{"id":4183,"date":"2020-10-01T20:28:04","date_gmt":"2020-10-01T19:28:04","guid":{"rendered":"https:\/\/www.nickzom.org\/blog\/?p=4183"},"modified":"2024-04-21T15:26:56","modified_gmt":"2024-04-21T14:26:56","slug":"how-to-calculate-and-solve-for-stage-discharge-extension-irrigation-water-requirement","status":"publish","type":"post","link":"https:\/\/www.nickzom.org\/blog\/2020\/10\/01\/how-to-calculate-and-solve-for-stage-discharge-extension-irrigation-water-requirement\/","title":{"rendered":"How to Calculate and Solve for Stage Discharge Extension | Irrigation Water Requirement"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignnone size-full wp-image-4206\" src=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/stage-discharge-extension.png\" alt=\"\" width=\"240\" height=\"210\" \/><\/p>\n<p>The image above represents stage discharge extension. To calculate stage discharge extension, four essential parameters are needed, and these parameters are <strong>Area of Cross-Section (A), Roughness Co-efficient (c), Hydraulic Radius (R)\u00a0<\/strong>and\u00a0<strong>Slope in (%) of the Energy Line (s).<\/strong><\/p>\n<p>The formula for calculating stage discharge extension.<\/p>\n<p>Q = Ac\u221a(Rs)<\/p>\n<p>Where:<\/p>\n<p>Q = Stage Discharge Extension<br \/>\nA = Area of Cross-Section<br \/>\nc = Roughness Co-efficient<br \/>\nR = Hydraulic Radius<br \/>\ns = Slope in (%) of the Energy Line<\/p>\n<p>Let&#8217;s solve an example;<br \/>\nFind the stage discharge extension when the area of cross-section is 12, the roughness co-efficient is 16, the hydraulic radius is 13 and the slope in (%) of the energy line is 11.<\/p>\n<p>This implies that;<\/p>\n<p>A = Area of Cross-Section 12<br \/>\nc = Roughness Co-efficient = 16<br \/>\nR = Hydraulic Radius = 13<br \/>\ns = Slope in (%) of the Energy Line = 11<\/p>\n<p>Q = Ac\u221a(Rs)<br \/>\nQ = 12(16)\u221a(13(11))<br \/>\nThat is, Q = 192\u221a(143)<br \/>\nQ = 192(11.95)<br \/>\nQ = 2295.9<\/p>\n<p>Therefore, the\u00a0<strong>stage discharge extension\u00a0<\/strong>is\u00a0<strong>2295.9.<\/strong><\/p>\n<h3><strong>Calculating the Area of Cross-Sectional when the Stage Discharge Extension, the Roughness Co-efficient, the Hydraulic Radius and the Slope in (%) of the energy line are Given<\/strong><\/h3>\n<p>A = <sup>Q<\/sup> \/ <sub>c \u221aRS<\/sub><\/p>\n<p>Where;<\/p>\n<p>A = Area of Cross-Section<br \/>\nQ = Stage Discharge Extension<br \/>\nc = Roughness Co-efficient<br \/>\nR = Hydraulic Radius<br \/>\ns = Slope in (%) of the Energy Line<\/p>\n<p>Let&#8217;s solve an example;<br \/>\nFind the area of cross-section when the stage discharge extension is 14, the roughness co-efficient is 10, the hydraulic radius is 9 and the slope in (%) of the energy line is 5.<\/p>\n<p>This implies that;<\/p>\n<p>Q = Stage Discharge Extension = 14<br \/>\nc = Roughness Co-efficient = 10<br \/>\nR = Hydraulic Radius = 9<br \/>\ns = Slope in (%) of the Energy Line = 5<\/p>\n<p>A = <sup>Q<\/sup> \/ <sub>c \u221aRS<\/sub><br \/>\nA = <sup>14<\/sup> \/ <sub>10 \u221a(9)(5)<\/sub><br \/>\nThen, A = <sup>14<\/sup> \/ <sub>10 (6.70)<\/sub><br \/>\nA = <sup>14<\/sup> \/ <sub>67<\/sub><br \/>\nA = 0.208<\/p>\n<p>Therefore, the\u00a0<strong>area of cross-section\u00a0<\/strong>is\u00a0<strong>0.208.<\/strong><\/p>\n<p>Read more:\u00a0<a href=\"https:\/\/www.nickzom.org\/blog\/2020\/10\/02\/how-to-calculate-and-solve-for-expected-discharge-flood-formulae-irrigation-water-requirement\/\">How to Calculate and Solve for Expected Discharge | Flood Formulae | Irrigation Water Requirement<\/a><\/p>\n<h3><strong>Calculating the Roughness Co-efficient when the Stage Discharge Extension, Area of Cross-Sectional, the Hydraulic Radius and the Slope in (%) of the energy line are Given<\/strong><\/h3>\n<p>c = <sup>Q<\/sup> \/ <sub>A \u221aRS<\/sub><\/p>\n<p>Where;<\/p>\n<p>c = Roughness Co-efficient<br \/>\nQ = Stage Discharge Extension<br \/>\nA = Area of Cross-Section<br \/>\nR = Hydraulic Radius<br \/>\ns = Slope in (%) of the Energy Line<\/p>\n<p>Let&#8217;s solve an example;<br \/>\nFind the roughness co-efficient when the stage discharge extension is 32, the area of cross-section is 10, the hydraulic radius is 20, and the slope in (%) of the energy line is 5.