{"version":"1.0","provider_name":"GeoStru EU","provider_url":"https:\/\/www.geostru.eu\/ro\/","author_name":"GeoStru EU","author_url":"https:\/\/www.geostru.eu\/ro\/","title":"Hydrologic Risk 2026 - moto permanente - scaduti - en","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"ZbcZmyntk7\"><a href=\"https:\/\/www.geostru.eu\/ro\/newsletter\/hydrologic-risk-2026-moto-permanente-scaduti-en\/\">Hydrologic Risk 2026 &#8211; moto permanente &#8211; scaduti &#8211; en<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.geostru.eu\/ro\/newsletter\/hydrologic-risk-2026-moto-permanente-scaduti-en\/embed\/#?secret=ZbcZmyntk7\" width=\"600\" height=\"338\" title=\"&#8222;Hydrologic Risk 2026 &#8211; moto permanente &#8211; scaduti &#8211; en&#8221; &#8211; GeoStru EU\" data-secret=\"ZbcZmyntk7\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n<\/script>\n","description":"Mixed regime, hydraulic jump by momentum, separate channel and overbanks: validated on 1,307 cross-sections and on the official USACE examples. \u034f\u200c\u00a0\u034f\u200c\u00a0\u034f\u200c\u00a0\u034f\u200c Not displaying correctly? Open in browser Software update Hydrologic Risk \u00b7 hydraulic analysis A NEW STEADY-FLOW ENGINE, VALIDATED CROSS-SECTION BY CROSS-SECTION Water surface profile for return periods of 50, 200 and 500 years, with critical elevation and energy grade line, computed by the new engine on the tutorial project. Dear {firstname|colleague}, HYDROLOGIC RISK now has a new computation engine for STEADY FLOW analysis. The water surface profile is computed in MIXED REGIME: the program decides, cross-section by cross-section, where the flow is subcritical and where it is supercritical, and locates the HYDRAULIC JUMP, without you having to choose the computation direction in advance. Before releasing it we tested it against analytical solutions, against the OFFICIAL USACE EXAMPLES and against HEC-RAS 6.6. On the analytical cases the difference from the reference is below 0.1\u00a0MM; on the _Mixed Flow Regime Channel_ example it is at most 0.2\u00a0MM, with the jump at the same cross-section. The validation dossier is published on geostru.eu. How the new engine works \u2713 STANDARD STEP, WITH NO SCAN STEP TO SET \u2014 the energy balance is imposed between consecutive cross-sections and the depth is obtained by solving the equation directly. Reaches that are too long are split into sub-steps. \u2713 MIXED REGIME, JUMP BY MOMENTUM \u2014 subcritical flow is computed from downstream to upstream, supercritical flow from upstream to downstream; at each cross-section the profile with the larger specific force M\u00a0=\u00a0A\u00b7yG\u00a0+\u00a0Q\u00b2\/(gA) prevails. Where subcritical flow prevails, the jump forms. \u2713 SEPARATE CHANNEL AND OVERBANKS \u2014 each cross-section is split into left overbank, main channel and right overbank, each with its own Strickler Ks. Conveyance K\u00a0=\u00a0Ks\u00b7A\u00b7R2\/3, Coriolis coefficient \u03b1 from the conveyance distribution, average friction slope from the conveyances of the two cross-sections. \u2713 CONTRACTION AND EXPANSION LOSSES \u2014 in addition to friction, local losses on the change in velocity head (coefficients 0.1 and 0.3). \u2713 BOUNDARY CONDITIONS AT BOTH ENDS \u2014 for each return period: normal depth, critical depth or known water level, downstream for subcritical flow and upstream for supercritical flow. When in doubt, normal depth at both ends. \u2713 WARNINGS AND RESULTS \u2014 at the end of the run the program flags cross-sections that are too far apart, passages through critical depth and regime changes. For each return period: profile with critical elevation and energy, and a copyable table with discharge, depth, velocity and Froude number. The validation \u00a0 The dossier follows the structure required by the Italian