Kusankha choyezera madzi chotseguka choyenera ndikofunikira kwambiri pakuyeza madzi molondola kuyambira ulimi wothirira ndi madzi otayira m'matauni mpaka kasamalidwe ka madzi otayira m'mafakitale. Pakati pa zinthu zomwe zimayikidwa kwambiri ndi makina otayira madzi ndi flume—zonse zimadalira kupanga njira zoyendetsera madzi kuti ziwerengere kuchuluka kwa madzi, koma kapangidwe kake, magwiridwe antchito, ndi kuyenerera kwake zimasiyana kwambiri. Kusankha pakati pawo kumafuna kuganizira mosamala zinthu monga mtundu wa madzi, kukula kwa njira, zosowa zosamalira, ndi zofunikira zolondola. Bukuli likulongosola zinthu zofunika kwambiri kuti zithandize mainjiniya ndi ogwira ntchito kupanga chisankho chodziwa bwino.
1. Makhalidwe a Madzi: Kusamalira Zolimba, Zinyalala, ndi Zowononga
Mtundu wa madzi omwe akuyesedwa ndi chinthu choyamba komanso chofunikira kwambiri. Mawero ndi ma flume amayankha mosiyana kwambiri ndi zinthu zolimba, zinyalala, ndi zinthu zowononga, zomwe zingakhudze kulondola komanso moyo wautali.
Mawero ndi nyumba zosavuta: chotchinga choyima chokhala ndi malo otseguka (monga V-notch, rectangle, kapena trapezoidal) chomwe chimakakamiza madzi kuti ayende pamwamba pa chivundikirocho. Ngakhale kuti amagwira ntchito bwino pamadzi oyera kapena ovunda pang'ono (monga madzi amvula otuluka kapena madzi otayidwa), amavutika ndi madzi okhala ndi zinthu zolimba kwambiri, matope, kapena zinyalala. Zinthu zolimba nthawi zambiri zimakhazikika pamwamba pa chivundikirocho, zomwe zimasintha mawonekedwe a madzi ndikupangitsa kuti zisayesedwe bwino. M'mafakitale okhala ndi tinthu tambiri (monga madzi otayidwa okonzedwa ndi zinthu zachilengedwe), kuyeretsa pafupipafupi kumafunika kuti kupewe kutsekeka—kuwonjezera ndalama zogwirira ntchito komanso nthawi yopuma.
Mosiyana ndi zimenezi, ma flume ndi njira zapadera (monga Parshall, Palmer-Bowlus, kapena Trapezoidal) zomwe zimachepetsera madzi kuti pakhale kusiyana kwa madzi. Kapangidwe kake kosalala kamachepetsa kuchuluka kwa matope: kuyenda mofulumira kudzera mu matope kumalepheretsa zinthu zolimba kuti zisakhazikike, zomwe zimapangitsa kuti zikhale zabwino kwambiri pamadzi odetsedwa monga madzi otayira m'minda (okhala ndi tinthu ta dothi) kapena migodi ya zinyalala (yokhala ndi mchenga). Ma flume amathanso kuthana ndi madzi owononga bwino, chifukwa amatha kupangidwa kuchokera ku zipangizo monga fiberglass, PVC, kapena konkire—osakhudzidwa ndi mankhwala m'madzi otayidwa m'mafakitale. Mwachitsanzo, flume ya Parshall yomwe imayikidwa mu ngalande yamkuntho ya boma imayesa bwino madzi ngakhale mvula yamphamvu, pamene zinyalala (masamba, zinyalala) zili zambiri, popanda kukonzedwa pafupipafupi.
2. Kukula kwa Channel ndi Flow Range
Mawero ndi ma flume amapangidwira miyeso yeniyeni ya njira ndi kuchuluka kwa madzi, kotero kufananiza dongosolo ndi magawo a dongosolo lanu ndikofunikira.
Mawero amagwira ntchito bwino m'njira zazing'ono mpaka zapakati zomwe zimakhala ndi madzi ochepa mpaka apakati. Kulondola kwawo kumadalira kusunga madzi "osafunikira" (madzi oyenda pang'onopang'ono, okhazikika) m'mwamba, zomwe zimafuna kutalika kokwanira kwa njira zisanafike dzenje (nthawi zambiri nthawi 10-20 kuposa kuya kwakukulu kwa madzi). Pa njira zazikulu kwambiri (monga ngalande zothirira) kapena madzi oyenda kwambiri, mawero amakhala osagwira ntchito: amafuna zotchinga zazitali komanso magawo ataliatali a m'mwamba, zomwe zimawonjezera ndalama zoyikira. Mwachitsanzo, mawero a V-notch ndi abwino kwambiri poyesa madzi otsika (osakwana malita 0.1 pa sekondi) m'njira zopapatiza koma amalephera kuthana ndi kukwera kwa madzi m'makina akuluakulu.
Ma Flume ndi osinthasintha kwambiri pa kukula kwa njira ndi mayendedwe. Ma Flume a Parshall, omwe ndi ofala kwambiri, amapezeka m'makulidwe kuyambira mainchesi awiri (pa mapaipi ang'onoang'ono) mpaka mamita 15 (pa ngalande zazikulu), zomwe zimapangitsa kuti azigwiritsidwa ntchito pakuyenda kwa madzi pang'ono komanso kwakukulu. Kapangidwe kawo kakang'ono kamafuna malo ochepa kumtunda (nthawi zambiri kuwirikiza ka 5-10 kuposa kuya kwa madzi) kuposa ma weirs, zomwe zimasunga malo m'malo okhazikika monga mafakitale kapena makina otulutsira madzi m'mizinda. Mwachitsanzo, flume yaying'ono ya Palmer-Bowlus imalowa mosavuta mu chitoliro cha mainchesi 1.5 kuti iyeze kuyenda kwa madzi otayira, pomwe flume yayikulu ya Trapezoidal imagwira ntchito yothirira madzi ambiri m'ngalande zazikulu zaulimi. Ma Flume amagwiranso ntchito bwino ndi kuyenda kosakhazikika (monga kukwera kwa madzi mwadzidzidzi), chifukwa kapangidwe kake ka kukanikiza kamapangitsa kuti kayendedwe ka madzi kakhale kolimba kuposa ma weirs.
