Trash rack

A trash rack (US) or debris screen is a wooden or metal structure, frequently supported by masonry, that prevents water-borne debris (such as logs, boats, animals, masses of cut waterweed, etc.) from entering the intake of a water mill, pumping station or water conveyance. This protects water wheels, penstocks, and sluice gates from destruction during floods. They are sometimes fitted to storm drain inflows and outflows to prevent debris from entering a natural watercourse. Other names used as trash screen (US) or debris grille.^[1]

Trash racks composed of vertical wooden strakes separated by narrow gaps are very common and perform extremely poorly. Metal gratings are sturdier and can have narrower strakes, and angling the trash rack properly can allow some self-cleaning from the action of the water. Modern trash racks as used by hydroelectric plants can incorporate such advanced features as wedge-wire screens, the Coanda effect, and cleaning robots.

In waterways with large amounts of floating debris, various permanently installed "trash rakes" may be required to reduce the labor required for regular cleaning.

Trash racks are designed for water velocity of around 2 feet/second (0.6 metres/second) to prevent excessive energy loss due to the head loss across the trash rack.^[2] Close spacing keeps out more small floating debris or fish, but may plug up easily with frazil ice in cold climates. ^[3]

References

^ Blanc, Janice (2013). An analysis of the impact of trash screen design on debris related blockage at culvert inlets. Heriot-Watt University. Dissertation.
^ Karassik, Igor J. et al., eds.; Pump Handbook (3rd Edition), McGraw-Hill 2001 ISBN 978-0-07-034032-9 page 10-5
^ U.S. Army Corps of Engineers, Ice Engineering - Engineering and Design (EM 1110-2-1612) ISBN 978-1-61583-638-3 page 20-11

This industry-related article is a stub. You can help Wikipedia by expanding it.

Read other articles:

Bato, Catanduanes

Untuk pengertian lain, lihat Bato. Bato adalah munisipalitas kelas 5 di Catanduanes, Filipina. Menurut sensus tahun 2007, Bato berpenduduk 18.738 jiwa atau 3.497 rumah tangga.[1] Geografi Pembagian wilayah Secara politis Bato terbagi atas 27 barangay, yaitu:[2] Barangay Penduduk(2007) Aroyao Pequeño 167 Bagumbayan 369 Banawang 553 Batalay 1,168 Binanwahan 1,707 Bote 1,100 Buenavista 380 Cabugao 2,888 Cagraray 534 Carorian 441 Guinobatan 908 Libjo 374 Marinawa 451 Mintay 393 ...

Bandar Udara Baucau

Bandara BaucauIATA: BCHICAO: WPECInformasiJenisPublik/ MiliterPemilikTimor LestePengelolaPT Angkasa Pura I InternasionalMelayaniBaucau, Timor LesteKetinggian dpl542 mdplKoordinat08°29′07″S 126°23′57″E / 8.48528°S 126.39917°E / -8.48528; 126.39917Koordinat: 08°29′07″S 126°23′57″E / 8.48528°S 126.39917°E / -8.48528; 126.39917Landasan pacu Arah Panjang Permukaan m kaki 14/32 2,509 8,233 Bitumen Sumber: AIP Timor-Le...

Immigration illégale

Ne doit pas être confondu avec Émigration illégale. Un fort différentiel économique explique en partie l'immigration clandestine. Ici le mur de Nogales qui sépare à gauche les États-Unis et à droite le Mexique. L'immigration clandestine, l'immigration illégale, ou parfois immigration irrégulière est l'entrée illégale, illicite, ou discrète sur un territoire national d'étrangers n'ayant pas réalisé les formalités attendues. Cette immigration est considérée comme illégiti...

Ernest Vallé

Ernest ValléFonctionsSénateur de la Troisième RépubliqueMarne20 novembre 1898 - 24 janvier 1920Député françaisSeptième législature de la Troisième République françaiseMarne1er juin - 6 décembre 1898Député françaisSixième législature de la Troisième République françaiseMarne15 octobre 1893 - 31 mai 1898Député françaisCinquième législature de la Troisième République françaiseMarne12 novembre 1889 - 14 octobre 1893BiographieNaissance 19 septembre 1845AvizeDécès 24 ...

