Ukukhetha imitha yokugeleza kwesiteshi esivulekile efanele kubalulekile ekulinganisweni kwamanzi okunembile ezisetshenziswayo kusukela ekuniseleni kwezolimo kanye nokuthuthwa kwamanzi kamasipala kuya ekuphathweni kwamanzi angcolile ezimbonini. Phakathi kwezilungiselelo ezivame kakhulu kukhona izinhlelo ze-weir kanye ne-flume—zombili zithembele ekudaleni izimo zokugeleza ezilawulwayo ukuze kubalwe ivolumu, kodwa ukwakheka kwazo, ukusebenza kwazo, kanye nokufaneleka kwazo kuyahlukahluka kakhulu. Ukukhetha phakathi kwazo kudinga ukucatshangelwa ngokucophelela izici ezifana nohlobo loketshezi, usayizi wesiteshi, izidingo zokugcinwa, kanye nezidingo zokunemba. Lo mhlahlandlela uhlukanisa izici ezibalulekile ukusiza onjiniyela kanye nabaqhubi ukuthi benze isinqumo esinolwazi.
1. Izici Zoketshezi: Ukuphatha Izinto Eziqinile, Udoti, kanye Nokugqwala
Uhlobo loketshezi olulinganiswayo luyisici sokuqala nesibaluleke kakhulu. Ama-Weirs nama-flume asabela ngendlela ehlukile ezintweni eziqinile, imfucumfucu, nezinto ezibolayo, ezingathinta kokubili ukunemba kanye nokuphila isikhathi eside.
Ama-Weirs ayizakhiwo ezilula: isithiyo esiqondile esinomgodi onamachashazi (isb., i-V-notch, unxande, noma i-trapezoidal) ephoqa amanzi ukuba ageleze phezu kwe-notch. Nakuba esebenza kahle emanzini ahlanzekile noma angcolile kancane (njengokugeleza kwamanzi emvula noma amanzi angcolile alungisiwe), alwa noketshezi oluqukethe amazinga aphezulu ezinto eziqinile ezilengayo, udaka, noma udoti. Izinto eziqinile zivame ukuhlala phezulu kwe-weir, zishintshe iphrofayili yokugeleza futhi zibangele ukungalinganiswa kahle. Ezindaweni zezimboni ezinezinhlayiya ezisindayo (isb., amanzi angcolile okucubungula ukudla anezinto eziphilayo), ukuhlanza njalo kuyadingeka ukuvimbela ukuvinjelwa—ukwengeza izindleko zabasebenzi kanye nesikhathi sokungasebenzi.
Ama-flume, ngokuphambene, ayiziteshi ezibunjwe ngokukhethekile (isib. i-Parshall, i-Palmer-Bowlus, noma i-Trapezoidal) ezinciphisa ukugeleza ukuze kudalwe umehluko olinganisekayo ezingeni lamanzi. Ukwakheka kwawo okuhlelekile kunciphisa ukwakheka kwenhlabathi: ukugeleza okusheshayo phakathi kokuncishiswa kuvimbela izinto eziqinile ukuthi zingahlali, okwenza zibe zilungele uketshezi olungcolile njengokugeleza kwezolimo (ngezinhlayiya zomhlabathi) noma ukumba ukungcola (nge-grit). Ama-flume aphatha noketshezi olubolayo kangcono, njengoba lungakhiwa ngezinto ezifana ne-fiberglass, i-PVC, noma ukhonkolo—omelana namakhemikhali emanzini angcolile ezimboni. Isibonelo, i-flume ye-Parshall efakwe emgodini wesiphepho sikamasipala ilinganisa kahle ukugeleza ngisho nangesikhathi sezimvula ezinkulu, lapho imfucumfucu (amaqabunga, udoti) igcwele, ngaphandle kokulungiswa njalo.