<\/p>\n<p>This implies that;<\/p>\n<p>Q = Stage Discharge Extension = 32<br \/>\nA = Area of Cross-Section = 10<br \/>\nR = Hydraulic Radius = 20<br \/>\ns = Slope in (%) of the Energy Line = 5<\/p>\n<p>c = <sup>Q<\/sup> \/ <sub>A \u221aRS<\/sub><br \/>\nSo, c = <sup>32<\/sup> \/ <sub>10 \u221a(20)(5)<\/sub><br \/>\nc = <sup>32<\/sup> \/ <sub>10 \u221a100<\/sub><br \/>\nc = <sup>32<\/sup> \/ <sub>10 (10)<\/sub><br \/>\nThat is, c = <sup>32<\/sup> \/ <sub>10<\/sub><br \/>\nc = 3.2<\/p>\n<p>Therefore, the\u00a0<strong>roughness co-efficient\u00a0<\/strong>is\u00a0<strong>3.2.<\/strong><\/p>\n<h3><strong>Calculating the Hydraulic Radius when the Stage Discharge Extension, Area of Cross-Sectional, the Roughness Co-efficient and the Slope in (%) of the energy line are Given<\/strong><\/h3>\n<p>R = <sup>(<sup>Q<\/sup> \/ <sub>Ac<\/sub>)<sup>2<\/sup><\/sup> \/ <sub>S<\/sub><\/p>\n<p>Where;<\/p>\n<p>R = Hydraulic Radius<br \/>\nQ = Stage Discharge Extension<br \/>\nA = Area of Cross-Section<br \/>\nc = Roughness Co-efficient<br \/>\ns = Slope in (%) of the Energy Line<\/p>\n<p>Let&#8217;s solve an example;<br \/>\nFind the hydraulic radius when the stage discharge extension is 40, the area of cross-section is 8, the roughness co-efficient is 4 and the slope in (%) of the energy line is 4.<\/p>\n<p>This implies that;<\/p>\n<p>Q = Stage Discharge Extension = 40<br \/>\nA = Area of Cross-Section = 8<br \/>\nc = Roughness Co-efficient = 4<br \/>\ns = Slope in (%) of the Energy Line = 4<\/p>\n<p>R = <sup>(<sup>Q<\/sup> \/ <sub>Ac<\/sub>)<sup>2<\/sup><\/sup> \/ <sub>S<\/sub><br \/>\nSo, R = <sup>(<sup>40<\/sup> \/ <sub>8 x 4<\/sub>)<sup>2<\/sup><\/sup> \/ <sub>4<\/sub><br \/>\nR = <sup>(<sup>40<\/sup> \/ <sub>32<\/sub>)<sup>2<\/sup><\/sup> \/ <sub>4<\/sub><br \/>\nR = <sup>(1.25)<sup>2<\/sup><\/sup> \/ <sub>4<\/sub><br \/>\nThat is, R = <sup>1.5625<\/sup> \/ <sub>4<\/sub><br \/>\nR = 0.14<\/p>\n<p>Therefore, the <strong>hydraulic radius\u00a0<\/strong>is\u00a0<strong>0.14.<\/strong><\/p>\n<h3><strong>Calculating the Slope in (%) of the energy line when the Stage Discharge Extension, Area of Cross-Sectional, the Roughness Co-efficient and the Hydraulic Radius are Given<\/strong><\/h3>\n<p>S = <sup>(<sup>Q<\/sup> \/ <sub>Ac<\/sub>)<sup>2<\/sup><\/sup> \/ <sub>R<\/sub><\/p>\n<p>Where;<\/p>\n<p>s = Slope in (%) of the Energy Line<br \/>\nQ = Stage Discharge Extension<br \/>\nA = Area of Cross-Section<br \/>\nc = Roughness Co-efficient<br \/>\nR = Hydraulic Radius<\/p>\n<p>Let&#8217;s solve an example;<br \/>\nFind the slope in (%) of the energy line when the stage discharge extension is 30, the area of cross-section is 12, the roughness co-efficient is 6 and the hydraulic radius is 2.<\/p>\n<p>This implies that;<\/p>\n<p>Q = Stage Discharge Extension = 30<br \/>\nA = Area of Cross-Section = 12<br \/>\nc = Roughness Co-efficient = 6<br \/>\nR = Hydraulic Radius = 2<\/p>\n<p>S = <sup>(<sup>Q<\/sup> \/ <sub>Ac<\/sub>)<sup>2<\/sup><\/sup> \/ <sub>R<\/sub><br \/>\nS = <sup>(<sup>30<\/sup> \/ <sub>12 x 6<\/sub>)<sup>2<\/sup><\/sup> \/ <sub>2<\/sub><br \/>\nThen, S = <sup>(0.416)<sup>2<\/sup><\/sup> \/ <sub>2<\/sub><br \/>\nS = <sup>0.173056<\/sup> \/ <sub>2<\/sub><br \/>\nS = 0.086<\/p>\n<p>Therefore, the\u00a0<strong>slope in (%) of the energy line\u00a0<\/strong>is\u00a0<strong>0.086.<\/strong><\/p>\n<h3><strong>How to Calculate Stage Discharge Extension Using Nickzom<\/strong><\/h3>\n<p>Nickzom Calculator \u2013\u00a0<strong>The Calculator Encyclopedia<\/strong> is capable of calculating the stage discharge extension.<\/p>\n<p>To get the answer and workings of the stage discharge extension using the <strong>Nickzom Calculator \u2013 The Calculator Encyclopedia.\u00a0<\/strong>First, you need to obtain the app.