building code NTC 2018 (\u00a710.2) for the reliability of computation software. HEC-RAS 6.6 was run with a 0.1\u00a0mm tolerance instead of the default 3\u00a0mm, for a like-for-like comparison. Test Result ANALYTICAL CASES 7 profiles (M1, M2, S2, jump), 1,307 cross-sections within 0.1\u00a0MM of the reference, within 2\u00a0mm of HEC-RAS; same regime at every cross-section OFFICIAL USACE EXAMPLES Mixed Flow Regime Channel, Critical Creek, Channel Modification mixed regime: max 0.2\u00a0MM, jump at the same cross-section; median difference of 1.6\u20131.8\u00a0cm in the other two 9 REAL PROJECTS exported from Hydrologic Risk to HEC-RAS 8 OUT OF 9 WITHIN 1.2\u00a0CM, with a median difference below 1.3\u00a0mm Where the differences grow, the dossier explains why, cross-section by cross-section: these are reaches where HEC-RAS itself does not balance the energy equation, or where a cross-section has two energy minima. The test case files can be downloaded by licensed customers. Read the validation dossier ------------------------- Also in this version \u2713 HEC-RAS IMPORT AND EXPORT \u2014 _Export HEC-RAS_ writes the complete project (.prj, .g01, .f01, .p01) for a cross-check; _Import from HEC-RAS_ brings an existing project into Hydrologic Risk. \u2713 RAINFALL FROM HYDROGEO NX \u2014 search for the rain gauge by name and the annual maxima for 1, 3, 6, 12 and 24 hours are loaded into the project; Gumbel and the depth-duration curve h\u00a0=\u00a0a\u00b7tn are recomputed for each return period. \u2713 CATCHMENT FROM GEOSTRU MAPS \u2014 one click on the river at the outlet: watershed divide, stream network and main channel from the TINITALY 10\u00a0m DTM (INGV), with area, elevations and slope. The catchment arrives in Hydrologic Risk already triangulated, without going through a GIS. \u2713 FLOOD MAPS, ALSO IN 3D \u2014 the computed water surface is interpolated between cross-sections and compared with the DTM: flooded area, volume and maximum depth for each return period, in plan and in the 3D view, one return period at a time. \u2713 DRAWINGS WITH CAD TOOLS \u2014 the plan with the flood map opens as a DXF in CAD Tools, in the browser: take measurements, then set sheet size, scale and title block with _Compose sheet_. A free GeoStru account is all you need to save and print. \u2713 THE NEW MANUAL \u2014 online at help.geostru.io in English, Italian, Spanish and Romanian. The steady-flow page explains how the program computes and how to choose the boundary conditions. The full tutorial \u00a0 20 minutes, 16 chapters, on a real 76\u00a0km\u00b2 catchment: from rainfall to the flood map. The video is in Italian; boundary conditions and steady flow start at 12:42. YOUR HYDROLOGIC RISK UPDATE PERIOD HAS EXPIRED. Renew from your CUSTOMER AREA to move to the new version, with the new computation engine, and to all future ones. Renewal costs 10% OF THE PROGRAM PRICE per year and includes updates and technical support. Your welcome-back code BENTORNATO-HYDROLOGICRISK \u221215% on your Hydrologic Risk renewal. Valid until 30 NOVEMBER 2026, one use per customer. Renew and download the new version Find out more \u2022 Validation dossier test cases, comparisons with HEC-RAS 6.6 and analysis of the differences \u2022 Manual: steady-flow analysis how the program computes and how to choose the boundary conditions \u2022 Full Hydrologic Risk manual available in English, Italian, Spanish and Romanian ------------------------- If you have any questions, we are here to help. Kind regards, THE GEOSTRU TEAM GeoStru  Software for engineering, geotechnics and geology www.geostru.eu \u00b7 Hydrologic Risk manual \u00b7 info@geostru.eu  You receive this email as a GeoStru customer. Unsubscribe \u00a9 GeoStru \u00b7 web","thumbnail_url":"https:\/\/www.geostru.eu\/wp-content\/uploads\/brevo\/geostru-logo.png"}