2. Usayizi Wesiteshi kanye Nobubanzi Bezinga Lokugeleza
Ama-Weirs nama-flume aklanyelwe ubukhulu besiteshi esithile kanye namazinga okugeleza, ngakho-ke ukufanisa ukusethwa namapharamitha esistimu yakho kubalulekile.
Ama-Weirs asebenza kahle kakhulu eziteshini ezincane kuya kweziphakathi ezinezinga lokugeleza eliphansi kuya kweliphakathi. Ukunemba kwawo kuncike ekugcineni ukugeleza "okungaphansi kwe-subcritical" (ukugeleza okuhamba kancane, okuzinzile) phezulu komfula, okudinga ubude besiteshi obanele ngaphambi kwe-weir (ngokuvamile izikhathi eziyi-10-20 ukujula kwamanzi okuphezulu). Eziteshini ezinkulu kakhulu (isb., imisele yokunisela ebanzi) noma amazinga okugeleza aphezulu, ama-weirs aba angasebenzi: adinga izithiyo ezinde nezingxenye ezinde eziphezulu komfula, okwandisa izindleko zokufaka. Ama-weirs ane-V-notch, isibonelo, ahle kakhulu ekulinganiseni ukugeleza okuphansi (okuncane njenge-0.1 litres ngomzuzwana) eziteshini ezincane kodwa ahluleka ukusingatha ukukhuphuka kwezinhlelo ezinkulu.
Ama-Flume aguquguquka kakhulu kuzo zonke iziteshi kanye nezindawo zokugeleza. Ama-Flume e-Parshall, uhlobo oluvame kakhulu, atholakala ngobukhulu obusukela kumasentimitha angu-2 (kumapayipi amancane) kuya kumamitha angu-50 (emiseleni emikhulu), okwenza afaneleke kokubili amazinga okugeleza aphansi naphezulu. Umklamo wawo omncane udinga isikhala esincane phezulu komfula (ngokuvamile ukujula kwamanzi okuphindwe ka-5-10) kunemisele, okusindisa isikhala ezindaweni eziqinile njengezikhungo zezimboni noma izinhlelo zokukhipha amanzi emadolobheni. Isibonelo, i-flume encane ye-Palmer-Bowlus ingena kalula epayipini elingu-6 intshi ububanzi ukukala ukugeleza kwamanzi angcolile, kuyilapho i-flume enkulu ye-Trapezoidal iphatha ukunisela okuphezulu emiseleni emikhulu yezolimo. Ama-Flume asebenza kangcono nangokugeleza okungazinzile (isb., ukuqhuma kwamanzi emvula okungazelelwe), njengoba ukwakheka kwawo kokuncishiswa kuzinzisa amaphethini okugeleza ngempumelelo kakhulu kunemisele.
3. Izidingo Zokufaka Nokulungisa
Ubunzima bokufakwa kanye nokugcinwa kwesikhathi eside kungathinta kakhulu izindleko zokusebenza, okwenza lokhu kube yinto ebalulekile ekwenzeni izinqumo.
Ama-Weir kulula ukuwafaka eziteshini ezikhona: angakhiwa ngokhonkolo, insimbi, noma ipulasitiki bese efakwa ngamabholidi noma athululelwe endaweni yawo. Kodwa-ke, ukunemba kwawo kuzwela kakhulu ekuqondeni okufanele—ngisho nokuthambekela okuncane kungaphazamisa ukugeleza phezu kwe-notch, okuholela emaphutheni. Ngaphezu kwalokho, njengoba kushiwo, ama-weir adinga ukuhlanzwa njalo ukuze kususwe izinto eziqinile ezizinzile, ikakhulukazi ekusetshenzisweni koketshezi olungcolile. Ezimweni ezibandayo, ama-weir nawo athambekele ekuqongeleleni kweqhwa ku-notch, okuphazamisa ukulinganisa futhi kungadinga izinhlelo zokususa i-icing.
