You're studying the water resources in a catchment and need to estimate the long...
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You're studying the water resources in a catchment and need to estimate the long term mean evaporation.
Use the following catchment mass balance equation and observations to estimate the mean evaporation.
\frac{dS}{dt} = P - Q - E
where S is the catchment water storage, P is the annual rainfall, Q is the annual streamflow and E is the catchment evaporation.
| Year | Annual precipitation
(mm/year)
| Annual streamflow (mm/year) |
|---|---|---|
| 1 | 544 | 174 |
| 2 | 521 | 100 |
| 3 | 641 | 108 |
| 4 | 682 | 188 |
| 5 | 669 | 112 |
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