.9/20.6

* This data was collected before the meter was certified. These measurements were taken after several days of rain. The pond was very turbulent and had a lower turbidity than usual. The meter was certified on June 14, 2017.

 

Plant Identification 2017

Emergent, floating-leaved and submersed plants that were positively identified in French Hill Pond during 2017 are listed in the table below with the date on which they were first positively identified.

When the common name of the plant is in blue, you may click on that name to display detailed information and photographs of that plant in a new window.

 

Plant Date
Identified
Spatterdock (Nuphar lutea spp.variegata) 06/01
Sphagnum Moss (spp.) 06/01
Sensitive Fern (Onoclea sensibilis) 06/01
Three-way Sedge (Dulichium arundinaceum) 06/01
Common Cattail (Typha latifolia) 06/01
Round-leaved Sundew (Drosera rotundifolia) 06/01
Small Cranberry (Vaccinium oxycoccos) 06/01
Large-Leaf Pondweed (Potamogeton amplifolius) 06/15
Blue Flag (Iris versicolor) 06/15
* A field plant found on the shore among emergent plants  

 

Click here to go to the top of this page

 

Click here to go to the top of this page

Physical Chemistry Data for 2016

The following table is a record of the most recent physical chemistry data recorded for French Hill Pond in 2016. All readings were taken at the deepest point in the pond. N/O means "not observed." Orthophosphate  is often called "reactive phosphorus" and is the form of phosphorous used by plants. It is an inorganic phosphate. The other inorganic phosphates are the "polyphosphates" that are unstable and will degenerate into orthophosphate. Total phosphorous is a measure of all forms of phosphate including organic phosphate. The orthophosphate measurements were determined using a Hanna Instruments HI713 colorimeter and/or chemical reaction. Increases in phosphates encourage algae growth. Phosphorous content is measured in parts per billion (ppb). The pH, a measure of acidity/alkalinity of the water, is determined electrically and chemically. The Nitrate and ammonia content was determined by chemical reactions. The pond water should be free of nitrates and ammonia. The presence of nitrates and ammonia indicates an imbalance of plants and animals in the pond affecting the quality of the water.

The data in the following two tables are subject to revision or certification.

Date Time Wind
Speed (mph)
Wind
Direction
Sky Secchi Disk
Reading (meters)
pH Total
Phosphorous
Surface Water
Temp.(
oF)
Ortho-
phosphate
-PO4
 (ppb)
Nitrite
-NO2
(ppb)
Ammonia
NH3/-NH4
(ppb)
05/17 13:50 5.0 E Cloudy Bright 1.24 6.88 N/O 66.2 N/O N/O N/O
06/01 13:08 5.0 N Bright 1.25 6.42 N/O 78.3 N/O N?O N/O
06/15 12:58 7.0 N Bright 1.17 6.83 N/O 68..0 0 0 0
06/30 11:39 2.0 N Bright 1.25 7.0 N/O 76.5 0 0 0
07/16 12:50 2.0 NE Cloudy Bright 1.09 7.0 N/O 84.7 0 0 0
07/30 12:57 0.0 SW Bright 1.08 7.03 N/O 86.0 0 0 0
08/15 13:00 5.0 N Bright 1.18 7.04 N/O 78.8 0 0 0
08/30 12;28 4.0 NE Bright 0.95 7.08 N/O 77.5 0 0 0
08/31 12:37 3.0 SW Cloudy/Bright 0.96 N/O N/O N/O N/O N/O N/O
09/15 13:25 6.0 NE Bright 1.06 7.04 N/O 69.8 0 0 0
09/29 14:05 2.0 N Bright 1.10 6.5 N/O 63.1 0 0 0
10/15 13:42 2.0 N Bright 1.01 6.9 N/O 56.8 0 0 0
10/31 13:41 5.0 E Cloudy 1.00 7.0 N/O 47.7 N/O N/O N/O

 

The following table shows the measurement of dissolved oxygen in French Hill Pond on various dates in 2016.

The data was taken at one foot intervals with a Hanna Instruments HI 9147 Dissolved Oxygen Meter with a maximum probe depth of ten meters (33 feet) and is recorded as ppm (parts per million) oxygen/temperature degrees centigrade. Parts per million is the same as milligrams/liter. The meter is calibrated before each use. The dissolved oxygen at the surface is assumed to be at about 100% saturation. The first measurement, not in the table, is taken at the surface. This measurement must generally be within 3ppm of the expected dissolved oxygen at 100% saturation for the subsequent measurements to be acceptable.  However, French Hill Pond is shallow and very turbid apparently reducing the dissolved oxygen at the surface slightly. The meter is checked after use in water known to be at 99% saturation. The monitor believes the measurements to be accurate.

