Water reaching the ground from rainfall, snow and hail.
| Nr | Environmental Zone | Main locations and characteristics |
|---|---|---|
| 1 | Alpine North (ALN) | Scandinavian mountains |
| 2 | Alpine South (ALS) | The high mountains of central and southern Europe |
| 3 | Atlantic North (ATN) | NW Europe; under influence of the Atlantic ocean and the North sea |
| 4 | Atlantic Central (ATC) | Western Europe, moderate climate |
| 5 | Boreal (BOR) | The lowlands of Scandinavia |
| 6 | Continental (CON) | Central Europe; warm summers and cold winters |
| 7 | Lusitanean (LUS) | The southern Atlantic area; warm summers and mild winters |
| 8 | Mediterranean North (MDN) | Mediterranean north, with Cork Oak, fruit plantations and Olive groves |
| 9 | Mediterranean Mountains (MDM) | Mediterranean mountains, influenced by Mediterranean and mountains |
| 10 | Mediterranean South (MDS) | Typical Mediterranean climate; mild winter and hot, dry summers |
| 11 | Nemoral (NEM) | Southern Scandinavia, Baltic states and Belarus |
| 12 | Pannonian (PAN) | Part of Europe with steppes; cold winters and dry hot summers. |
| 13 | Anatolian (ANA) | The steppes of Turkey, a Mediterranean environment with steppes |