Analysing, reviewing and recording weather patterns in Dayboro since 2004. Challenging the main stream climate change thought, by being objective and providing facts.

Rain and Evapotranspiration in Dayboro

Rain and Evapotranspiration in Dayboro​. We finally receive some of that well-needed rain, personally, I had enough rain now as at the time of writing my grass seeds start their migration to the neighbours…. something I am not too impressed with. The neighbours will have a nice green lush lawn at the end of this month for sure.

Although a big rain event was predicted by the BOM and a much lesser by me I have to admit more rain is coming from this system then I expected. Still way less then 100mm daily, which is good we do not need flooding and stuff.

It also prompted me to have a look at the rainfall versus Evapotranspiration. Yes, it is a real word.

Evapotranspiration

Evapotranspiration (ET), and the usual FB clowns will go stir crazy on this, is “Evapotranspiration (ET) is a term used to describe the sum of evaporation and plant transpiration from the Earth’s land surface to the atmosphere. Evaporation accounts for the movement of water to the air from sources such as the soil, canopy interception, and waterbodies. Transpiration accounts for the movement of water within a plant and the subsequent loss of water as vapour through stomata in its leaves.”

We all know what rainfall is… or precipitation as it is known among the community. 

The definition the BOM gives is 

Evapotranspiration is not the same as evaporation. Evapotranspiration is the term used to describe the part of the water cycle which removes liquid water from an area with vegetation and into the atmosphere by the processes of both transpiration and evaporation.

Evaporation occurs when liquid water is converted to water vapour and hence removed from a surface, such as a lake, soil or wet vegetation, into the air. Transpiration occurs when water in plant tissues is lost to the atmosphere, predominantly through the small opening in the leaves of plants and grasses called stomata.

By knowing the rate of water loss from a region farmers will be better placed to efficiently manage the available water for their crop.”

You can find the Evapotranspiration definition, what it is used for and how it is calculated on their website. 

 

Rain and Evapotranspiration in Dayboro​

Looking at the rainfall we had this year (to date) and the amount of ET we had the net value of moisture is quite low. Goes to show that we need a lot of rain to replenish all we use.