Date 1 foot 2 feet 3 feet 4 feet 5 feet 6 feet 7 feet 8 feet 9 feet
05/17* 8.8/16.5 8.9/15.1 8.9/14.5 8.8/13.7 8.8/13.1 8.8/12.4 7.9/10.8 5.9/9.6 4.6/9.2
06/01* 7.8/23.3 7.8/22.8 7.4/20.7 6.6/17.7 6.4/16.0 5.7/13.5 5.1/12.0 3.3/11.1 2.0/10.2
06/15 8.2/18.2 8.3/17.8 8.2/16.5 8.0/15.9 7.6/15.7 6.8/15.2 2.3/13.0 1.3/11.6 0.8/10.7
06/30 7.7/23.7 7.6/22.9 7.4/22.5 5.8/21.3 3.3/18.9 0.6/15.9 0.2/13.9 0.0/12.3 0.0/11.6
07/16 7.6/28.3 7.6/26.6 7.6/24.7 5.6/21.4 3.1/19.7 0.1/17.1 0.0/15.0 0.0/13.6 0.0/12.6
07/30 7.4/29.2 7.3/27.6 7.1/27.0 6.0/24.7 0.4/21.7 0.0/19.3 0.0/17.0 0.0/15.1 0.0/13.5
08/15 7.9/26.1 7.8/25.0 7.5/23.8 6.6/22.8 0.6/21.1 0.4/18.4 0.3/16.9 0.2/15.7 0.1/13.7
08/31 8.1/23.8 8.2/23.4 7.7/22.6 5.5/21.8 2.7/21.3 0.5/20.0 0.3/18.2 0.2/16.0 0.2/14.6
09/15 7.6/20.6 7.5/20.0 7.3/19.7 7.1/19.2 6.9/19.1 6.7/18.8 3.4/18.0 1.3/15.9 0.9/15.0
09/29 8.1/17.0 8.0/16.1 7.7/15.6 7.3/15.2 7.0/15.0 6.8/14.9 6.3/14.8 5.4/14.7 3.2/14.5
10/15 9.0/12.5 8.8/12.3 8.8/12.1 8.7/11.9 8.9/11.8 8.9/11.7 8.9/11.5 9.0/11.4 8.9/11.3
10/31 10.6/8.7 10.4/8.7 10.3/8.6 9.9/8.6 9.6/8.5 9.6/8.5 9.6/8.5 9.6/8.5 9.5/8.4

* This data was collected before the meter was certified. The meter was certified to collect data for environmental protection agencies' databases on 06/03/2016.

 

Plant Identification 2016

Emergent, floating-leaved and submersed plants that were positively identified in French Hill Pond during 2016 are listed in the table below with the date on which they were first positively identified.

When the common name of the plant is in blue, you may click on that name to display detailed information and photographs of that plant in a new window.

 

Plant Date
Identified
Spatterdock (Nuphar lutea spp.variegata) 06/01
Sphagnum Moss (spp.) 06/01
Sensitive Fern (Onoclea sensibilis) 06/01
Three-way Sedge (Dulichium arundinaceum) 06/01
Large-Leaf Pondweed (Potamogeton amplifolius) 06/15
Blue Flag (Iris versicolor) 06/15
Erect Bur Reed (Sparganium americanum) 06/15
Bottlebrush Sedge (Carex hystericina) 06/15
Soft Rush (Juncus effusus) 06/15
Round-leaved Sundew (Drosera rotundifolia) 06/15
Small Cranberry (Vaccinium oxycoccos) 07/16
Variable Pondweed (Potamogeton gramineus) 07/30
Slender Pondweeds (Potamogeton sp.) 08/15
Fraser's Marsh St. Johnswort (Triadenum fraseri) 08/15
False Baby's Breath  (Galium mollugo) 08/15
Floating Bur-reed (Spaganium fluctuans) 08/15
Wool Grass (Scirpus cyperinus) 08/15
Stoneworts (Charales order) 08/15
Common Cattail (Typha latifolia) 08/15
Fern Pondweed (Potamogeton robbinsii) 08/30
* A field plant found on the shore among emergent plants  

 

Click here to go to the top of this page

TECHICAL DATA FOR 2015 IS NOT AVAILABLE BECAUSE THE POND MONITOR HAD MEDICAL PROBLEMS. DATA COLLECTION SHOULD RESUME IN 2016.

