Tuesday, March 9, 2010

March rainfall and runoff

There have now been two falls of rain in March. The first was 9.6 mm. This resulted in runoff of 457 megalitres, which was very low (half of the predicted runoff based on last year's runoff and rainfall figures.)

Then on 5,6,7 and 8 of March we had a combined rainfall of 38.2 (it was a fair bit more than that at our house, but I am going with the station that the BOM use.)

I am now tracking the runoff from this.

Currently, we have had 155.2 mm of rainfall since I started analysing this (way above average for the period) and less than 11,485 megalitres of runoff (way below average for that amount of rainfall, and below the megalitre per millimetre of runoff that we acheived last year, in what was a very low year.)

I expect that rainfall will be above average for the year, but runoff to be below average - well below average.

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