BS ISO 24155:2016 pdf download

BS ISO 24155:2016 pdf download.Hydrometry — Hydrometric data transmission systems — Specification of system requirements
1 Scope
This International Standard specifies the technical requirements that should be considered in designing and operating hydrometric data transmission systems (HDTS) and also the necessary functions of those systems. The scope of HDTS is shown in Annex A.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 772, Hydrometry — Vocabulary and symbols
ISO 80000-1, Quantities and units — Part 1: General
ISO/IEC 2382, Information technology — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 772 and ISO/IEC 2382 apply.
4 Basic requirements
4.1 General
This Clause specifies the general requirements for designing an HDTS.
An HDTS shall be designed to meet the basic requirements, defined hereinafter, taking into consideration functionality, geographical structures, time structures, installation conditions, reliability, safety, maintainability and economy. The final system specifications should be determined through the process of repetitive discussions among technological specialists in hydrological and telecommunications fields.
The conceptual configuration of an HDTS is shown in Annex A.
4.2 Objectives of use
An HDTS shall be designed with a full understanding of the necessity and importance of hydrometric services for appropriate water management in drainage basins, such as needed for early warning of high flood levels, or low flows in ecologically sensitive rivers, in which this system is to be used.
4.4 Geographical structures
The following geographical structures shall be determined as a fundamental element of HDTS:
a) location(s) of the remote telemetry station(s);
b) location(s) of the receiving centre(s);
c) location(s) of the relay station(s), if necessary.
A remote telemetry station is located at a selected hydrometric observation point. Therefore, remote telemetry stations are distributed over a geographically wide area, including a drainage basin. Remote telemetry stations cannot always be located at optimum hydrological sites, and may be relocated to alternate sites because of geographical problems and difficulties in data transmission. A receiving centre consists of equipment that receives data from remote telemetry stations for data processing and display. It is located at a site where data and/or information are needed. Therefore, the receiving centre will usually be located within the facility of a user organization. In large drainage basins, receiving centres may be distributed at user organizations near a hydrometric-observation point. According to the necessity of the communication medium, a relay station shall be provided in the system. These geographical structures should be considered not only at the time of designing but also for the future plans.