Physical Chemistry Data for 2014

The following table is a record of the most recent physical chemistry data recorded for French Hill Pond in 2014. All readings were taken at the deepest point in the pond. N/O means "not observed." Orthophosphate  is often called "reactive phosphorus" and is the form of phosphorous used by plants. It is an inorganic phosphate. The other inorganic phosphates are the "polyphosphates" that are unstable and will degenerate into orthophosphate. Total phosphorous is a measure of all forms of phosphate including organic phosphate. The orthophosphate measurements were determined using a Hanna Instruments HI713 colorimeter. Increases in phosphates encourage algae growth. Phosphorous content is measured in parts per billion (ppb). The pH, a measure of acidity/alkalinity of the water, is determined electrically and chemically.

The data in the following two tables are subject to revision or certification.

Date Time Wind
Speed (mph)
Wind
Direction
Sky Secchi Disk
Reading (meters)
pH Total
Phosphorous
Surface Water
Temp.(
oF)
Ortho-
phosphate (ppb)
 
05/22 12:26 4.0 SW Bright 1.26 6.48 N/O 71.6 N/O  
05/22 12:56 4.0 SW Bright 1.25 6.48 N/O 71.6 N/O *
05/31 13:40 3.0 S Bright 1.24 6.87 N/O 66.2 70  
06/16 12:45 8.0 N Bright 1.37 6.89 N/O 71.5 0.0  
06/30 13:48 7.0 S Bright 1.07 6.85 N/O 79.7 0.0  
06/30 14:12 7.0 S Bright 1.07 6.85 N/O 79.7 0.0 *
07/14 13:20 1.0 N Bright 1.00 6.00 N/O 86.0 0.0  
7/29 13:32 1.0 N Bright 0.95 6.82 N/O 81.5 0.0  
7/29 13:40 1.0 N Bright 0.95 6.82 N/O 81.5 0.0 *
8/14 13:59 7.0 SW Cloudy 0.93 7.06 N/O 66.2 70.0  
8/29 13:47 1.0 N Bright 0.88 7.03 N/O 74.3 60.0  
8/29 13:55 1.0 N Bright 0.88 7.03 N/O 74.3 60.0 *
9/14 14:04 8.0 NW Bright 0.95 7.00 N/O 66.2 N/O  
9/29 14:09 3.0 E Overcast 0.87 6.98 N/O 61.7 0.0  
9/29 14:12 3.0 E Overcast 0.88 6.98 N/O 61.7 0.0 *
10/14 13:45 12.1 S Overcast 0.80 6.95 N/O 58.1 N/O  
10/14 13:49 12.1 S Overcast 0.81 6.95 N/O 58.1 N/O *
10/29 13:35 7.0 SW Overcast 1.00 6.92 N/O 53.6 0.0  
10/29 13:40 7.0 SW Overcast 1.00 6.92 N/O 53.6 0.0 *

* Quality control reading.

Dissolved Oxygen 2014

The following table shows the measurement of dissolved oxygen in French Hill Pond on various dates in 2014.

The data was taken at one foot intervals with a Hanna Instruments HI 9147 Dissolved Oxygen Meter with a maximum probe depth of ten meters (33 feet) and is recorded as ppm (parts per million) oxygen/temperature degrees centigrade. Parts per million is the same as milligrams/liter. The meter is calibrated before each use. The dissolved oxygen at the surface is assumed to be at about 100% saturation. The first measurement, not in the table, is taken at the surface. This measurement must generally be within 3ppm of the expected dissolved oxygen at 100% saturation for the subsequent measurements to be acceptable.  However, French Hill Pond is shallow and very turbid apparently reducing the dissolved oxygen at the surface slightly. The meter is checked after use in water known to be at 99% saturation. The monitor believes the measurements to be accurate.

