IWA 33-1-2019 PDF
Name in English:
St IWA 33-1-2019
Name in Russian:
Ст IWA 33-1-2019
Original standard IWA 33-1-2019 in PDF full version. Additional info + preview on request
Full title and description
Technical guidelines for the development of small hydropower plants — Part 1: Vocabulary. This International Workshop Agreement (IWA 33-1:2019) defines the professional technical terms and definitions commonly used for small hydropower (SHP) plants, covering terminology used across hydrology, civil and hydraulic works, hydraulic machinery and electrical systems for SHP projects.
Abstract
IWA 33-1:2019 provides an authoritative, harmonized set of terms and definitions to support planning, design, procurement and communication for small hydropower projects. The document aims to reduce ambiguity in technical documents, contracts and regulatory material by standardizing vocabulary used by engineers, manufacturers, policymakers and other stakeholders in the SHP sector.
General information
- Status: Withdrawn (being revised / superseded by a new vocabulary work item under ISO/TC 339).
- Publication date: 10 December 2019.
- Publisher: Published as an International Workshop Agreement via ISO (originator / owner: ISO / ISO/TC 339).
- ICS / categories: 27.140 (Hydraulic energy engineering).
- Edition / version: Edition 1 (2019).
- Number of pages: 60 pages.
Key bibliographic and lifecycle details above are taken from the ISO record for IWA 33-1:2019.
Scope
This part (Part 1: Vocabulary) defines professional technical terms and their definitions commonly used for small hydropower (SHP) plants. The scope covers terminology relevant to hydrology, siting and site assessment, civil and hydraulic structures, hydraulic machines and electromechanical equipment, electrical systems, and terms needed for environmental, social and economic aspects of SHP projects. The vocabulary is intended to support the wider IWA 33 series and be reflected in subsequent ISO work (ISO/AWI 25259).
Key topics and requirements
- Standardized terms for hydrology and resource assessment (e.g., flow, head, seasonal flow characteristics).
- Definitions for civil and hydraulic structures used in SHP (weirs, intake structures, penstocks, tailraces).
- Vocabulary for hydraulic machinery and components (turbines, governors, pump‑turbines, check valves).
- Electrical and control-system terminology specific to small hydropower installations.
- Terms covering site selection, planning outputs and assessment criteria (linked to Part 2: site selection guidance).
- Environmental, social and economic terms relevant to SHP feasibility and impact assessment.
- Requirement: consistent use of defined terms in project documentation to avoid ambiguity between stakeholders and suppliers.
The list above reflects the principal topical coverage and practical requirements for using the vocabulary in design, procurement and regulatory contexts.
Typical use and users
IWA 33-1:2019 is intended for engineers, project developers, equipment manufacturers, procurement teams, regulatory authorities, consultants and academics involved in small hydropower projects. Typical uses include creating specifications, preparing tenders, writing design reports, establishing contracts, developing national guidance and aligning terminology across multi‑disciplinary project teams.
Related standards
Part of the IWA 33 series on small hydropower. Closely related documents include IWA 33-2:2019 (Part 2 — Site selection planning) and other parts addressing design and technical requirements. IWA 33-1:2019 is in the process of being superseded by a formal ISO vocabulary project (ISO/AWI 25259 — Small hydropower plants: Vocabulary). Users should consult the related IWA/ISO parts for site selection, design and operational guidance when applying the vocabulary.
Keywords
small hydropower; SHP; vocabulary; terminology; IWA 33-1; ISO/TC 339; site selection; turbines; penstock; hydrology; hydraulic machinery; electromechanical equipment; environmental assessment.
FAQ
Q: What is this standard?
A: IWA 33-1:2019 is Part 1 (Vocabulary) of the Technical Guidelines for the Development of Small Hydropower Plants. It provides standardized terms and definitions to be used across small hydropower activities and documentation.
Q: What does it cover?
A: It covers professional terms and definitions used in SHP projects, spanning hydrology, civil and hydraulic works, hydraulic machinery, electrical systems, and environmental/social/economic terminology to support planning, design and procurement.
Q: Who typically uses it?
A: Engineers, designers, project developers, equipment manufacturers, procurement specialists, consultants, and regulators involved in small hydropower projects — essentially anyone needing a consistent technical vocabulary for SHP work.
Q: Is it current or superseded?
A: The ISO record indicates IWA 33-1:2019 has been withdrawn from active status in the ISO lifecycle and is being revised/superseded by the developing ISO vocabulary project ISO/AWI 25259 (Small hydropower plants — Vocabulary). Users should check the developing ISO/AWI 25259 for the latest canonical vocabulary.
Q: Is it part of a series?
A: Yes — it is Part 1 of the IWA 33 series on small hydropower. Other parts include IWA 33-2:2019 (site selection planning) and further parts addressing design and technical requirements. The series is intended to work together to guide SHP project development.
Q: What are the key keywords?
A: Small hydropower (SHP), vocabulary, terminology, hydraulic machinery, site selection, penstock, turbine, hydrology, ISO/TC 339, IWA 33.