River Abbreviations and Acronyms
- HUCHydrologic Unit Codes
- HUCSHydrologic Unit Codes
- HVAHelmand Valley Authority
- HVAHousatonic Valley Association
- HWHigh Wall
- HWCTRHeavy Water Components Test Reactor
- HWCTRHeavy Water Componentotest Reactor
- IBARItalian Board Airline Representatives
- IBWCInternational Bokndary Water Commission
- IBWTInter-Basin Water Transfer
- IBWTInter Basin Water Transfer
- ICBPInternational Council for Bird Protection
- ICEInventory of Conflict & Environment
- ICETIsland Coastal Economic Trust
- IDAInstantaneous Data Archive
- IDPIntelligent Device Platform
- IKInflatable Kayak
- IMSInvestment Management System
- IMSInvestment Management Solution
- IMWIntensively Monitored Watersheds
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