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Manual do pequeno açude - IRD

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BS-2lEstu<strong>do</strong>s Basicos 219<br />

165<br />

cota<br />

(m)<br />

(1)<br />

Ho<br />

HI<br />

H2<br />

H3<br />

. ..etc...<br />

- na coluna (6), calcula-se a soma <strong>do</strong>s volumes parciais, conseguin<strong>do</strong>-se, assim, o<br />

volume total Vi correspondente a cada profundidade Hi.<br />

super desnhel<br />

fkie 04<br />

m2<br />

&’ (3)<br />

0<br />

Sl<br />

s2<br />

s3<br />

&HI<br />

&Hz<br />

HI<br />

semi-soma<br />

das<br />

superficies<br />

Pl+s2w<br />

(s2+s3)/<br />

(4)<br />

PI)<br />

volume volume<br />

partial total<br />

(5) (6)<br />

V1=Hl-S1/270 VI<br />

VI=(SI+S~)(H~HI)/~<br />

(3) Demfvel: difmça de cota entre as duas curvas de nivel sucesivas.<br />

V2=(&+&) (HdWl2 v1+v2<br />

Exemple:<br />

o levantamento completo <strong>do</strong> <strong>açude</strong> estuda<strong>do</strong> no paragrafo anterior (3.80 m de<br />

profundidade mhima) deu, ap& planimetragem de cada curva de nlvel da planta<br />

correspondente, a tabela seguinte:<br />

COTA<br />

(ml<br />

PROFUNDIDADE<br />

64<br />

SUPERFkIE<br />

(m2)<br />

96.20 0 0<br />

97 0.80 aIO0<br />

98 1.80 12IOO<br />

99 280 25.640<br />

100 (sangria) 3.80 43.100<br />

101 4.80 64ooo<br />

Deduz-se a tabela PSV completa correspondente, com Calculo <strong>do</strong>s volumes:<br />

cota<br />

Cm)<br />

0 0<br />

0.80 3ooo<br />

1.80 12100<br />

.280 25640<br />

3.80 43100<br />

4.80 tmoo<br />

supeI desnfvel<br />

tïcie<br />

(m2) W<br />

semi-soma<br />

das<br />

superficies<br />

.80 888<br />

1.00<br />

1.00<br />

1.00<br />

1.00<br />

7550<br />

18870<br />

34370<br />

53550<br />

Vl<br />

volume volume<br />

partial total<br />

(4 Cd<br />

7550<br />

18870<br />

34370<br />

53550<br />

888<br />

8438<br />

27308<br />

61678<br />

115228

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