ISO 4362:1999 水文測定 — 構造物を使用したオープンチャネルでの流量測定 — 台形のブロードクレステッド堰 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, 3.

Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

International Standard ISO 4362 was prepared by Technical Committee ISO/TC 113, Hydrometric determinations, Subcommittee SC 2, Notches, weirs and flumes.

This second edition cancels and replaces the first edition (ISO 4362:1992), which has been extended to include the use of the weir in trapezoidal channels in addition to its use in rectangular channels.

1 Scope

This International Standard specifies a method of steady-flow measurement in open channels using a trapezoidal broad-crested weir under modular and non-modular conditions. Consideration is given to the use of the weir in both rectangular and trapezoidal channels.

Limitations to the use of the weir are given in 7.6 and 8.6.

2 Normative reference

The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, the document do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards.

3 Terms and definitions

For the purposes of this International Standard, the terms and definitions given in ISO 772 apply.

Bibliography