ISO 6420:2016 ハイドロメトリー — ハイドロメトリックボート用の位置固定装置 | ページ 2

Foreword

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The committee responsible for this document is Technical Committee ISO/TC 113, Hydrometry, Subcommittee SC 5, Instruments, equipment and data management.

This second edition of ISO 6420 cancels and replaces ISO 6420:1984, which has been technically revised. The following major changes have been made:

• information on the use of global navigation satellite systems has been added;
• the former Annexes A and B have been removed;
• the treatment of uncertainty has been expanded and aligned with ISO/TS 25377.

Introduction

The necessity of positioning hydrometric boats arises in several types of measurements on open channels or lakes, reservoirs and estuaries. First, it is necessary to position a boat on a measuring section in order to conduct the appropriate observations of velocity and depth for a discharge measurement. Position fixing also is required for collecting suspended sediment and bedload samples at appropriate verticals on a river cross section. Similarly, positioning of a boat is needed for morphological surveys and sediment sampling of lakes, reservoirs and estuaries.

This document provides information for positioning hydrometric boats with various methods ranging from standard surveying equipment to navigation systems employing signals from the constellation of satellites.

1 Scope

This document specifies methods of determining the position of hydrometric boats based on satellite navigation systems and/or with respect to known points on the banks of rivers, estuaries or lakes. It applies to electronic positioning equipment and conventional surveying techniques.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purpose of this document, the terms and definitions given in ISO 772 apply.

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Bibliography