{"id":2103,"date":"2026-10-27T11:19:40","date_gmt":"2026-10-27T10:19:40","guid":{"rendered":"https:\/\/au.feri.um.si\/losdv\/projekti\/iztekanje-vodovod\/"},"modified":"2026-10-27T12:05:19","modified_gmt":"2026-10-27T11:05:19","slug":"iztekanje-vodovod","status":"publish","type":"page","link":"https:\/\/au.feri.um.si\/losdv\/projekti\/iztekanje-vodovod\/","title":{"rendered":"Ocenjevanje iztekanja iz vodovodnega sistema s slikami SAR"},"content":{"rendered":"\n<section class=\"wp-block-group alignfull au-section au-section--dark au-projhero is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group au-container is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"au-back wp-block-paragraph\"><a href=\"\/losdv\/#iz-nasega-dela\">\u2190 Projekti in zaklju\u010dna dela<\/a><\/p>\n\n\n<p class=\"au-eyebrow wp-block-paragraph\">01.4 \u00b7 Raziskovalni projekt ESA<\/p>\n\n\n<h1 class=\"wp-block-heading\">Ocenjevanje iztekanja iz vodovodnega sistema s slikami SAR<\/h1>\n\n\n<p class=\"au-lead wp-block-paragraph\">Iz polarimetri\u010dnih radarskih slik satelita ALOS-2 i\u0161\u010demo mesta, kjer voda izteka iz zakopanih vodovodnih cevi \u2013 za pregled celotnega omre\u017eja naenkrat.<\/p>\n\n\n<div class=\"anim-box\">\n      <canvas id=\"anim\" aria-label=\"Animacija: satelit ALOS-2 preleti Maribor in zajame sliko SAR; za njim nevronska mre\u017ea na vodovodnem omre\u017eju ozna\u010di mesta z ve\u010djo verjetnostjo iztekanja.\"><\/canvas>\n      <div class=\"anim-cap mono\"><span>Ponazoritev \u00b7 slika SAR ALOS-2 nad Mariborom \u2192 karta verjetnosti iztekanja (omre\u017eje in mesta so ponazorjena)<\/span><button class=\"anim-toggle\" type=\"button\">Ustavi<\/button><\/div>\n    <\/div>\n<\/div>\n<\/section>\n\n\n\n<section class=\"wp-block-group alignfull au-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group au-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-columns au-projbody is-layout-flex wp-container-core-columns-is-layout-89c98654 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<h2 class=\"wp-block-heading\">O projektu<\/h2>\n\n\n<p class=\"wp-block-paragraph\">Vodovodni sistemi izgubijo velik del vode zaradi pu\u0161\u010danja zakopanih cevi, ve\u010dina teh mest pa je na povr\u0161ini nevidnih, dokler okvara ne postane velika. Akusti\u010dni senzorji, merjenje tlaka in georadar pu\u0161\u010danje zanesljivo najdejo, vendar le na kratkih odsekih, zato niso primerni za pregled celotnega mesta.<\/p>\n\n\n<p class=\"wp-block-paragraph\">Satelitski radar SAR snema ne glede na vreme in dnevno svetlobo ter naenkrat pokrije celotno omre\u017eje. V pasu L je signal ob\u010dutljiv na spremembo dielektri\u010dnosti tal blizu povr\u0161ine, ki jo povzro\u010di voda, ki izteka iz cevi. Metodo smo preizkusili na vodovodnem omre\u017eju Maribora (Mariborski vodovod), ki obsega okoli 1800 km cevi, s polarimetri\u010dnimi posnetki satelita ALOS-2.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Kako deluje<\/h2>\n\n\n<ol class=\"wp-block-list au-steps\">\n<li><strong>Zajem<\/strong>: satelit ALOS-2 (PALSAR-2) posname obmo\u010dje v pasu L v vseh \u0161tirih polarizacijah (HH, HV, VH, VV); posnetke radiometri\u010dno kalibriramo.<\/li>\n\n\n<li><strong>Filtriranje po modelu UTILIS<\/strong>: iz povratnega sipanja odstranimo prispevke trdnih objektov in hrapavosti povr\u0161ja. Neznane koeficiente modela dolo\u010di Kolmogorov\u2013Arnoldova mre\u017ea (KAN).<\/li>\n\n\n<li><strong>Ve\u010dskalna dvovejna mre\u017ea s pozornostjo<\/strong> zdru\u017ei filtrirano sipanje, elemente koheren\u010dne matrike in polarizacijska razmerja ter izdela karto verjetnosti iztekanja.