Date 1 foot 2 feet 3 feet 4 feet 5 feet 6 feet 7 feet 8 feet 9 feet
05/22* 8.6/18.9 8.8/17.1 8.7/15.6 8.3/14.5 7.9/13.5 6.7/12.4 6.0/11.8 4.8/10.3 1.7/8.8
05/31 8.1/19.2 8.1/17.5 7.8/16.4 7.6/15.0 6.6/13.6 5.7/12.9 3.0/11.1 2.1/10.6 1.0/9.9
06/16 7.7/20.7 7.5/19.4 7.4/18.8 6.6/17.9 5.3/16.4 3.2/14.1 1.4/12.4 0.0/10.3 0.0/9.9
06/30 7.2/27.2 7.3/26.8 6.0/22.7 5.6/18.7 4.2/17.0 1.4/15.2 0.0/13.8 0.0/12.3 0.0/11.2
07/14 6.8/28.3 6.6/26.8 5.5/22.3 3.7/20.4 3.7/17.3 1.4/15.4 0.0/14.1 0.0/13.0 0.0/11.7
07/29 7.2/26.9 6.8/22.8 5.2/21.6 1.5/20.3 0.0/17.6 0.0/15.6 0.0/14.4 0.0/13.2 0.0/11.9
08/14 6.8/20.4 6.6/20.4 6.6/20.3 6.5/20.3 3.2/19.0 0.4/17.2 0.1/15.0 0.0/14.7 0.0/12.3
08/29 6.2/23.2 5.9/23.3 5.2/21.5 2.2/22.6 0.3/18.2 0.1/16.4 0.0/15.0 0.0/13.8 0.0/13.0
09/14 6.8/19.4 6.5/18.3 6.2/18.0 6.1/17.9 5.6/14.4 5.3/17.2 0.6/15.6 0.3/14.3 0.2/13.5
09/29 8.4/18.1 7.2/17.3 5.8/16.1 6.8/15.2 6.9/14.7 6.4/14.5 6.1/14.2 4.5/14.0 1.2/13.6
10/14 9.1/13.8 8.9/13.8 8.8/13.7 8.8/13.6 9.1/13.5 9.2/13.4 8.5/12.5 7.9/11.8 7.7/11.7
10/29 8.4/11.1 8.4/11.0 8.4/10.9 8.5/10.9 8.6/10.9 8.6/10.8 8.8/10.8 8.9/10.7 8.8/10.7

* This data was collected before the meter was certified.

Plant Identification 2014

Emergent, floating-leaved and submersed plants that were positively identified in French Hill Pond during 2014 are listed in the table below with the date on which they were first positively identified.

When the common name of the plant is in blue, you may click on that name to display detailed information and photographs of that plant in a new window.

Plant Date
Identified
Spatterdock (Nuphar lutea spp.variegata) 05/22
Sphagnum Moss (spp.) 05/22
Sensitive Fern (Onoclea sensibilis) 05/22
Three-way Sedge (Dulichium arundinaceum) 05/31
Large-Leaf Pondweed (Potamogeton amplifolius) 06/16
Blue Flag (Iris versicolor) 06/16
Vernal Water-starwort (Callitriche palustris) 06/30
Variable Pondweed (Potamogeton gramineus) 06/30
Common Waterweed (Elodea canadensis) 06/30
Erect Bur Reed (Sparganium americanum) 06/30
Bottlebrush Sedge (Carex hystericina) 06/30
Slender Pondweeds (Potamogeton sp.) 06/30
Fraser's Marsh St. Johnswort (Triadenum fraseri) 07/14
Small Cranberry (Vaccinium oxycoccos) 07/14
Earth Loosestrife (Lysimachia terrestris) 07/14
Tufted Loosestrife (Lysimachia thrysiflora) 07/14
Algae Blooms 07/14
Filamentous Algae 07/14
Common Bladderwort (Utricularia macrorhiza) 07/29
Floating Bur-reed (Spaganium fluctuans) 07/29
Stoneworts (Charales order) 07/29
Three-petal Bedstraw (Galium trifidum) 07/29
Common Mallow  (Malva neglecta)* 07/29
False Baby's Breath  (Galium mollugo) 07/29
Common Cattail (Typha latifolia) 08/14
Narrow-leaved Cattail  (Typha augustifolia) 08/14
Soft Rush (Juncus effusus) 08/14
Wool Grass (Scirpus cyperinus) 08/14
Fern Pondweed (Potamogeton robbinsii) 09/29
Wild Celery (Vallisneria americana) 09/29
* A field plant found on the shore among emergent plants  

Click here to go to the top of this page

Physical Chemistry Data for 2013

The following table is a record of the most recent physical chemistry data recorded for French Hill Pond in 2013. All readings were taken at the deepest point in the pond. N/O means "not observed." Orthophosphate  is often called "reactive phosphorus" and is the form of phosphorous used by plants. It is an inorganic phosphate. The other inorganic phosphates are the "polyphosphates" that are unstable and will degenerate into orthophosphate. Total phosphorous is a measure of all forms of phosphate including organic phosphate. The orthophosphate measurements were determined using a Hanna Instruments HI713 colorimeter. Increases in phosphates encourage algae growth. Phosphorous content is measured in parts per billion (ppb).

