Commit fd500e1c authored by Nicolas Forquet's avatar Nicolas Forquet
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add formula for the surface

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# TSS lysimeter # TSS lysimeter
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## Specifications ## Specifications
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* collect all incoming wastewater during a feeding day in a 2L bottle * collect all incoming wastewater during a feeding day in a 2L bottle
* removable top plate (through which the water infiltrates) * removable top plate (through which the water infiltrates)
* preferential flow prevention devices * preferential flow prevention devices
* adjustable top plate hole size * adjustable top plate hole size
* weighting device under the sampling bottle * weighting device under the sampling bottle
* autonomous datalogger * autonomous datalogger
* perforated bottom under the 2 L bottle * perforated bottom under the 2 L bottle
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## Calculation of the collection area ## Calculation of the collection area
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The hydraulic load is $H_{load} = 0.37 m \cdot m^{-2} \cdot j^{-1}$. The radius $r$ of the collection plate to collect a daily volume of $V$ de 2 L can be calculated as follow. The hydraulic load is $H_{load} = 0.37 m \cdot m^{-2} \cdot j^{-1}$. The radius $r$ of the collection plate to collect a daily volume of $V$ de 2 L can be calculated as follow.
$$ r = \sqrt{\frac{V}{\pi r}}
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``` ```
import math import math
H_load = 0.37 # m/m2/j H_load = 0.37 # m/m2/j
V = 2/1000 # m3 V = 2/1000 # m3
r = math.sqrt(V/H_load/math.pi) r = math.sqrt(V/H_load/math.pi)
print("The radius must be equal to {} cm.".format(math.floor(r*100))) print("The radius must be equal to {} cm.".format(math.floor(r*100)))
``` ```
%% Output %% Output
The radius must be equal to 4 cm. The radius must be equal to 4 cm.
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