{"id":294060,"date":"2024-10-19T19:59:17","date_gmt":"2024-10-19T19:59:17","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-183202020\/"},"modified":"2024-10-25T17:11:52","modified_gmt":"2024-10-25T17:11:52","slug":"bs-iso-183202020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-183202020\/","title":{"rendered":"BS ISO 18320:2020"},"content":{"rendered":"
This document specifies methods of determining the stage\u2013d ischarge relationship for gauging stations. It specifies an accuracy for defining the stage\u2013discharge relationship based on a sufficient number of discharge measurements, complete with corresponding stage measurements.<\/p>\n
This document considers stable and unstable channels and includes brief descriptions of the effects on the stage\u2013discharge relationship of the transition from inbank to overbank flows, shifting controls, variable backwater and hysteresis. Methods of determining discharge for twin-gauge stations, ultrasonic velocity-measurement stations and other complex rating curves are not described in detail.<\/p>\n
These types of rating curves are described separately in other International Standards, Technical Specifications and Technical Reports, which are listed in the Bibliography.<\/p>\n<\/div>\n
PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
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2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
7<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
9<\/td>\n | 1 Scope 2 Normative references 3 Terms, definitions and symbols 3.1 Terms and definitions 3.2 Symbols <\/td>\n<\/tr>\n | ||||||
10<\/td>\n | 4 Principle of the stage\u2013discharge relationship 4.1 General <\/td>\n<\/tr>\n | ||||||
11<\/td>\n | 4.2 Controls 4.3 Governing hydraulic formulae <\/td>\n<\/tr>\n | ||||||
13<\/td>\n | 5 Stage\u2013discharge calibration of a gauging station 5.1 General 5.2 Preparation of a stage\u2013discharge relationship 5.2.1 General 5.2.2 List of discharge measurements <\/td>\n<\/tr>\n | ||||||
15<\/td>\n | 5.2.3 Arithmetic plotting scales <\/td>\n<\/tr>\n | ||||||
16<\/td>\n | 5.2.4 Logarithmic plotting scales <\/td>\n<\/tr>\n | ||||||
18<\/td>\n | 5.2.5 Commercially available software <\/td>\n<\/tr>\n | ||||||
19<\/td>\n | 5.2.6 Rating-curve shape <\/td>\n<\/tr>\n | ||||||
20<\/td>\n | 5.3 Curve fitting 5.3.1 General 5.3.2 Hydraulic-formula curves <\/td>\n<\/tr>\n | ||||||
21<\/td>\n | 5.3.3 Mathematical rating curves 5.3.4 Software packages to aid the determination of the rating curve 5.4 Combination-control stage\u2013discharge relationships 5.5 Stable stage\u2013discharge relationships <\/td>\n<\/tr>\n | ||||||
22<\/td>\n | 5.6 Unstable stage\u2013discharge relationships 5.7 Shifting controls <\/td>\n<\/tr>\n | ||||||
23<\/td>\n | 5.8 Variable-backwater effects 5.8.1 General 5.8.2 Downstream backwater influences 5.8.3 Hysteresis effects or loop rating curves <\/td>\n<\/tr>\n | ||||||
26<\/td>\n | 5.9 Extrapolation of the stage\u2013discharge relationship 6 Methods of testing stage\u2013discharge relationships <\/td>\n<\/tr>\n | ||||||
27<\/td>\n | 7 Uncertainty in the stage\u2013discharge relationship 7.1 General 7.2 Definition of uncertainty <\/td>\n<\/tr>\n | ||||||
28<\/td>\n | 7.3 Statistical analysis of the stage\u2013discharge relationship 7.3.1 General 7.3.2 Standard error of estimate <\/td>\n<\/tr>\n | ||||||
29<\/td>\n | 7.3.3 Standard uncertainty <\/td>\n<\/tr>\n | ||||||
30<\/td>\n | 7.4 Uncertainty of predicted discharge <\/td>\n<\/tr>\n | ||||||
31<\/td>\n | Annex A (informative) Types of control <\/td>\n<\/tr>\n | ||||||
32<\/td>\n | Annex B (informative) Complexities of stage\u2013discharge relationships <\/td>\n<\/tr>\n | ||||||
33<\/td>\n | Annex C (informative) Software packages available to evaluate the stage\u2013discharge relationship <\/td>\n<\/tr>\n | ||||||
37<\/td>\n | Annex D (informative) Examples of a hypothetical rating curve <\/td>\n<\/tr>\n | ||||||
39<\/td>\n | Annex E (informative) Example of how hydraulic properties of a river channel properties vary with stage <\/td>\n<\/tr>\n | ||||||
45<\/td>\n | Annex F (informative) Use of shift controls <\/td>\n<\/tr>\n | ||||||
47<\/td>\n | Annex G (informative) Extrapolation of a stage\u2013discharge relationship <\/td>\n<\/tr>\n | ||||||
49<\/td>\n | Annex H (informative) Uncertainty in the stage\u2013discharge relationship and in a continuous measurement of discharge <\/td>\n<\/tr>\n | ||||||
52<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Hydrometry. Measurement of liquid flow in open channels. Determination of the stage-discharge relationship<\/b><\/p>\n |