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data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Indice</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">nascondi</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inizio</div> </a> </li> <li id="toc-Caratteristiche" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Caratteristiche"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Caratteristiche</span> </div> </a> <ul id="toc-Caratteristiche-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Note</span> </div> </a> <ul id="toc-Note-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Voci_correlate" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Voci_correlate"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Voci correlate</span> </div> </a> <ul id="toc-Voci_correlate-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Altri_progetti" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Altri_progetti"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Altri progetti</span> </div> </a> <ul id="toc-Altri_progetti-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Collegamenti_esterni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collegamenti_esterni"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Collegamenti esterni</span> </div> </a> <ul id="toc-Collegamenti_esterni-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Indice" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l'indice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l'indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Alveo</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un'altra lingua. Disponibile in 44 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-44" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">44 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%82%D8%A7%D8%B9_%D8%A7%D9%84%D9%85%D8%AC%D8%B1%D9%89" title="قاع المجرى - arabo" lang="ar" hreflang="ar" data-title="قاع المجرى" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%99%D1%8B%D1%80%D2%99%D0%B0" title="Йырҙа - baschiro" lang="ba" hreflang="ba" data-title="Йырҙа" data-language-autonym="Башҡортса" data-language-local-name="baschiro" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-bat-smg mw-list-item"><a href="https://bat-smg.wikipedia.org/wiki/Vaga" title="Vaga - samogitico" lang="sgs" hreflang="sgs" data-title="Vaga" data-language-autonym="Žemaitėška" data-language-local-name="samogitico" class="interlanguage-link-target"><span>Žemaitėška</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A0%D1%8D%D1%87%D1%8B%D1%88%D1%87%D0%B0" title="Рэчышча - bielorusso" lang="be" hreflang="be" data-title="Рэчышча" data-language-autonym="Беларуская" data-language-local-name="bielorusso" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A0%D0%B0%D1%87%D0%BD%D0%BE%D0%B5_%D1%80%D1%8D%D1%87%D1%8B%D1%88%D1%87%D0%B0" title="Рачное рэчышча - Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Рачное рэчышча" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A0%D0%B5%D1%87%D0%BD%D0%BE_%D0%BA%D0%BE%D1%80%D0%B8%D1%82%D0%BE" title="Речно корито - bulgaro" lang="bg" hreflang="bg" data-title="Речно корито" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Naoz" title="Naoz - bretone" lang="br" hreflang="br" data-title="Naoz" data-language-autonym="Brezhoneg" data-language-local-name="bretone" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Llit_fluvial" title="Llit fluvial - catalano" lang="ca" hreflang="ca" data-title="Llit fluvial" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Dno_toku" title="Dno toku - ceco" lang="cs" hreflang="cs" data-title="Dno toku" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%AE%D1%85%D0%BB%C4%83%D1%85" title="Юхлăх - ciuvascio" lang="cv" hreflang="cv" data-title="Юхлăх" data-language-autonym="Чӑвашла" data-language-local-name="ciuvascio" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Gew%C3%A4sserbett" title="Gewässerbett - tedesco" lang="de" hreflang="de" data-title="Gewässerbett" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Stream_bed" title="Stream bed - inglese" lang="en" hreflang="en" data-title="Stream bed" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Fluejo" title="Fluejo - esperanto" lang="eo" hreflang="eo" data-title="Fluejo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Cauce" title="Cauce - spagnolo" lang="es" hreflang="es" data-title="Cauce" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/J%C3%B5es%C3%A4ng" title="Jõesäng - estone" lang="et" hreflang="et" data-title="Jõesäng" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Ibilgu" title="Ibilgu - basco" lang="eu" hreflang="eu" data-title="Ibilgu" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A8%D8%B3%D8%AA%D8%B1_%D8%B1%D9%88%D8%AF%D8%AE%D8%A7%D9%86%D9%87" title="بستر رودخانه - persiano" lang="fa" hreflang="fa" data-title="بستر رودخانه" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Joen_uoma" title="Joen uoma - finlandese" lang="fi" hreflang="fi" data-title="Joen uoma" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Lit_(hydrologie)" title="Lit (hydrologie) - francese" lang="fr" hreflang="fr" data-title="Lit (hydrologie)" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%90%D7%A4%D7%99%D7%A7_(%D7%92%D7%90%D7%95%D7%92%D7%A8%D7%A4%D7%99%D7%94)" title="אפיק (גאוגרפיה) - ebraico" lang="he" hreflang="he" data-title="אפיק (גאוגרפיה)" data-language-autonym="עברית" data-language-local-name="ebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%80%D5%B8%D6%82%D5%B6" title="Հուն - armeno" lang="hy" hreflang="hy" data-title="Հուն" data-language-autonym="Հայերեն" data-language-local-name="armeno" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Dasar_sungai" title="Dasar sungai - indonesiano" lang="id" hreflang="id" data-title="Dasar sungai" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-inh mw-list-item"><a href="https://inh.wikipedia.org/wiki/%D0%A5%D1%8C%D0%BE%D0%B0%D1%80%D1%81%D0%B0%D0%BC" title="Хьоарсам - ingush" lang="inh" hreflang="inh" data-title="Хьоарсам" data-language-autonym="ГӀалгӀай" data-language-local-name="ingush" class="interlanguage-link-target"><span>ГӀалгӀай</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Riverolito" title="Riverolito - ido" lang="io" hreflang="io" data-title="Riverolito" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%B7%9D%E5%BA%95" title="川底 - giapponese" lang="ja" hreflang="ja" data-title="川底" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%99%E1%83%90%E1%83%9A%E1%83%90%E1%83%9E%E1%83%9D%E1%83%A2%E1%83%98" title="კალაპოტი - georgiano" lang="ka" hreflang="ka" data-title="კალაპოტი" data-language-autonym="ქართული" data-language-local-name="georgiano" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D3%A8%D0%B7%D0%B5%D0%BD_%D0%B0%D2%A3%D2%93%D0%B0%D1%80%D1%8B" title="Өзен аңғары - kazako" lang="kk" hreflang="kk" data-title="Өзен аңғары" data-language-autonym="Қазақша" data-language-local-name="kazako" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%95%98%EC%83%81_(%EC%A7%80%EC%A7%88%ED%95%99)" title="하상 (지질학) - coreano" lang="ko" hreflang="ko" data-title="하상 (지질학)" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Up%C4%97s_vaga" title="Upės vaga - lituano" lang="lt" hreflang="lt" data-title="Upės vaga" data-language-autonym="Lietuvių" data-language-local-name="lituano" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Dasar_sungai" title="Dasar sungai - malese" lang="ms" hreflang="ms" data-title="Dasar sungai" data-language-autonym="Bahasa Melayu" data-language-local-name="malese" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Rivierbedding" title="Rivierbedding - olandese" lang="nl" hreflang="nl" data-title="Rivierbedding" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Leito_aqu%C3%A1tico" title="Leito aquático - portoghese" lang="pt" hreflang="pt" data-title="Leito aquático" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Albie" title="Albie - rumeno" lang="ro" hreflang="ro" data-title="Albie" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A0%D0%B5%D1%87%D0%BD%D0%BE%D0%B5_%D1%80%D1%83%D1%81%D0%BB%D0%BE" title="Речное русло - russo" lang="ru" hreflang="ru" data-title="Речное русло" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%A1%D2%AF%D0%BB%D0%B1%D1%8D" title="Сүлбэ - sacha" lang="sah" hreflang="sah" data-title="Сүлбэ" data-language-autonym="Саха тыла" data-language-local-name="sacha" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-se mw-list-item"><a href="https://se.wikipedia.org/wiki/Johkaroggi" title="Johkaroggi - sami del nord" lang="se" hreflang="se" data-title="Johkaroggi" data-language-autonym="Davvisámegiella" data-language-local-name="sami del nord" class="interlanguage-link-target"><span>Davvisámegiella</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Flodb%C3%A4dd" title="Flodbädd - svedese" lang="sv" hreflang="sv" data-title="Flodbädd" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-szy mw-list-item"><a href="https://szy.wikipedia.org/wiki/bukebukelalan" title="bukebukelalan - Sakizaya" lang="szy" hreflang="szy" data-title="bukebukelalan" data-language-autonym="Sakizaya" data-language-local-name="Sakizaya" class="interlanguage-link-target"><span>Sakizaya</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Dere_yata%C4%9F%C4%B1" title="Dere yatağı - turco" lang="tr" hreflang="tr" data-title="Dere yatağı" data-language-autonym="Türkçe" data-language-local-name="turco" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A0%D1%96%D1%87%D0%B8%D1%89%D0%B5" title="Річище - ucraino" lang="uk" hreflang="uk" data-title="Річище" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Daryo_havzasi." title="Daryo havzasi. - uzbeco" lang="uz" hreflang="uz" data-title="Daryo havzasi." data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbeco" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-xmf mw-list-item"><a href="https://xmf.wikipedia.org/wiki/%E1%83%99%E1%83%90%E1%83%9A%E1%83%90%E1%83%9E%E1%83%9D%E1%83%A2%E1%83%98" title="კალაპოტი - mengrelio" lang="xmf" hreflang="xmf" data-title="კალაპოტი" data-language-autonym="მარგალური" data-language-local-name="mengrelio" class="interlanguage-link-target"><span>მარგალური</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%B2%B3%E5%BA%8A" title="河床 - cinese" lang="zh" hreflang="zh" data-title="河床" data-language-autonym="中文" data-language-local-name="cinese" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E6%B2%B3%E7%89%80" title="河牀 - cantonese" lang="yue" hreflang="yue" data-title="河牀" data-language-autonym="粵語" data-language-local-name="cantonese" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1429491#sitelinks-wikipedia" title="Modifica collegamenti interlinguistici" class="wbc-editpage">Modifica collegamenti</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespace"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Alveo" title="Vedi la voce [c]" accesskey="c"><span>Voce</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Discussione:Alveo&action=edit&redlink=1" rel="discussion" class="new" title="Vedi le discussioni relative a questa pagina (la pagina non esiste) [t]" accesskey="t"><span>Discussione</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" 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id="siteSub" class="noprint">Da Wikipedia, l'enciclopedia libera.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r133964453">.mw-parser-output .avviso .mbox-text-div>div,.mw-parser-output .avviso .mbox-text-full-div>div{font-size:90%}.mw-parser-output .avviso .mbox-image{flex-basis:52px;flex-grow:0;flex-shrink:0}.mw-parser-output .avviso .mbox-text-full-div .hide-when-compact{display:block}</style><div style="" class="ambox metadata plainlinks avviso avviso-contenuto"> <div class="avviso-immagine mbox-image noprint"><span typeof="mw:File"><a href="/wiki/File:Question_book-4.svg" class="mw-file-description" title="Niente fonti!"><img alt="Niente fonti!" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/64/Question_book-4.svg/45px-Question_book-4.svg.png" decoding="async" width="45" height="35" 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fonti</a>. </div> </div> </div> </div> </div> <p>In <a href="/wiki/Idrografia" title="Idrografia">idrografia</a> l'<b>alveo</b> (o <b>letto</b>) è quella parte di terreno occupata dalle acque di un <a href="/wiki/Fiume" title="Fiume">corso</a> o da uno <a href="/wiki/Lago" title="Lago">specchio d'acqua</a>. </p><p>L'espressione <i>letto del fiume</i> sembra essere stata usata per la prima volta da <a href="/wiki/Brunetto_Latini" title="Brunetto Latini">Brunetto Latini</a> nella sua opera <i>Li livres dou tresor</i> (detto comunemente <i>Tresor</i>) (seconda metà del Duecento, ~1265). Canale deriva dal latino canalis, in origine aggettivo da canna, a forma di canna quindi.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Caratteristiche">Caratteristiche</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Alveo&veaction=edit&section=1" title="Modifica la sezione Caratteristiche" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Alveo&action=edit&section=1" title="Edit section's source code: Caratteristiche"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Po_a_Saluzzo.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/78/Po_a_Saluzzo.jpg/250px-Po_a_Saluzzo.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/78/Po_a_Saluzzo.jpg/330px-Po_a_Saluzzo.