<\/p>\n<p>You can get this app via any of these means:<\/p>\n<p><strong>Web<\/strong>\u00a0\u2013\u00a0<a href=\"https:\/\/www.nickzom.org\/calculator-plus\">https:\/\/www.nickzom.org\/calculator-plus<\/a><\/p>\n<p>To get access to the\u00a0<strong>professional\u00a0<\/strong>version via web, you need to\u00a0<strong>register<\/strong>\u00a0and\u00a0<strong>subscribe\u00a0<\/strong>for<strong>\u00a0NGN 2,000\u00a0<\/strong>per<strong>\u00a0annum<\/strong>\u00a0to have utter access to all functionalities.<br \/>\nYou can also try the\u00a0<strong>demo\u00a0<\/strong>version via\u00a0<a href=\"https:\/\/www.nickzom.org\/calculator\">https:\/\/www.nickzom.org\/calculator<\/a><\/p>\n<p><strong>Android (Paid)<\/strong>\u00a0\u2013\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=org.nickzom.nickzomcalculator\">https:\/\/play.google.com\/store\/apps\/details?id=org.nickzom.nickzomcalculator<\/a><br \/>\n<strong>Android (Free)<\/strong>\u00a0\u2013\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.nickzom.nickzomcalculator\">https:\/\/play.google.com\/store\/apps\/details?id=com.nickzom.nickzomcalculator<\/a><br \/>\n<strong>Apple (Paid)<\/strong>\u00a0\u2013\u00a0<a href=\"https:\/\/itunes.apple.com\/us\/app\/nickzom-calculator\/id1331162702?mt=8\">https:\/\/itunes.apple.com\/us\/app\/nickzom-calculator\/id1331162702?mt=8<\/a><br \/>\nOnce, you have obtained the calculator encyclopedia app, proceed to the\u00a0<strong>Calculator Map,\u00a0<\/strong>then click on\u00a0<strong>Agricultural<\/strong><b>\u00a0<\/b>under\u00a0<strong>Engineering<\/strong><strong>.<\/strong><\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-3799 size-full\" src=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/09\/Screenshot-1478.png\" alt=\"\" width=\"1366\" height=\"768\" srcset=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/09\/Screenshot-1478.png 1366w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/09\/Screenshot-1478-300x169.png 300w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/09\/Screenshot-1478-1024x576.png 1024w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/09\/Screenshot-1478-768x432.png 768w\" sizes=\"(max-width: 1366px) 100vw, 1366px\" \/><\/p>\n<p>Now, Click on\u00a0<strong>Irrigation Water Requirement\u00a0<\/strong>under\u00a0<strong>Agricultural<\/strong><\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-4177 size-full\" src=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1683.png\" alt=\"\" width=\"1366\" height=\"768\" srcset=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1683.png 1366w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1683-300x169.png 300w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1683-1024x576.png 1024w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1683-768x432.png 768w\" sizes=\"(max-width: 1366px) 100vw, 1366px\" \/><\/p>\n<p>Now, Click on <strong>Stage Discharge Extension<\/strong><strong>\u00a0<\/strong>under\u00a0<strong>Irrigation Water Requirement<\/strong><\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-4216 size-full\" src=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1713.png\" alt=\"How to Calculate and Solve for Stage Discharge Extension | Irrigation Water Requirement\" width=\"1366\" height=\"768\" srcset=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1713.png 1366w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1713-300x169.png 300w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1713-1024x576.png 1024w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1713-768x432.png 768w\" sizes=\"(max-width: 1366px) 100vw, 1366px\" \/><\/p>\n<p>The screenshot below displays the page or activity to enter your values, to get the answer for the stage discharge extension according to the respective parameters which is the <strong>Area of Cross-Section (A), Roughness Co-efficient (c), Hydraulic Radius (R)\u00a0<\/strong>and\u00a0<strong>Slope in (%) of the Energy Line (s).