Julio César Chávez

Nama ini menggunakan cara penamaan Spanyol: nama keluarga pertama atau paternalnya adalah Chávez dan nama keluarga kedua atau maternalnya adalah González. Julio César ChávezChávez pada 2017StatistikNama asliJulio César Chávez GonzálezNama panggilan J.C. Superstar El César del Boxeo (The Caesar of Boxing)[1] El Gran Campeón Mexicano (The Great Mexican Champion)[2] Mr. KO El León de Culiacán (The Lion of Culiacán) Dinilai pada Super featherweight Lightweight Li...

Teenage Love (song)

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Teenage Love song – news · newspapers · books · scholar · JSTOR (October 2021) (Learn how and when to remove this template message) 1988 single by Slick RickTeenage LoveSingle by Slick Rickfrom the album The Great Adventures of Slick Rick B-sideTreat Her L...

Mahimal

Bengali Muslim community of inland in Bangladesh Islam in Bangladesh History Muslim conquest Islamic rule Bengal Sultanate Bengal Subah Anjuman-i-Ulama-i-Bangala Culture Architecture Bangladeshi Bengali Indo-Islamic Indo-Saracenic Mughal Literature Arabic Bengali Dobhashi Jangnama Kissa Marsiya Puthi Persian Urdu Music Ghazal Hamd Nashid Naat Qawwali Zari Zikir Major figures Bakhtiyar Khalji Shah Jalal Khan Jahan Ali Shah Makhdum Titumir Shariatullah Karamat Ali Jaunpuri Sher-e-Bangla Siraji ...

Rally-X

Rally-X Lembaran promosional, yang mjenampilkan kabin-kabin arkade yang menggunakan judul tersebutPublikasi 1980 GenreMaze, MengemudiBagian dariNamco Museum Virtual Arcade Karakteristik teknisPlatformpermainan arkade, MSX, iOS, PlayStation 4 dan Nintendo Switch ModePermainan video pemain tunggal Metode inputtuas kendali Format kode Daftar 30 Informasi pengembangPengembangNamcoPenyuntingNamco KomponisNobuyuki OhnogiPenerbitPenilaianESRB Informasi tambahanMobyGamesrally-x Bagian dari Portal per...

大字 (数字)

この項目には、一部のコンピュータや閲覧ソフトで表示できない文字が含まれています（詳細）。数字の大字（だいじ）は、漢数字の一種。通常用いる単純な字形の漢数字（小字）の代わりに同じ音の別の漢字を用いるものである。概要壱万円日本銀行券（「壱」が大字）弐千円日本銀行券（「弐」が大字）漢数字には「一」「二」「三」と続く小字と、「壱」「�...

Cobb Vanth

Star Wars character Fictional character Cobb VanthThe MarshalStar Wars characterTimothy Olyphant as Cobb Vanth in a scene from the second season of The MandalorianFirst appearanceAftermath (2015)Created byChuck WendigAdapted byJon FavreauDave FiloniPortrayed byTimothy OlyphantVoiced byMarc ThompsonIn-universe informationFull nameCobb VanthAliasCobb VanceSpeciesHumanGenderMaleTitleThe Marshal of Freetown (formerly the Sheriff of Mos Pelgo)OccupationMarshal / sheriff; former slaveAffiliationMos...

Spike (Elvis Costello album)

1989 studio album by Elvis CostelloSpikeStudio album by Elvis CostelloReleased6 February 1989Recorded1987–1988Studio Ocean Way (Hollywood) Southland (New Orleans) Windmill Lane (Dublin) AIR (London) Genre Rock baroque pop[1] Length63:50LabelWarner Bros.Producer Elvis Costello Kevin Killen T-Bone Burnett Elvis Costello chronology Out of Our Idiot(1987) Spike(1989) Mighty Like a Rose(1991) Singles from Spike VeronicaReleased: February 1989 Baby Plays AroundReleased: May 1989 ...

Lionel Naccache

Pour les articles homonymes, voir Naccache. Lionel NaccacheLionel Naccache en janvier 2014.BiographieNaissance 27 mars 1969 (55 ans)SarcellesNationalité françaiseFormation École normale supérieure (à partir de 1988)Université Paris-Descartes (doctorat) (jusqu'en 1998)Université Pierre-et-Marie-Curie (doctorat) (jusqu'en 2002)Activités Professeur des universités-praticien hospitalier ou professeure des universités-praticienne hospitalière (depuis 2010), neurologue, chercheurEn...