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/78/Po_a_Saluzzo.jpg/500px-Po_a_Saluzzo.jpg 2x" data-file-width="3968" data-file-height="2976" /></a><figcaption>A nord di <a href="/wiki/Saluzzo" title="Saluzzo">Saluzzo</a> (CN) alcuni tratti del Po sono ancora abbastanza integri: non essendo costretto a scorrere fra argini artificiali, il fiume, costeggiato da una vegetazione ripariale lussureggiante, modifica il proprio corso anno dopo anno, secondo una dinamica quasi naturale. </figcaption></figure> <p>Nel caso di un <a href="/wiki/Corso_d%27acqua" class="mw-redirect" title="Corso d'acqua">corso d'acqua</a>, l'alveo è la sede all'interno della quale si verifica lo scorrimento delle acque fluviali. È proprio l'azione erosiva esercitata dalle acque che, agendo sul substrato roccioso, ne determina la progressiva escavazione. </p><p>Per ciascun corso d'acqua è possibile individuare, in sezione trasversale, tre distinti alvei: </p> <ul><li>Letto ordinario (o alveo di piena): costituisce il canale di scorrimento del fiume nei periodi di piena ordinaria, che si ripetono in primavera ed autunno. È chiaramente delimitato lateralmente da sponde, o scarpate, sub-verticali, oltre le quali si individua il piano del letto maggiore, in posizione leggermente soprelevata. Nel letto ordinario sono contenuti materiali grossolani, depositati conseguentemente alle variazioni di corrente, responsabili anche del continuo rimaneggiamento (con conseguente irregolarità) dell'alveo di scorrimento. Risulta scarsa, in virtù dei fenomeni alluvionali di piena, la presenza di vegetazione arborea.</li></ul> <ul><li>Letto di inondazione (o alveo maggiore): è costituito dalla superficie massima inondabile dal fiume nel corso delle alluvioni, è sopraelevato e di dimensioni maggiori rispetto al letto di scorrimento ordinario. Paradossalmente, l'attività umana di prelievo (spesso indiscriminato) del sedimento fluviale, per la produzione di laterizi, può dar luogo ad un abbassamento del livello di scorrimento del letto di inondazione. In questo modo, anche in fase di piena, diviene più difficile per il fiume dar luogo a fenomeni alluvionali. Il letto di inondazione è caratterizzato dalla presenza di sedimenti e materiale grossolano, depositati dalle acque nelle fasi di esondazione.</li></ul> <ul><li>Letto di magra (o canale di scorrimento): rappresenta il canale in cui, nelle fasi di magra, si limita a scorrere la blanda corrente fluviale. Rappresenta la fascia di maggior profondità, e non è costituito da <a href="/wiki/Argine" title="Argine">argini</a> sufficientemente definiti da permetterne immediatamente la distinzione dal canale ordinario, nel quale si forma. In generale, è costituito da un canale di scorrimento che, spesso, tende a dividersi e riunirsi senza soluzione di continuità, in base all'azione di escavazione dei sedimenti del letto ordinario, esercitata dalla corrente di magra.</li></ul> <p>Da un punto di vista morfologico, il letto di inondazione è il più ampio, e al suo interno contiene il letto ordinario il quale, a sua volta, comprende il più piccolo letto di magra. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Strumento_per_estrazione_fango_dall%27alveo_dei_fiumi_1776.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Strumento_per_estrazione_fango_dall%27alveo_dei_fiumi_1776.jpg/250px-Strumento_per_estrazione_fango_dall%27alveo_dei_fiumi_1776.jpg" decoding="async" width="220" height="214" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Strumento_per_estrazione_fango_dall%27alveo_dei_fiumi_1776.jpg/330px-Strumento_per_estrazione_fango_dall%27alveo_dei_fiumi_1776.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Strumento_per_estrazione_fango_dall%27alveo_dei_fiumi_1776.jpg/500px-Strumento_per_estrazione_fango_dall%27alveo_dei_fiumi_1776.jpg 2x" data-file-width="1464" data-file-height="1424" /></a><figcaption>Antico strumento per l'estrazione del fango dall'alveo dei fiumi </figcaption></figure> <p>L'alveo di un fiume può assumere diverse forme a seconda della natura dei territori attraversati e della loro <a href="/w/index.php?title=Pendenza_(geologia)&action=edit&redlink=1" class="new" title="Pendenza (geologia) (la pagina non esiste)">pendenza</a>. In particolare nelle zone dove la pendenza è maggiore i corsi d'acqua possono superare salti di roccia poco <a href="/wiki/Erosione" title="Erosione">erodibile</a> con <a href="/wiki/Cascata" title="Cascata">cascate</a> o <a href="/wiki/Rapide" class="mw-redirect" title="Rapide">rapide</a> oppure approfondire il proprio corso fino a formare <a href="/wiki/Gola_(geografia)" title="Gola (geografia)">gole</a>. In aree pianeggianti o sub-pianeggianti