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3. TUTELA DELLE ACQUE (1)

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DISSABBIATURA<br />

DIMENSIONAMENTO:<br />

Granulometria<br />

Stokes -<br />

Ipotesi:<br />

Particelle sabbiose:<br />

Temperatura 20 °C<br />

-Log2 D D (mm) V sed (m/h)<br />

%<br />

passante<br />

2 0,25 2,01E+02 100<br />

3 0,125 5,04E+01 95<br />

4 6,25E-02 1,26E+01 87<br />

OBIETTIVO: rimozione delle particelle con D ><br />

0.03 mm cui corrisponde una velocità di<br />

sedimentazione pari a 3,15 m/h<br />

( -Log 2<br />

D > 5 → D > 0,03 mm)<br />

5 3,13E-02 3,15E+00 77<br />

6 1,56E-02 7,88E-01 62<br />

7 7,81E-03 1,97E-01 49<br />

8 3,91E-03 4,93E-02 39<br />

9 1,95E-03 1,23E-02 25<br />

10 9,77E-04 3,08E-03 14<br />

Rapporto lati<br />

b<br />

A<br />

11 4,88E-04 7,70E-04 5<br />

12 2,44E-04 1,92E-04 0<br />

Assumo una profondità h= 2.5 m<br />

L<br />

Tempo residenza idraulica:

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