{"id":37,"date":"2021-01-02T12:27:06","date_gmt":"2021-01-02T12:27:06","guid":{"rendered":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/chapter\/2-2-drawing-a-flow-net-for-a-homogeneous-isotropic-system\/"},"modified":"2021-01-04T19:56:02","modified_gmt":"2021-01-04T19:56:02","slug":"drawing-a-flow-net-for-a-homogeneous-isotropic-system","status":"publish","type":"chapter","link":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/chapter\/drawing-a-flow-net-for-a-homogeneous-isotropic-system\/","title":{"raw":"2.2  Drawing a Flow Net for a Homogeneous Isotropic System","rendered":"2.2  Drawing a Flow Net for a Homogeneous Isotropic System"},"content":{"raw":"<h1 class=\"sub-sub\">Basic Criteria for Drawing Graphical Flow Nets<\/h1>\r\n<ul>\r\n \t<li class=\"import-Normal\">Darcy's Law is valid<\/li>\r\n \t<li class=\"import-Normal\">Hydraulic conductivity of the material is homogeneous<\/li>\r\n \t<li class=\"import-Normal\">Hydraulic conductivity of the material is isotropic<\/li>\r\n \t<li class=\"import-Normal\">The material is fully saturated<\/li>\r\n \t<li class=\"import-Normal\">Flow is steady<\/li>\r\n \t<li class=\"import-Normal\">The fluid has constant density<\/li>\r\n \t<li class=\"import-Normal\">The fluid has constant viscosity<\/li>\r\n \t<li class=\"import-Normal\">The vertical and horizontal axes are drawn to scale.<\/li>\r\n<\/ul>\r\n<h1 class=\"sub-sub\">Steps for Drawing a Flow Net Using Pencil and Paper<\/h1>\r\n<ol>\r\n \t<li>Draw the outline of the flow system to scale and label the nature of each boundary<\/li>\r\n \t<li>Draw equipotential lines along the boundaries where a single value of hydraulic head is specified along the boundary<\/li>\r\n \t<li>Draw flow lines along no-flow boundaries<\/li>\r\n \t<li>Within the flow domain, draw flow lines along paths where you envision groundwater flowing, ensuring they are perpendicular to equipotential lines on the boundaries<\/li>\r\n \t<li>Draw equipotential lines within the flow domain, ensuring they:\r\n<ul style=\"margin-top: 0; margin-bottom: 0; list-style-type: disc;\">\r\n \t<li>are perpendicular to no-flow boundaries;<\/li>\r\n \t<li>are perpendicular to flow lines; and,<\/li>\r\n \t<li>together with flow lines, form shapes of constant aspect ratio, preferably \u201ccurvilinear squares.\u201d A curvilinear square is a four-sided shape with curved edges and an aspect ratio close to one.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li>Calculate the contour interval and label the equipotential lines<\/li>\r\n \t<li>Calculate flow through the net using the equation for total discharge through a flow net which is presented in <a href=\"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/chapter\/calculating-volumetric-discharge\/\">Section 2.4<\/a> following the description of the procedure for drawing a flow net.<\/li>\r\n<\/ol>","rendered":"<h1 class=\"sub-sub\">Basic Criteria for Drawing Graphical Flow Nets<\/h1>\n<ul>\n<li class=\"import-Normal\">Darcy&#8217;s Law is valid<\/li>\n<li class=\"import-Normal\">Hydraulic conductivity of the material is homogeneous<\/li>\n<li class=\"import-Normal\">Hydraulic conductivity of the material is isotropic<\/li>\n<li class=\"import-Normal\">The material is fully saturated<\/li>\n<li class=\"import-Normal\">Flow is steady<\/li>\n<li class=\"import-Normal\">The fluid has constant density<\/li>\n<li class=\"import-Normal\">The fluid has constant viscosity<\/li>\n<li class=\"import-Normal\">The vertical and horizontal axes are drawn to scale.<\/li>\n<\/ul>\n<h1 class=\"sub-sub\">Steps for Drawing a Flow Net Using Pencil and Paper<\/h1>\n<ol>\n<li>Draw the outline of the flow system to scale and label the nature of each boundary<\/li>\n<li>Draw equipotential lines along the boundaries where a single value of hydraulic head is specified along the boundary<\/li>\n<li>Draw flow lines along no-flow boundaries<\/li>\n<li>Within the flow domain, draw flow lines along paths where you envision groundwater flowing, ensuring they are perpendicular to equipotential lines on the boundaries<\/li>\n<li>Draw equipotential lines within the flow domain, ensuring they:\n<ul style=\"margin-top: 0; margin-bottom: 0; list-style-type: disc;\">\n<li>are perpendicular to no-flow boundaries;<\/li>\n<li>are perpendicular to flow lines; and,<\/li>\n<li>together with flow lines, form shapes of constant aspect ratio, preferably \u201ccurvilinear squares.\u201d A curvilinear square is a four-sided shape with curved edges and an aspect ratio close to one.<\/li>\n<\/ul>\n<\/li>\n<li>Calculate the contour interval and label the equipotential lines<\/li>\n<li>Calculate flow through the net using the equation for total discharge through a flow net which is presented in <a href=\"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/chapter\/calculating-volumetric-discharge\/\">Section 2.4<\/a> following the description of the procedure for drawing a flow net.<\/li>\n<\/ol>\n","protected":false},"author":1,"menu_order":5,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-37","chapter","type-chapter","status-publish","hentry"],"part":123,"_links":{"self":[{"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/pressbooks\/v2\/chapters\/37","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":7,"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/pressbooks\/v2\/chapters\/37\/revisions"}],"predecessor-version":[{"id":323,"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/pressbooks\/v2\/chapters\/37\/revisions\/323"}],"part":[{"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/pressbooks\/v2\/parts\/123"}],"metadata":[{"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/pressbooks\/v2\/chapters\/37\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/wp\/v2\/media?parent=37"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/pressbooks\/v2\/chapter-type?post=37"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/wp\/v2\/contributor?post=37"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/books.gw-project.org\/graphical-construction-of-groundwater-flow-nets\/wp-json\/wp\/v2\/license?post=37"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}