روجيليو فونيس موري

روجيليو فونيس موري معلومات شخصية الاسم الكامل روجيليو غابرييل فونيس موري الميلاد 5 مارس 1991 (العمر 33 سنة)ميندوزا، الأرجنتين الطول 1.85 م (6 قدم 1 بوصة) مركز اللعب مهاجم الجنسية الأرجنتين المكسيك أخوة وأخوات راميرو فونيس موري معلومات النادي النادي الحالي مونتيري ...

Mustafa Selaniki

16th century Ottoman scholar and chronicler Mustafa Selaniki (Turkish: Selanıkî Mustafa; Mustafa of Salonica; died c. 1600), also known as Selanıkî Mustafa Efendi, was an Ottoman scholar and chronicler, whose Tarih-i Selâniki described the Ottoman Empire of 1563–1599.[1] He was a secretary of the Imperial Divan but his Tarih was not servile and included criticisms of the sultans directly. The Tarih-i Selâniki is considered one of the most individualistic accounts of 16th centu...

Tập tin:Văn Chung.jpeg

Miêu tả Mô tả tập tin phương tiện không tự do và việc sử dụng một cách hợp lý trong Văn Chung (kịch sĩ) Mô tả Ảnh chụp hoặc hình của Văn Chung (kịch sĩ) (1928 – 2018) Nguồn https://nld.mediacdn.vn/2018/1/25/img2543-15168436551531275403933.jpg Bài viết Văn Chung (kịch sĩ) Phần được sử dụng Một hình ảnh nhỏ hoặc trích xuất vừa đủ cho mục đích sử dụng chứ không dư thừa. Độ phân giải th�...

Thank God You're Here

Australian improvised comedy television program This article is about the original Australian version. For the American version, see Thank God You're Here (American TV series). For the British version, see Thank God You're Here (British TV series). For the Indonesian version, see id:Akhirnya Datang Juga. Thank God You're HereLogo for the 2006–2009 seriesCreated byWorking Dog ProductionsPresented byShane Bourne (2006–2009) Celia Pacquola (2023–)JudgesTom Gleisner (2006–2009)Opening the...

United Nations Partition Plan for Palestine

1947 plan to divide British Palestine Partition of Palestine redirects here. For the partition of Palestine into Israel, the Gaza Strip, and the West Bank, see 1949 Armistice Agreements. United Nations resolution adopted in 1947 UN General AssemblyResolution 181 (II)UNSCOP (3 September 1947; see green line) and UN Ad Hoc Committee (25 November 1947) partition plans. The UN Ad Hoc Committee proposal was voted on in the resolution.Date29 November 1947Meeting no.128CodeA/RES/181(II) (Docume...

Épîtres de Jean

Cet article est une ébauche concernant le christianisme. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants. Harleianus 5537 (première page des épitres de Jean) Les épitres de Jean sont des textes anonymes rédigés à la fin du Ier siècle, attribués à l'apôtre Jean et qui font partie du Nouveau Testament. On distingue trois épîtres différentes : Première épître de Jean Deuxième épître de ...

Joan Higginbotham

Joan E. HigginbothamHigginbotham pada September 2003Lahir3 Agustus 1964 (umur 60)Chicago, Illinois, ASStatusPensiunKebangsaanAmerika SerikatPekerjaanInsinyurKarier luar angkasaAntariksawati NASAMisiSTS-116Lambang misi Joan Elizabeth Higginbotham (lahir 3 Agustus 1964) adalah seorang insinyur Amerika Serikat dan mantan antariksawati NASA. Ia ikut dalam misi pesawat ulang alik Discovery STS-116 sebagai spesialis misi[1] dan merupakan wanita Afrika Amerika ketiga yang pergi ke luar...

Upper Germanic-Rhaetian Limes

UNESCO World Heritage Site in Germany Upper German-Raetian LimesUNESCO World Heritage SiteMap of the Upper Germanic-Rhaetian LimesLocationGermanyPart ofFrontiers of the Roman EmpireCriteriaCultural: (ii)(iii)(iv)Reference430terInscription1987 (11th Session)Extensions2005, 2008Websitewww.limesstrasse.de The wooden watchtower reconstructed in 2008 and based on the work of Dietwulf Baatz The Upper Germanic-Rhaetian Limes (‹See Tfd›German: Obergermanisch-Raetischer Limes), or ORL, is a 5...