Ama-flume anezidingo eziqinile zokufakwa kodwa izidingo zokugcinwa ziphansi. Ukusebenza kwawo kuncike ngobukhulu obuqondile (isb., ukuthambeka, ububanzi bomphimbo) kanye nokuhambisana kahle nomsele—ukufakwa kabi kungabangela ukuhlukana kokugeleza kanye nokungalungi. Kodwa-ke, uma efakwe kahle, ama-flume adinga ukunakekelwa okuncane: ukwakheka kwawo kokuzihlanza kunciphisa ukwakheka kwenhlabathi, futhi awathinteki kalula ekulimaleni kweqhwa (ukugeleza okunciphile kudala ukuphazamiseka okumelana nokubanda). Ezindaweni ezikude (isb., imisele yokunisela yasemakhaya) lapho ukulungiswa okuvamile kungenzeki khona, ama-flume avame ukuba yisinqumo esingcono. Ngenkathi izindleko zokuqala zokufaka zingase zibe phezulu (ikakhulukazi kuma-flume asayizi angokwezifiso), ukonga kwesikhathi eside emsebenzini nasekulungiseni kuvame ukuqeda lokhu.
4. Ukunemba Nokuhambisana Nemithetho
Ezicelweni ezidinga ukuthobela imithethonqubo yezemvelo (isb., imikhawulo yokukhishwa kwamanzi amdaka) noma ukuphathwa kwezinsiza okunembile (isb., ukwabiwa kwamanzi kwezolimo), ukunemba akunakuxoxiswana ngakho.
Ama-Weirs anikeza ukunemba okuphezulu (±2–5%) ezimweni ezifanele: amanzi ahlanzekile, ukugeleza okuzinzile, kanye nezimo ezifanele zomfula. Kodwa-ke, ukunemba kwawo konakala ngokushesha ezimweni zangempela—ukwakheka kwenhlabathi, ukugeleza okungalingani, noma imfucuza kungandisa amaphutha abe yi-±10% noma ngaphezulu. Lokhu kuwenza angafaneleki kangako ezimbonini ezilawulwayo lapho kudingeka khona ukunemba okuqinile kokulinganisa.
Ama-flume, uma efakwe kahle, agcina ukunemba okuphezulu (±1–3%) kuzo zonke izimo ezibanzi. Ukwakheka kwawo kunciphisa ukuphazamiseka kokugeleza, futhi ukuminyana kuqinisekisa ubudlelwano obuhambisanayo phakathi kwezinga lamanzi kanye nesivinini sokugeleza—ngisho nokwehluka okuncane ezimweni ezingenhla komfula. Lokhu kuthembeka kwenza ama-flume abe yisinqumo esikhethwayo sokuthobela imithetho, njengokubika ukukhishwa kwamanzi angcolile ezimbonini ezinhlanganweni zemvelo noma ukuphatha amalungelo amanzi ezindaweni zezolimo.
Isiphetho
Ukukhetha phakathi kokusethwa kwe-weir kanye ne-flume kuncike ekulinganiseni izici zoketshezi, usayizi wesiteshi, amakhono okulungisa, kanye nezidingo zokunemba. Ama-weir asebenza kahle kakhulu ezinhlelweni zamanzi ezincane, ezihlanzekile ezinokugeleza okuqhubekayo kodwa alwa nokungcola kanye nezinto eziqinile eziphakeme. Ama-Flume, nakuba evame ukubiza kakhulu ukuwafaka, ahamba phambili kuketshezi olungcolile, iziteshi ezinkulu, kanye nezinhlelo zokusebenza ezidinga ukuthembeka kwesikhathi eside kanye nokuhambisana nomthetho. Ngokuhlola lezi zici, abaqhubi bangakhetha ukusethwa kwemitha yokugeleza kwesiteshi esivulekile enikeza isilinganiso esinembile nesingabizi kakhulu sezidingo zabo ezithile—ukuqinisekisa ukuphathwa kwezinsiza kusebenza kahle kanye nempumelelo yokusebenza.
Isikhathi sokuthunyelwe: Okthoba-28-2025