The data in the following two tables are subject to revision or certification.

Date Time Wind
Speed (mph)
Wind
Direction
Sky Secchi Disk
Reading (meters)
pH Total
Phosphorous
Surface Water
Temp.(
oF)
Ortho-
phosphate (ppb)
 
05/15 12:24 9.0 SW Bright 1.28 N/O N/O 68.0 N/O  
05/31 12:32 12.0 SW Bright 1.60 6.3 N/O 72.4 20.0  
05/31 12:40 12.0 SW Bright 1.60 6.3 N/O 72.4 20.0 *
06/13 12:30 2.0 E Bright 1.35 5.9 N/O 68.0 90.0  
06/30 13:35 5.0 SE Overcast 1.15 6.7 N/O 69.8 <10.0  
07/19 12:29 3.0 SW Bright 1.02 6.7 N/O 79.7 120.0  
07/31 11:53 1.0 NE Bright 0.95 6.2 N/O 78.8 30.0  
07/31 11:56 1.0 NE Bright 0.97 6.2 N/O 78.8 30.0 *
08/16 12:26 4.0 S Bright 0.90 6.0 N/O 78.8 <10.0  
09/01 12:02 1.0 N Cloudy 0.95 6.7 N/O 77.3 170.0  
09/17 11:45 5.0 N Bright 0.85 6.2 N/O 58.0 110.0  
09/17 11:48 5.0 N Bright 0.87 6.2 N/O 58.0 110.0 *
10/02 11:33 3.0 SE Bright 0.93 6.9 N/O 66.2 <10.0  
10/19 13:22 5.5 S Bright 0.90 6.9 N/O 58.1 130.0  

* Quality control reading.

Dissolved Oxygen 2013

The following table shows the measurement of dissolved oxygen in French Hill Pond on various dates in 2013.

The data was taken at one foot intervals with a Hanna Instruments HI 9147 Dissolved Oxygen Meter with a maximum probe depth of ten meters (33 feet) and is recorded as ppm (parts per million) oxygen/temperature degrees centigrade. Parts per million is the same as milligrams/liter. The meter is calibrated before each use. The dissolved oxygen at the surface is assumed to be at about 100% saturation. The first measurement, not in the table, is taken at the surface. This measurement must generally be within 3ppm of the expected dissolved oxygen at 100% saturation for the subsequent measurements to be acceptable.  Highlighted readings are suspect pending further analysis. These readings are suspect because the surface readings were not at 100% saturation. However, subsequent checks of the dissolved oxygen meter in waters (aerated fish tanks) known to have levels of dissolved oxygen of at least 99% proved that the dissolved oxygen meter is operating properly. The discrepancies remain unexplained at this time. Resolution of discrepancies will be postponed pending the readings in 2014.

Date 1 foot 2 feet 3 feet 4 feet 5 feet 6 feet 7 feet 8 feet 9 feet
05/15* 8.7/17.5 8.8/17.3 8.4/17.2 8.4/17.1 8.5/14.4 8.3/13.8 7.0/11.4 6.4/10.5 5.1/9.9
05/31 8.4/22.3 8.4/21.5 9.0/13.1 9.2/12.0 9.1/11.4 8.9/11.0 8.5/10.5 7.2/10.4 N/O
06/13 9.0/16.0 8.9/14.7 9.2/13.9 9.0/13.3 8.7/12.8 7.7/11.9 6.1/11.1 4.2/10.4 3.7/10.1
06/30 8.0/20.1 7.7/20.0 7.7/19.9 6.7/16.4 5.7/14.8 5.0/13.4 3.8/11.8 2.2/11.0 2.2/11.1
07/19 6.3/27.3 6.2/27.0 6.2/26.7 1.2/19.2 0.8/16.8 0.0/14.5 0.0/13.2 0.0/11.9 0.0/11.1
07/31 6.1/23.3 5.0/21.4 4.1/20.7 3.5/19.7 1.2/18.1 0.1/16.0 0.0/15.0 0.0/13.9 0.0/12.7
08/16 6.6/22.8 6.2/21.0 5.0/19.9 2.4/18.6 0.0/17.1 0.0/15.8 0.0/13.8 0.0/13.1 0.0/12.0
09/01 7.0/24.2 5.3/22.7 3.7/20.4 0.2/18.7 0.0/17.6 0.0/16.5 0.0/14.4 0.0/13.3 0.0/12.7
09/17 5.8/15.7 5.5/15.4 5.3/14.8 5.2/14.7 4.1/14.5 3.1/14.4 3.6/13.9 0.0/13.4 0.0/12.8
10/02 8.0/19.1 7.9/18.3 6.7/15.8 6.3/15.2 6.0/14.7 5.1/14.2 4.0/13.8 0.8/13.3 0.2/12.7
10/19 7.8/15.1 7.8/15.0 7.7/13.8 7.6/13.7 6.6/12.7 5.4/12.3 5.3/12.2 5.1/12.0 4.0/11.9

