IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
 

Membership Fees

IAHR membership is available on a two-tier fee structure with fees considerably lower for members from lower income countries. Countries are classified on the World Bank classification index, as shown below.
Country Income Ranking
Country or RegionIncome
AfghanistanLow
Aland IslandsLow
AlbaniaLow
AlgeriaLow
American SamoaLow
AndorraHigh
AngolaLow
AnguillaLow
AntarcticaLow
Antigua and BarbudaHigh
ArgentinaLow
ArmeniaLow
ArubaHigh
AustraliaHigh
AustriaHigh
AzerbaijanLow
BahamasHigh
BahrainHigh
BangladeshLow
BarbadosHigh
BelarusLow
BelgiumHigh
BelizeLow
BeninLow
BermudaHigh
BhutanLow
BoliviaLow
Bosnia and HerzegovinaLow
BotswanaLow
Bouvet IslandLow
BrazilLow
British Indian Ocean TerrLow
Brunei DarussalamHigh
BulgariaLow
Burkina FasoLow
BurundiLow
CambodiaLow
CameroonLow
CanadaHigh
Cape VerdeLow
Cayman IslandsHigh
Central African RepublicLow
ChadLow
ChileHigh
ChinaLow
Christmas IslandLow
Cocos (Keeling) IslandsLow
ColombiaLow
ComorosLow
CongoLow
Congo, The Dem Rep Of TheLow
Cook IslandsLow
Costa RicaLow
Cote D'ivoireLow
CroatiaHigh
CubaLow
CyprusHigh
Czech RepublicHigh
DenmarkHigh
DjiboutiLow
DominicaLow
Dominican RepublicLow
EcuadorLow
EgyptLow
El SalvadorLow
Equatorial GuineaLow
EritreaLow
EstoniaHigh
EthiopiaLow
Falkland Is (Malvinas)Low
Faroe IslandsHigh
FijiLow
FinlandHigh
FranceHigh
French GuianaLow
French PolynesiaHigh
French Southern TerrLow
GabonLow
GambiaLow
GeorgiaLow
GermanyHigh
GhanaLow
GibraltarHigh
GreeceHigh
GreenlandHigh
GrenadaLow
GuadeloupeLow
GuamLow
GuatemalaLow
GuineaLow
Guinea-BissauLow
GuyanaLow
HaitiLow
Heard Is and McDonald IsLow
Holy See (Vatican City)Low
HondurasLow
Hong Kong, ChinaHigh
HungaryHigh
IcelandHigh
IndiaLow
IndonesiaLow
Iran, Islamic Republic ofLow
IraqLow
IrelandHigh
IsraelHigh
ItalyHigh
JamaicaLow
JapanHigh
JordanLow
KazakhstanLow
KenyaLow
KiribatiLow
Korea, Dem People's RepLow
Korea, Republic ofHigh
KuwaitHigh
KyrgyzstanLow
Lao People's Dem RepublicLow
LatviaHigh
LebanonLow
LesothoLow
LiberiaLow
LibyaLow
LiechtensteinHigh
LithuaniaHigh
LuxembourgHigh
Macao, ChinaHigh
MacedoniaLow
MadagascarLow
MalawiLow
MalaysiaLow
MaldivesLow
MaliLow
MaltaHigh
Marshall IslandsLow
MartiniqueLow
MauritaniaLow
MauritiusLow
MayotteHigh
MexicoLow
Micronesia, Fed States OfLow
Moldova, Republic OfLow
MonacoHigh
MongoliaLow
MontenegroLow
MontserratLow
MoroccoLow
MozambiqueLow
MyanmarLow
NamibiaLow
NauruLow
NepalLow
NetherlandsHigh
Netherlands AntillesHigh
New CaledoniaHigh
New ZealandHigh
NicaraguaLow
NigerLow
NigeriaLow
NiueLow
Norfolk IslandLow
Northern Mariana IslandsHigh
NorwayHigh
OmanHigh
PakistanLow
PalauLow
Palestinian TerritoryLow
PanamaLow
Papua New GuineaLow
ParaguayLow
PeruLow
PhilippinesLow
PitcairnLow
PolandHigh
PortugalHigh
Puerto RicoHigh
QatarHigh
ReunionLow
RomaniaLow
Russian FederationLow
RwandaLow
Saint HelenaLow
Saint Kitts and NevisHigh
Saint LuciaLow
Saint Pierre and MiquelonLow
SamoaLow
San MarinoHigh
Sao Tome and PrincipeLow
Saudi ArabiaHigh
SenegalLow
SerbiaLow
Serbia and MontenegroLow
SeychellesHigh
Sierra LeoneLow
SingaporeHigh
SlovakiaHigh
SloveniaHigh
Solomon IslandsLow
SomaliaLow
South AfricaLow
South Georgia and the SSILow
SpainHigh
Sri LankaLow
St Vincent and GrenadinesLow
SudanLow
SurinameLow
Svalbard and Jan MayenLow
SwazilandLow
SwedenHigh
SwitzerlandHigh
Syrian Arab RepublicLow
TaiwanHigh
Taiwan, ChinaHigh
TajikistanLow
Tanzania, United RepublicLow
ThailandLow
Timor-LesteLow
TogoLow
TokelauLow
TongaLow
Trinidad and TobagoHigh
TunisiaLow
TurkeyLow
TurkmenistanLow
Turks and Caicos IslandsHigh
TuvaluLow
UgandaLow
UkraineLow
United Arab EmiratesHigh
United KingdomHigh
United States of AmericaHigh
UruguayHigh
US Minor Outlying IslandsLow
UzbekistanLow
VanuatuLow
VenezuelaLow
VietnamLow
Virgin Islands, BritishHigh
Virgin Islands, USHigh
Wallis and FutunaLow
Western SaharaLow
YemenLow
ZambiaLow
ZimbabweLow