3. Zofunikira pa Kukhazikitsa ndi Kukonza
Kuvuta kwa kukhazikitsa ndi kukonza kwa nthawi yayitali kungakhudze kwambiri ndalama zogwirira ntchito, zomwe zimapangitsa izi kukhala chinthu chofunikira kwambiri popanga zisankho.
Mawero otchingira ndi osavuta kuyika m'njira zomwe zilipo kale: amatha kupangidwa ndi konkire, chitsulo, kapena pulasitiki ndikuyikidwa m'malo mwake. Komabe, kulondola kwawo kumakhala koyenera kwambiri pakugwirizana bwino—ngakhale kupendekeka pang'ono kumatha kusokoneza kayendedwe ka madzi pamwamba pa chivundikirocho, zomwe zimapangitsa kuti pakhale zolakwika. Kuphatikiza apo, monga tafotokozera, mawero otchingira amafunika kutsukidwa pafupipafupi kuti achotse zinthu zolimba, makamaka m'malo ogwiritsidwa ntchito ndi madzi odetsedwa. M'malo ozizira, mawero otchingira nawonso amatha kusonkhanitsa ayezi pa chivundikirocho, zomwe zimasokoneza kuyeza ndipo zingafunike njira zochotsera icing.
Ma Flume ali ndi zofunikira kwambiri pakukhazikitsa koma zosowa zochepa pakukonza. Kugwira ntchito kwawo kumadalira kukula kolondola (monga kutsetsereka, m'lifupi mwa pakhosi) komanso kugwirizana bwino ndi ngalande—kukhazikitsa kosakwanira kungayambitse kulekana kwa madzi ndi zolakwika. Komabe, akayikidwa bwino, ma flume amafunika kusamaliridwa pang'ono: kapangidwe kawo kodziyeretsa kamachepetsa kusonkhana kwa matope, ndipo sakhala pachiwopsezo chachikulu cha kuwonongeka ndi ayezi (kuyenda kocheperako kumabweretsa chisokonezo chomwe chimaletsa kuzizira). Kumalo akutali (monga ngalande zothirira madzi akumidzi) komwe kukonza pafupipafupi sikungatheke, ma flume nthawi zambiri amakhala chisankho chabwino. Ngakhale kuti ndalama zoyambira zokhazikitsa zitha kukhala zokwera (makamaka ma flume akuluakulu), ndalama zomwe zimasungidwa nthawi yayitali pantchito ndi kukonza nthawi zambiri zimathetsa izi.
4. Kulondola ndi Kutsatira Malamulo
Pa ntchito zomwe zimafuna kutsatira malamulo okhudza chilengedwe (monga malire otulutsira madzi otayira) kapena kasamalidwe kolondola ka zinthu (monga kugawa madzi mu ulimi), kulondola sikungakambiranedwe.
Mawerowa amapereka kulondola kwakukulu (±2–5%) m'malo abwino: madzi oyera, kuyenda bwino, komanso mikhalidwe yoyenera ya m'mphepete mwa nyanja. Komabe, kulondola kwawo kumachepa msanga m'zochitika zenizeni—kuchuluka kwa zinyalala, kuyenda kosagwirizana, kapena zinyalala zimatha kuwonjezera zolakwika kufika ±10% kapena kuposerapo. Izi zimapangitsa kuti zisagwiritsidwe ntchito bwino m'mafakitale olamulidwa komwe kumafunika kulondola kwambiri poyeza.
Ma flume, akayikidwa bwino, amakhala olondola kwambiri (± 1–3%) m'malo osiyanasiyana. Kapangidwe kake kamachepetsa kusokonezeka kwa madzi, ndipo kufupika kwake kumatsimikizira ubale wokhazikika pakati pa kuchuluka kwa madzi ndi kuchuluka kwa madzi—ngakhale ndi kusiyana pang'ono m'malo okwera. Kudalirika kumeneku kumapangitsa ma flume kukhala chisankho chabwino kwambiri pakutsata malamulo, monga kupereka malipoti okhudza kutayidwa kwa madzi otayidwa m'mafakitale ku mabungwe azachilengedwe kapena kuyang'anira ufulu wa madzi m'madera aulimi.
Mapeto
Kusankha pakati pa malo osungira madzi ndi flume kumadalira kuyanjanitsa makhalidwe a madzi, kukula kwa njira, kuthekera kokonza, ndi zosowa zolondola. Malo osungira madzi ndi otsika mtengo pamakina ang'onoang'ono, oyera okhala ndi madzi oyenda bwino koma amakumana ndi zinyalala ndi zinthu zolimba kwambiri. Ma flume, ngakhale nthawi zambiri amakhala okwera mtengo kuyika, amagwira bwino ntchito zamadzimadzi akuda, njira zazikulu, ndi ntchito zomwe zimafuna kudalirika kwa nthawi yayitali komanso kutsatira malamulo. Poyesa zinthu izi, ogwiritsa ntchito amatha kusankha makina otsegulira njira omwe amapereka muyeso wolondola komanso wotsika mtengo wogwirizana ndi zosowa zawo zenizeni - kuonetsetsa kuti kayendetsedwe ka zinthu ndi magwiridwe antchito ndi bwino.
Nthawi yotumizira: Okutobala-28-2025