How the moisture coefficient is determined and give examples.

The moisture coefficient is defined as the ratio of the average annual precipitation (in mm) to the annual evaporation rate (in mm). For example, 1600 mm of precipitation falls per year, 800 mm evaporates, then the moisture coefficient will be equal to:
K = 1600/800 = 2.
If K> 1, then the moisture is excessive; if K ≈ 1, then the moisture is sufficient; if K is in the range from 0.3 to 1, then the moisture is insufficient;
if K <0.3, then the moisture is poor.
Excessive moisture corresponds to natural zones of tundra, forest-tundra, taiga, sufficient moisture – mixed or broad-leaved forests, insufficient – steppe (if K <0.6), forest-steppe (if K> 0.6), scarce – desert (if K <0, 1), semi-desert (if K> 0.1).