lo scorrimento del fiume dà spesso origine a <a href="/wiki/Meandro" title="Meandro">meandri</a>, <a href="/wiki/Lanca" title="Lanca">lanche</a> o <a href="/wiki/Canali_intrecciati" class="mw-redirect" title="Canali intrecciati">canali intrecciati</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Alveo&veaction=edit&section=2" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Alveo&action=edit&section=2" title="Edit section's source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text"><cite class="citation libro" style="font-style:normal"> Mario Di Fidio, Claudio Gandolfi, <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160128031428/http://www.beic.it/sites/default/files/attachments/La%20lingua%20delle%20acque.pdf"><span style="font-style:italic;">La lingua delle acque</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), Milano, BEIC, 2013, p. 35. <small>URL consultato il 18 gennaio 2016</small> <small>(archiviato dall'<abbr title="http://www.beic.it/sites/default/files/attachments/La%20lingua%20delle%20acque.pdf">url originale</abbr> il 28 gennaio 2016)</small>.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Alveo&veaction=edit&section=3" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Alveo&action=edit&section=3" title="Edit section's source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Zona_iporreica" title="Zona iporreica">Zona iporreica</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Alveo&veaction=edit&section=4" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Alveo&action=edit&section=4" title="Edit section's source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><a href="https://it.wiktionary.org/wiki/alveo" class="extiw" title="wikt:alveo">Wikizionario</a></li> <li class="" title=""><span class="plainlinks" title="commons:Category:Stream beds"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Stream_beds?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://it.wiktionary.org/wiki/" title="Collabora a Wikizionario"><img alt="Collabora a Wikizionario" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/20px-Wiktionary_small.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/40px-Wiktionary_small.svg.png 1.5x" data-file-width="350" data-file-height="350" /></a></span> <a href="https://it.wiktionary.org/wiki/" class="extiw" title="wikt:">Wikizionario</a> contiene il lemma di dizionario «<b><a href="https://it.wiktionary.org/wiki/alveo" class="extiw" title="wikt:alveo">alveo</a></b>»</li> <li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/20px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/40px-Commons-logo.svg.png 1.5x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file su <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Stream_beds?uselang=it">alveo</a></span></b></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Alveo&veaction=edit&section=5" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Alveo&action=edit&section=5" title="Edit section's source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFBritannica.com" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://www.britannica.com/science/streambed"><span style="font-style:italic;">streambed</span></a>, su <span style="font-style:italic;"><a href="/wiki/Enciclopedia_Britannica" title="Enciclopedia Britannica">Enciclopedia Britannica</a></span>, Encyclopædia Britannica, Inc.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q1429491#P1417" title="Modifica su Wikidata"><img alt="Modifica su Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" data-file-width="600" data-file-height="600" /></a></span></li></ul> <style data-mw-deduplicate="TemplateStyles:r140554510">.mw-parser-output .CdA{border:1px solid #aaa;width:100%;margin:auto;font-size:90%;padding:2px}.mw-parser-output .CdA th{background-color:#f2f2f2;font-weight:bold;width:20%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .CdA{border-color:#54595D}html.skin-theme-clientpref-night .mw-parser-output .CdA th{background-color:#202122}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .CdA{border-color:#54595D}html.skin-theme-clientpref-os .mw-parser-output .CdA th{background-color:#202122}}</style><table class="CdA"><tbody><tr><th><a href="/wiki/Aiuto:Controllo_di_autorit%C3%A0" title="Aiuto:Controllo di autorità">Controllo di autorità</a></th><td><a href="/wiki/Gemeinsame_Normdatei" title="Gemeinsame Normdatei">GND</a> <span class="uid">(<span style="font-weight:bolder; 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