<\/li>\n\n\n<li><strong>Primerjava s klasi\u010dnimi modeli<\/strong> vla\u017enosti tal (Oh, Dubois, IEM, Freeman\u2013Durden): ti vla\u017enost ocenijo, mest iztekanja pa ne locirajo.<\/li>\n<\/ol>\n\n\n<p class=\"wp-block-paragraph\">Rezultat je predizbor sumljivih odsekov omre\u017eja, na katerih vodovodno podjetje nato ciljno i\u0161\u010de okvare na terenu.<\/p>\n<\/div>\n\n\n<div class=\"wp-block-column au-facts is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:40%\">\n<figure class=\"wp-block-table au-facts__table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Vrsta<\/td><td>Raziskovalni projekt<\/td><\/tr><tr><td>Financer<\/td><td>ESA (Evropska vesoljska agencija)<\/td><\/tr><tr><td>Satelit<\/td><td>ALOS-2 PALSAR-2 (JAXA)<\/td><\/tr><tr><td>Pas<\/td><td>L<\/td><\/tr><tr><td>Polarizacije<\/td><td>HH, HV, VH, VV<\/td><\/tr><tr><td>Obmo\u010dje<\/td><td>Maribor, vodovodno omre\u017eje<\/td><\/tr><tr><td>Metode<\/td><td>Model UTILIS, Kolmogorov\u2013Arnoldove mre\u017ee, ve\u010dskalna mre\u017ea s pozornostjo<\/td><\/tr><tr><td>\u010clanek<\/td><td>A. Hanzi\u0107, D. Gleich, A. Sarja\u0161: <em>Synthetic Aperture Radar Data-Based Leakage Detection from Water Pipeline Networks using Multiscale Dual-Branch Cross-Attention Encoder and Kolmogorov\u2013Arnold Networks<\/em>, oddano v revijo Remote Sensing.<\/td><\/tr><tr><td>Predhodno delo<\/td><td>B. Pongrac, D. Gleich: <em>Regression Neural Network for Soil Moisture Estimation<\/em>, APSAR, 2021.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6aef6149a92be&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6aef6149a92be\" class=\"wp-block-image size-full wp-lightbox-container\"><img decoding=\"async\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"\/losdv\/wp-content\/uploads\/sites\/4\/2026\/10\/sar-maribor.jpg\" alt=\"Slika SAR satelita ALOS-2 nad Mariborom z reko Dravo\"\/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n<\/div>\n\n\n<div class=\"wp-block-group au-projnav is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><a href=\"\/losdv\/projekti\/gpr-metode\/\"><span>\u2190 Prej\u0161nji<\/span>Metode za zaznavanje zakopanih objektov<\/a><\/p>\n\n\n<p class=\"wp-block-paragraph\"><a href=\"\/losdv\/projekti\/kontrola-odlitkov\/\"><span>Naslednji \u2192<\/span>Kontrola aluminijastih odlitkov s kamero<\/a><\/p>\n<\/div>\n<\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>\u2190 Projekti in zaklju\u010dna dela 01.4 \u00b7 Raziskovalni projekt ESA Ocenjevanje iztekanja iz vodovodnega sistema s slikami SAR Iz polarimetri\u010dnih radarskih slik satelita ALOS-2 i\u0161\u010demo mesta, kjer voda izteka iz zakopanih vodovodnih cevi \u2013 za pregled celotnega omre\u017eja naenkrat. Ponazoritev \u00b7 slika SAR ALOS-2 nad Mariborom \u2192 karta verjetnosti iztekanja (omre\u017eje in mesta so ponazorjena)Ustavi [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2098,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"page-brez-naslova","meta":{"footnotes":""},"class_list":["post-2103","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2103","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/comments?post=2103"}],"version-history":[{"count":1,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2103\/revisions"}],"predecessor-version":[{"id":2116,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2103\/revisions\/2116"}],"up":[{"embeddable":true,"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/pages\/2098"}],"wp:attachment":[{"href":"https:\/\/au.feri.um.si\/losdv\/wp-json\/wp\/v2\/media?parent=2103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}