* This dissolved oxygen reading was taken with an uncertified meter and will not be included in official reports. Subsequent readings were taken after the meter was certified. Fish cannot survive in waters with dissolved oxygen content of less than 5.0 parts per million (ppm). These preliminary readings indicate that fish will survive in French Hill Pond.

 

Plant Identification 2013

Emergent, floating-leaved and submersed plants that were positively identified in French Hill Pond during 2013 are listed in the table below with the date on which they were first positively identified.

When the common name of the plant is in blue, you may click on that name to display detailed information and photographs of that plant in a new window.

Plant Date
Identified
Spatterdock (Nuphar lutea spp.variegata) 05/15
Cattails (Typhaceae) 05/15
Large-Leaf Pondweed (Potamogeton amplifolius) 05/31
Common Bladderwort (Utricularia macrorhiza) 05/31
Blue Flag (Iris versicolor) 06/13
Bottlebrush Sedge (Carex hystericina) 06/13
Erect Bur Reed (Sparganium americanum) 06/13
Wool Grass (Scirpus cyperinus) 06/13
Slender Pondweeds (Potamogeton sp.) 06/13
Fraser's Marsh St. Johnswort (Triadenum fraseri) 06/13
Common Waterweed (Elodea canadensis) 06/13
Soft Rush (Juncus effusus) 06/13
Variable Pondweed (Potamogeton gramineus) 06/13
Sphagnum Moss (spp.) 06/13
Fern Pondweed (Potamogeton robbinsii) 06/13
Wild Celery (Vallisneria americana) 06/13
Three-way Sedge (Dulichium arundinaceum) 10/19
   
   
   
   
   

Click here to go to the top of this page

 

 

Physical Chemistry Data for 2012

The following table is a record of the most recent physical chemistry data recorded for French Hill Pond in 2012. All readings were taken at the deepest point in the pond. N/O means "not observed."

The data in the following two tables are subject to revision or certification.

Date Time Wind
Speed (mph)
Wind
Direction
Sky Secchi Disk
Reading (meters)
pH Total
Phosphorous
Surface Water
Temp.(
oF)
 
05/15 13:53 8.0 S Cloudy 1.55 N/O N/O 65.0  
06/01 12:59 6.0 N Bright 1.10 N/O N/O 72.0  
06/15 13:05 3.0 NW Bright 1.03 N/O N/O 76.5  
06/15 13:08 3.0 NW Bright 1.03 N/O N/O 76.5 *
06/29 13:14 8.0 S Bright 1.16 N/O N/O 76.0  
07/13 13:28 0.0 Calm Bright 0.90 N/O N/O 86.0  
07/27 13:41 0.0 Calm Overcast 0.94 N/O N/O 75.2  
08/10 11:57 6.0 SE Bright 1.05 N/O N/O 80.6  
08/10 11:59 6.0 SE Bright 1.05 N/O N/O 80.6 *
08/24 12:28 5.0 N Bright 1.00 N/O N/O 76.1  
09/07 13:13 0.0 Calm Overcast 1.03 N/O N/O 71.6  
09/21 13:35 0.0 Calm Overcast 0.92 N/O N/O 60.8 **
10/06 13:03 6.0 S Overcast 0.90 N/O N/O 60.8  
10/06 13:06 6.0 S Overcast 0.90 N/O N/O 60.8 *

*Quality Control Reading

** Work on the north shore was soiling the water

On June 1, 2012, a large beaver was spotted in the pond. No sign of this beaver on June 15, June 29, July 13, August 10 or August 24.

