PCLacke | Witteveen+Bos

PCLake Metamodel

This is the PCLake metamodel. Use the sliders and input fields on the right side. Based on the expected water quality, the image on the left changes. Using the input you enter in the configurator below, PCLake's metamodel estimates the expected water quality.

Sediment type
Water depth (m)

0.5 4
The average water depth
String length (m)

300 4000
Cross section of the lake in the prevailing wind direction. As an initial estimate, the root of the water surface can be used
Flow rate (mm per day)

4 200
The sum of all incoming water flows. Consider precipitation and inlet
Extinction (-)

0.25 2
Background absorbance of the water. This is the coloration of the water, so not how turbid the water is due to algae or suspended matter, for example. By default, this value is 0.5. For peat pools with light brown coloration, for example, you can enter the value of 1
Relative surface area of swamp (m²/m²) optional

0 2
Area of swamp relative to lake surface area. This includes water reeds that function as a helophyte filter

Outcome critical P load (mg/m²/day)

123

Current load (mg/m²/day)
The current phosphate load in mg/m²/day

View result

Result modelrun

The phosphate load is higher than the critical limits, a turbid algae-rich situation is expected. The phosphate load is between the critical limits, the expected condition can be turbid and rich in algae as well as clear and rich in vegetation, depending on the condition in which you start. The phosphate load is lower than the critical limits, a clear plant-rich situation is expected.

Clear to turbid
	mg P/m²/d
0.33	g P/m²/year
Turbid to clear
	mg P/m²/d
0.11	g P/m²/year
Residence time
days

Explanation results

The results give a first impression of the water quality at the values entered by you. It gives an indication of the water quality in your lake or pond. The kP stands for critical phosphate load. Of course, this raises more questions. Please do not hesitate to contact us. See the contact details of aquatic ecologist Bob Brederveld below.