Precipitation and evaporation

Precipitation

When talking about the weather, it is often in connection with the amount of rainfall that has fallen or that is expected. The amount or change of precipitation is therefore reported daily by the news. The amount of rainfall varies greatly every year. As is the rainfall in a year and the amount of rainfall also varies in the country. Average rainfall varies from year to year and from season to season. You can easily track the daily amount of rainfall with a rain gauge. It is different from evaporation. After all, it is about what remains or is short on balance. Soil, ditches, drain, and trenches ensure the drainage of excess water. The supply is often more difficult. 

Table 1: Precipitation, potential evaporation, and precipitation surplus, over a period of 65 years.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Precipitation 6 4 4 51 6 7 8 7 7 7 7 7 7
  4 9 7 54 5 6 8 1 2 7 3 4 8
{Potential evaporation   1 2? 60 9 9 7 4 1 5 2   5
  2 0 9? 86 8 3 6 8 9       2
Precipitation surplus 6 3 1? -9 -3 -1 1 2 5 6 7   2
  2 9 8? -32 3? 7 2 3 3 8 2   5

 

THIS TABLE IS NOT COMPLETE!!!!!!!!!!!!!1

Precipitation shortage

If the evaporation is greater than the precipitation, we speak of a precipitation shortage. A supply via drainage would occasionally be possible for the moisture supply. We then speak of infiltration. When we talk about drainage, we focus on the removal of excess water. 

 

Precipitation surplus

With a precipitation surplus, more water falls than evaporates. A precipitation surplus usually occurs in the period from August to April. Figure 2 shows the evaporation over the months of the year. The figure shows that most of the time there is a precipitation surplus. It is this period of surplus sedimentation that makes it necessary to ensure proper drainage.

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