<\/strong><\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-4215 size-full\" src=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1714.png\" alt=\"\" width=\"1366\" height=\"768\" srcset=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1714.png 1366w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1714-300x169.png 300w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1714-1024x576.png 1024w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1714-768x432.png 768w\" sizes=\"(max-width: 1366px) 100vw, 1366px\" \/><\/p>\n<p>Now, enter the values appropriately and accordingly for the parameters as required by the <strong>Area of Cross-Section (A)<\/strong> is <strong>12<\/strong>,<strong> Roughness Co-efficient (c)<\/strong> is <strong>16<\/strong>,<strong> Hydraulic R<\/strong><strong>adius (R) <\/strong>is <strong>13 <\/strong>and\u00a0<strong>Slope in (%) of the Energy Line (s)<\/strong> is <strong>11<\/strong>.<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-4214 size-full\" src=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1715.png\" alt=\"How to Calculate and Solve for Stage Discharge Extension | Irrigation Water Requirement\" width=\"1366\" height=\"768\" srcset=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1715.png 1366w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1715-300x169.png 300w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1715-1024x576.png 1024w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1715-768x432.png 768w\" sizes=\"(max-width: 1366px) 100vw, 1366px\" \/><\/p>\n<p>Finally, Click on Calculate<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-4213 size-full\" src=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1716.png\" alt=\"How to Calculate and Solve for Stage Discharge Extension | Irrigation Water Requirement\" width=\"1366\" height=\"768\" srcset=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1716.png 1366w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1716-300x169.png 300w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1716-1024x576.png 1024w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1716-768x432.png 768w\" sizes=\"(max-width: 1366px) 100vw, 1366px\" \/><br \/>\n<img decoding=\"async\" class=\"alignnone wp-image-4217 size-full\" src=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1717.png\" alt=\"\" width=\"1366\" height=\"768\" srcset=\"https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1717.png 1366w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1717-300x169.png 300w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1717-1024x576.png 1024w, https:\/\/www.nickzom.org\/blog\/wp-content\/uploads\/2020\/10\/Screenshot-1717-768x432.png 768w\" sizes=\"(max-width: 1366px) 100vw, 1366px\" \/><\/p>\n<p>As you can see from the screenshot above,\u00a0<strong>Nickzom Calculator<\/strong>\u2013 The Calculator Encyclopedia solves for the stage discharge extension and presents the formula, workings and steps too.<\/p>\n","protected":false},"excerpt":{"rendered":"The image above represents stage discharge extension. To calculate stage discharge extension, four essential parameters are needed, and&hellip;","protected":false},"author":5,"featured_media":14121,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_opengraph-title":"","_yoast_wpseo_opengraph-description":"","_yoast_wpseo_twitter-title":"","_yoast_wpseo_twitter-description":"","_lmt_disableupdate":"","_lmt_disable":"","_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","_yoast_wpseo_focuskw_text_input":"","csco_display_header_overlay":false,"csco_singular_sidebar":"","csco_page_header_type":"","footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[47],"tags":[828,1215,60,298,1207,1216,1217,1218],"class_list":["post-4183","post","type-post","status-publish","format-standard","has-post-thumbnail","category-engineering","tag-agricultural","tag-area-of-cross-sectonal","tag-engineering","tag-hydraulic-radius","tag-irrigation-water-requirement","tag-roughness-co-efficient","tag-slope-in-of-the-energy-line","tag-stage-discharge-extension","cs-entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Calculate and Solve for Stage Discharge Extension | Irrigation Water Requirement<\/title>\n<meta name=\"description\" content=\"Learn the steps and formula on How to Calculate Stage Discharge Extension in Irrigation Water Requirement. 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