The drainpipe at the north end of the pond failed earlier this year. Sink holes were forming on the shore and threatening the integrity of the road. The drainpipe was plugged and the dam at the north end of the pond reinforced. As of September 7, 2012; the water flowing out of the pond always flows over the dam and along the original streambed of French Hill Brook not just during heavy rains.. The average depth of the pond has increased by about one foot and the pond is permanently slightly larger.

Click here to go to the top of this page

Plant Identification 2012

Emergent, floating-leaved and submersed plants that were positively identified in French Hill Pond during 2012 are listed in the table below with the date on which they were first positively identified.

When the common name of the plant is in blue, you may click on that name to display detailed information and photographs of that plant in a new window.

Plant Date
Identified
Spatterdock (Nuphar lutea spp.variegata) 06/01
Large-Leaf Pondweed (Potamogeton amplifolius) 06/15
Cattails (Typhaceae) 06/15
Erect Bur Reed (Sparganium americanum) 06/29
Common Bladderwort (Utricularia macrorhiza) 06/29
Wool Grass (Scirpus cyperinus) 06/29
Slender Pondweeds (Potamogeton sp.) 06/29
Fraser's Marsh St. Johnswort (Triadenum fraseri) 09/07
Aquatic Moss (spp.) 09/07
Metaphyton (algae) 09/07
Muskgrass (spp.) 09/07
Fern Pondweed (Potamogeton robbinsii) 09/07
Floating-leaf Pondweed (Potamogeton natans) 09/07
Ribbon-leaf Pondweed (Potamogeton epihydrus) 09/07
Northern Snail-seed Pondweed (Potamogeton spirillus) 09/07
Common Waterweed (Elodea canadensis) 09/07
Waterwort (Elaine minima) 09/07
Wild Celery (Vallisneria americana) 09/07
Soft Rush (Juncus effusus) 09/07
Variable Pondweed (Potamogeton gramineus) 09/07
Sphagnum Moss (spp.) 09/07

Click here to go to the top of this page

Physical Chemistry Data for 2011

The following table is a record of the most recent physical chemistry data recorded for French Hill Pond in 2011. All readings were taken at the deepest point in the pond. N/O means "not observed."

The data in the following two tables are subject to revision or certification.

Date Time Wind
Speed (mph)
Wind
Direction
Sky Secchi Disk
Reading (meters)
pH Total
Phosphorous
Surface Water
Temp.(
oF)
 
05/25 12:48 3.0 SE Bright 1.16 N/O N/O 63.7  
06/09 12:25 6.0 S Bright 1.15 N/O N/O 79.9  
06/22 12:18 5.0 SE Bright 1.05 N/O N/O N/O  
07/06 11:56 8.0 SE Bright 1.22 N/O N/O 83.3  
07/06 11:58 8.0 SE Bright 1.21 N/O N/O 83.3 *
07/20 11:21 7.0 S Bright 1.14 N/O N/O 80.1  
08/03 11:32 2.0 N Cloudy/Bright 1.06 N/O N/O 77.4  
08/17 12:40 5.0 S Bright 0.97 N/O N/O 81.9  
08/31 12:17 4.0 N Bright 0.97 N/O N/O 74.0  
9/14 12:30 7.0 S Cloudy/Bright 0.85 N/O N/O 76.0  
9/28 12:22 8.0 S Bright 1.03 N/O N/O 70.7  
9/28 12:25 8.0 S Bright 1.04 N/O N/O 70.7 *

*Quality Control Reading

Click here to go to the top of this page

Plant Identification 2011

Emergent, floating-leaved and submersed plants that were positively identified in French Hill Pond during 2011 are listed in the table below with the date on which they were first positively identified.

When the common name of the plant is in blue, you may click on that name to display detailed information and photographs of that plant in a new window.

