NIERS
| 5 |
NOGAT
| 5 |
NORE
| 4 |
NUTHE
| 5 |
OBRA
| 4 |
ODER
| 4 |
OGLIO
| 5 |
OGNON
| 5 |
OHRA
| 4 |
OHRE
| 4 |
OISE
| 4 |
3 | |
OKER
| 4 |
3 | |
3 | |
OPPA
| 4 |
OPPO
| 4 |
ORBA
| 4 |
ORCO
| 4 |
ORLA
| 4 |
OSSA
| 4 |
OSTE
| 4 |
OUSE
| 4 |
OUST
| 4 |
PAAR
| 4 |
PARMA
| 5 |
PEENE
| 5 |
PENO
| 4 |
PFINZ
| 5 |
PIAVE
| 5 |
PISSA
| 5 |
PLANE
| 5 |
2 | |
RAAB
| 4 |
RANCE
| 5 |
REGA
| 4 |
REGEN
| 5 |
REKA
| 4 |
REMS
| 4 |
RENO
| 4 |
REUSS
| 5 |
RHEIN
| 5 |
RHIN
| 4 |
RHONE
| 5 |
RISS
| 4 |
ROTT
| 4 |
RUHR
| 4 |
3 | |
RUSS
| 4 |
RUWER
| 5 |
SAALE
| 5 |
SAAR
| 4 |
SACCO
| 5 |
SALTO
| 5 |
3 | |
SAONE
| 5 |
SARNO
| 5 |
3 | |
SAUER
| 5 |
SAVE
| 4 |
SEGRE
| 5 |
SELE
| 4 |
SESIA
| 5 |
SEVRE
| 5 |
SIEG
| 4 |
SIHL
| 4 |
SOMME
| 5 |
SPREE
| 5 |
STOER
| 5 |
STOUR
| 5 |
SUIR
| 4 |
SWINE
| 5 |
TAJO
| 4 |
TARN
| 4 |
TARO
| 4 |
TAUN
| 4 |
3 | |
3 | |
TEES
| 4 |
TEJO
| 4 |
3 | |
THAYA
| 5 |
TIBER
| 5 |
TOCE
| 4 |
TOSA
| 4 |
TOSE
| 4 |
TOWY
| 4 |
TRAUN
| 5 |
TRAVE
| 5 |
TRENT
| 5 |
TWEED
| 5 |
TYNE
| 4 |
UCHTE
| 5 |
UCKER
| 5 |
3 | |
3 | |
URFT
| 4 |
3 | |
VARA
| 4 |
VILS
| 4 |