{"id":293838,"date":"2024-10-19T19:58:13","date_gmt":"2024-10-19T19:58:13","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-91232017\/"},"modified":"2024-10-25T17:10:13","modified_gmt":"2024-10-25T17:10:13","slug":"bs-iso-91232017","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-91232017\/","title":{"rendered":"BS ISO 9123:2017"},"content":{"rendered":"<p>This document specifies methods for determining stage-fall-discharge relationships for a stream reach where variable backwater occurs either intermittently or continuously. Two gauging stations, a base reference gauge and an auxiliary gauge are required for gauge height measurements. A number of discharge measurements are required in order to calibrate the rating to the accuracy required by this document.<\/p>\n<p>The preparation of rating curves is not described in detail in this document.<\/p>\n<blockquote>\n<p>NOTE For a more detailed description of preparing rating curves, see the methods described in ISO&nbsp;1100\u20112 .<\/p>\n<\/blockquote>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>2<b><\/td>\n<td>National foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>7<b><\/td>\n<td>Foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>9<b><\/td>\n<td>1 Scope <br \/> 2 Normative references <br \/> 3 Terms and definitions <br \/> 4 Symbols and abbreviated terms <br \/> 4.1 Symbols  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>4.2 Abbreviations  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>5 General considerations <br \/> 5.1 Importance of backwater <br \/> 5.2 Backwater conditions <br \/> 5.3 Gauging requirements  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>5.4 Types of stage-fall-discharge relationships <br \/> 6 Unit-fall method <br \/> 6.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>6.2 Method of analysis <br \/> 6.3 Computation of discharge <br \/> 6.4 Example of unit-fall method  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>7 Constant-fall method <br \/> 7.1 General <br \/> 7.2 Method of analysis <br \/> 7.3 Computation of discharge <br \/> 7.4 Example of constant-fall method  <\/td>\n<\/tr>\n<tr>\n<td><b>18<b><\/td>\n<td>8 Variable-fall method <br \/> 8.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>19<b><\/td>\n<td>8.2 Normal-fall method <br \/> 8.3 Limiting-fall method <br \/> 8.3.1 General <br \/> 8.3.2 Method of analysis <br \/> 8.3.3 Computation of discharge  <\/td>\n<\/tr>\n<tr>\n<td><b>20<b><\/td>\n<td>8.3.4 Example of limiting-fall method  <\/td>\n<\/tr>\n<tr>\n<td><b>24<b><\/td>\n<td>9 Rating curves and tables <br \/> 10 Method of computation <br \/> 11 Periodic checking of stage-fall-discharge ratings <br \/> 12 Extrapolations <br \/> 13 Evaluation of uncertainty in the stage-fall-discharge relation <br \/> 13.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>25<b><\/td>\n<td>13.2 Implementing the GUM procedure for evaluating uncertainty in the stage-fall-discharge relation and derived estimates <br \/> 13.2.1 General <br \/> 13.2.2 Propagation of uncertainty for stage-fall-discharge estimates  <\/td>\n<\/tr>\n<tr>\n<td><b>26<b><\/td>\n<td>13.2.3 Uncertainty in rating curve  <\/td>\n<\/tr>\n<tr>\n<td><b>29<b><\/td>\n<td>13.2.4 Uncertainty in the measured stage <br \/> 13.2.5 Uncertainty in the measured fall <br \/> 13.2.6 Prediction intervals of estimated discharge <br \/> 13.2.7 Uncertainty caused by neglecting all other physical parameters  <\/td>\n<\/tr>\n<tr>\n<td><b>30<b><\/td>\n<td>13.3 Example <br \/> 13.3.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>31<b><\/td>\n<td>13.3.2 Standard error of estimate <br \/> 13.3.3 Uncertainty of mean response  <\/td>\n<\/tr>\n<tr>\n<td><b>32<b><\/td>\n<td>13.3.4 Uncertainty in measured stage and fall <br \/> 13.3.5 Uncertainty caused by neglecting all other physical parameters <br \/> 13.3.6 Propagation of uncertainty in discharge estimation  <\/td>\n<\/tr>\n<tr>\n<td><b>33<b><\/td>\n<td>13.3.7 Uncertainty in the predicted discharge  <\/td>\n<\/tr>\n<tr>\n<td><b>35<b><\/td>\n<td>Annex A (informative) Multiple least squares regression \u2014 Matrix representation  <\/td>\n<\/tr>\n<tr>\n<td><b>37<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Hydrometry. Stage-fall-discharge relationships<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2017<\/td>\n<td>38<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":293841,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[265,2641],"product_tag":[],"class_list":{"0":"post-293838","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-17-120-20","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/293838","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/293841"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=293838"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=293838"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=293838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}