BS ISO 1438:2017 – TC:2020 Edition
$280.87
Tracked Changes. Hydrometry. Open channel flow measurement using thin-plate weirs
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 175 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 105 | undefined |
| 110 | Foreword |
| 112 | 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols and abbreviated terms |
| 113 | 5 Principle 6 Installation 6.1 General 6.2 Selection of site 6.3 Installation conditions 6.3.1 General |
| 114 | 6.3.2 Weir 6.3.3 Approach channel |
| 115 | 6.3.4 Downstream channel 7 Measurement of head 7.1 Head-measuring devices |
| 116 | 7.2 Stilling or float well 7.3 Head-measurement section 7.3.1 Upstream head-measurement 7.3.2 Downstream head measurement 7.4 Head-gauge datum (gauge zero) |
| 117 | 8 Maintenance 9 Rectangular thin-plate weir 9.1 Types |
| 119 | 9.2 Specifications for the standard weir 9.3 Specifications for installation 9.4 Determination of gauge zero |
| 122 | 9.5 Discharge formulae — General 9.6 Formulae for the basic weir form (all values of b/B) 9.6.1 Kindsvater-Carter formula 9.6.2 Evaluation of Cd, kb and kh |
| 124 | 9.6.3 Formulae for Cd |
| 125 | 9.6.4 Practical limitations on h/p, h, b and p 9.7 Formulae for full-width weirs (b/B = 1,0) 9.7.1 Modular flow discharge formula |
| 126 | 9.7.2 Non-modular flow discharge formula |
| 127 | 10 Triangular-notch thin-plate weir 10.1 Specifications for the standard weir |
| 130 | 10.2 Specifications for the installation 10.3 Specifications for head measurement 10.3.1 General 10.3.2 Determination of notch angle 10.3.3 Determination of gauge zero |
| 131 | 10.4 Discharge formulae — General 10.5 Formula for all notch angles between π/9 and 5 π/9 radians (20° and 100°) 10.5.1 Kindsvater-Shen formula 10.5.2 Evaluation of Cd and kh |
| 133 | 10.5.3 Practical limitations on α, h/p, p/B, h and p 10.6 Formula for specific notch angles (fully-contracted weir) |
| 134 | 10.7 Accuracy of discharge coefficients — Triangular-notch weirs 11 Uncertainties of flow measurement 11.1 General |
| 135 | 11.2 Combining measurement uncertainties |
| 136 | 11.3 Uncertainty of discharge coefficient, u*(Cd), for thin-plate weirs |
| 137 | 11.4 Uncertainty budget 12 Example 12.1 General 12.2 Characteristics — Gauging structure |
| 138 | 12.3 Characteristics — Gauged head instrumentation 12.4 Discharge coefficient 12.5 Discharge estimate 12.6 Uncertainty statement |
| 141 | Annex A (informative) Flow measurement with small weir tanks |
| 143 | Annex B (normative) Guide to the design and installation of a flow straightener |
| 145 | Annex C (informative) Introduction to measurement uncertainty |
| 153 | Annex D (informative) Sample measurement performance for use in hydrometric worked examples |
| 156 | Annex E (informative) Specimen tables |
| 171 | Bibliography |
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BS ISO 1438:2017
Hydrometry. Open channel flow measurement using thin-plate weirs Published By Publication Date Number of Pages…
