Environmental Earth Science Unit Test Formula's - Quarter 1 (Groundwater + Freshwater)

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13 Terms

1
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Formula for Specific Retention 

((water in pores - water drained) / total volume) 100

2
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Formula for Porosity

(water in pores / total volume) 100

3
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Formula for Permeability

(distance + direction drained / time drained

4
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Formula for Discharge

Q = Area*Velocity

5
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Formula for Area

A = Base*Width

6
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Formula for Velocity

V = Distance/Time

7
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Formula for Gradient

G = Height/Width

8
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Formula for ^Storage

current storage - previous storage

9
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Formula for Evapotranspiration Actual (if P}Ep)

= Ep

10
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Formula for Evapotranspiration Actual (if P{Ep)

P + ^St

11
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Formula for Deficit (when storage = 0)

Ep - Ea

12
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Formula for Surplus (when storage = 100)

Precipitation - Ep

13
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Formula for Storage

= (Ep-P) + prev. storage