Plant Date
Identified
Spatterdock (Nuphar lutea spp.variegata) 05/25
Cattails (Typhaceae) 05/25
Blue Flag (Iris versicolor) 06/09
Large-Leaf Pondweed (Potamogeton amplifolius) 06/22
Variable Pondweed (Potamogeton gramineus) 07/06 
Erect Bur Reed (Sparganium americanum) 07/06
Common Bladderwort (Utricularia macrorhiza) 07/20
Slender Pondweeds (Potamogeton sp.) 08/03
Soft Rush (Juncus effusus) 08/17
Wool Grass (Scirpus cyperinus) 08/17
Bottlebrush Sedge (Carex hystericina) 08/17
Flatstem Pondweed (Potamogeton zosteriformis) 08/17
Common Waterweed (Elodea canadensis) 10/18
Northern Snail-seed Pond Weed (Potamogeton spirillus) 10/18
Aquatic Moss (spp.) 10/18
Floating Bur-reed (Spaganium fluctuans) 10/18
Metaphyton (algae) 10/18
Muskgrass (spp.) 10/18
Fern Pondweed (Potamogeton robbinsii) 10/18
Floating-leaf Pondweed (Potamogeton natans) 10/18
Ribbon-leaf Pondweed (Potamogeton epihydrus) 10/18
Slender Waterweed (Elodea nutallii) 10/18
Wild Celery (Vallisneria americana) 10/18

The following photograph shows a suspicious plant that was found growing submerged near the shore of the island in French Hill Pond. Experts identified this plant part as a root segment of a shrub/tree growing on the island that extended into the water.

Suspicious Plant

Click here to go to the top of this page

Physical Chemistry Data for 2010

The following table is a record of the most recent physical chemistry data recorded for French Hill Pond in 2010. All readings were taken at the deepest point in the pond. N/O means "not observed."

The data in the following two tables are subject to revision or certification.

Date Time Wind
Speed (mph)
Wind
Direction
Sky Secchi Disk
Reading (meters)
pH Total
Phosphorous
Surface Water
Temp.(
oF)
 
05/25 13:15 10 SW Bright 1.15 6.45 N/O 82  
06/8 13:54 0 SW Cloudy/Bright 1.23 6.18 N/O 66  
06/8 14:00 0 SW Cloudy/Bright 1.22 6.18 N/O 66  
06/22 13:09 5 SW Bright 1.12 6.48 N/O 82  
07/06 12:38 3 SE Bright 1.17 6.80 N/O 82  
07/20 11:58 3 SE Bright 1.16 6.85 N/O 82  
08/03 12:05 5 SW Overcast 1.03 7.00 N/O 74  
08/17 12:58 5 SW Bright 1.00 7.00 N/O 84  
08/31 14:02 10 SW Bright 1.10 7.30 N/O 88  
09/15 11:58 7 SW Bright 1.00 6.90 N/O 66  
09/30 12:24 7 SW Overcast 1.00 6.92 N/O 68  
09/30 12:26 7 SW Overcast 1.00 6.92 N/O 68  

Click here to go to the top of this page

Plant Identification 2010

Emergent, floating-leaved and submersed plants that were positively identified in French Hill Pond during 2010 are listed in the table below with the date on which they were first positively identified.

When the common name of the plant is in blue, you may click on that name to display detailed information and photographs of that plant in a new window.

Plant Date
Identified
Spatterdock (Nuphar lutea spp.variegata) 05/25
Blue Flag (Iris versicolor) 05/28
Cattails (Typhaceae) 06/08
Erect Bur Reed (Sparganium americanum) 06/08
Large-Leaf Pondweed (Potamogeton amplifolius) 07/06
Little Floating Heart (Nymphoides cordata) 07/06
Slender Pondweeds (Potamogeton sp.) 07/06
Soft Rush (Juncus effusus) 07/06
Wool Grass (Scirpus cyperinus) 07/06
Floating-leaved Pondweed (Potamogeton natans) 07/06
Common Bladderwort (Utricularia macrorhiza) 07/20
Bottlebrush Sedge (Carex hystericina) 08/25
Vernal Water-starwort (Callitriche palustris) 09/15
Flatstem Pondweed (Potamogeton zosteriformis) 09/18

Click here to go to the top of this page

Video Clips

The following icons are links to video clips of possible interest. The length of the video is indicated in parenthesis.

French Hill Pond Panorama
French Hill Pond Panorama
(Silent, 20 seconds, 15.3 MB)
French Hill Brook
French Hill Brook
(11 seconds, 7.7 MB)
French Hill Brook
French Hill Brook Autumn
(13 seconds, 34 MB)
Autumn Gold and Blue
Autumn Gold and Blue
(11 seconds, 29.2 MB)
French Hill Brook
French Hill Brook Winter
(8 seconds, 6 MB)
Pond in Winter
French Hill Pond Winter
(14 seconds, 25.1 MB)
           


Click here to go to the top of this page

Links to Other Pages 

French Hill Pond Home Acadia Home Page Comparative Analyses