Ukukhipha amanzi nge-wellpoint kuyindlela ebalulekile yokulawula amanzi angaphansi komhlaba esetshenziselwa ukwakhiwa kwezinsika ezijulile kanye nemiphumela ye-geotechnical lapho ukwehliswa kwesigaba samanzi kuyadingeka. Le ndlela isebenzisa uchungechunge lwamawell amancane, ngokuvamile angama-50-100mm, afakwa phezulu ukuze akhishwe amanzi angaphansi komhlaba ngesistimu. I-system ye-wellpoint ibandakanya amawell athile axhunyiwe ngama-header pipes kwi-pump unit eyinhloko, idala inethiwekhi efanelekile yokukhipha amanzi ngokuphathelene. Le ndlela ibaluleke kakhulu emisebenzini yokushaya, ekwakhiweni kwamaka, ekwakhiweni kwemigodi, nakwezinhlelo zokubuyisela lapho ukujula kwezimayini kudlula isigaba semvelo samanzi noma lapho ukwehluka kwesiz季kusha kwezincwadi zensiza ezinobungozi emsebenzini. Inqubo yokukhipha amanzi ye-wellpoint ibandakanya ukufaka amawell axhunywe eduze emkhathini wezwe lapho kuqedwe khona, ngokuvamile ukuhamba phakathi kuka-1.5 kuya ku-3 metres kuye ngamathuba okubola kanye nezinga lokuhlunga elidingekayo. Izinhlelo ze-wellpoint ezihlomekileyo zingafinyelela ubujamo bokukhishwa bama-4 kuya ku-6 metres kusukela esigabeni esisodwa, kanti izinhlelo eziningi zika-8 metres zenza kube lula ukukhipha amanzi ezingeni elingakanani. Le ndlela isebenza kahle kakhulu emhlabathini ongasondelene nephakathi osemhlophe ngemuva kwemithombo esemkhathini okungokwemvelo, nakuba imishini ethile nendlela yokusebenza ingashintshwa ukuze ifanele umhlabathi ophakathi. Imishini esetshenziselwa imisebenzi ye-wellpoint ibandakanya amapompo asephakeme, ama-header pipes, ama-unit we-vacuum, nezitsha zokukhipha amanzi, kanye nemishini yokubeka ilivela ukuzokalandela izinga lamanzi angaphansi komhlaba nokuqhuba kwesistimu. Ozakwethu bakhethile izinhlelo ze-wellpoint ngokuya ngohlobo lomhlaba, izici zokuhlunga, ubukhulu bokukhulula obudingekayo, indawo yokumhlophe, isikhathi sephrojekthi, nezidingo zomthetho zokuphathwa kwamanzi angaphansi komhlaba. Izenzo zokukhipha amanzi nge-wellpoint zihlala ziqhakambisa ezindaweni eziningi zokwakha ngaphakathi komkhakha ongu-engineering foundation. Izinhlelo zokuhlobisa, ikakhulukazi phakathi kwezinsika eziyisiqhingi nezinjini, zihlanganiswa ngezinhlelo ze-wellpoint ukuze zigcine izimo zokusebenza ezomile, ikakhulukazi ezindaweni ezinamathuba amancane amaza angaphansi omhlaba. Ukukhululwa kwamagodi ngaphansi kwesigaba samanzi kuzuza ekulawuleni izinga lamanzi ngendlela eqinile evimbela ukujula, izimo ezibuhlungu, nezingozi zokuhamba komhlabathi. Imisebenzi yokubuyisela kanye nokuthuthukiswa komhlaba ivame ukuba nezicelo zokukhipha amanzi ukuze kulungiswe umhlaba, ukugcinwa kwendawo, noma izinyathelo zokucindezela. Izinhlelo ezijulile ze-marine nezamanzi zisebenzisa izinhlelo ze-wellpoint ukuze zilawule imithombo yokucindezela ebuhlungu nasemnqamulweni emidwebeni ethile. Le ndlela ihlanganisa kahle nezinye izindlela zokugcina umhlaba ezifana ne-sheet piling, izindonga ze-diaphragm, kanye namawell ajulile, ixhasa izinhlelo eziphelele zokuphatha amanzi ezindaweni. Ukwakhiwa nokusebenza kwezinhlelo zokukhipha amanzi ze-wellpoint kudinga ubuchwepheshe bokuhlola amanzi, imishini yomhlaba, kanye ne-engineering yokwakha ukuze kuqinisekiswe ukulawula amanzi angaphansi komhlaba kahle ngenkathi kuncishiswa ukudlula, ukumiswa, nezimpempe zemvelo. Ozakwethu bezobuchwepheshe bahlola izimo zomhlaba ezithile naphakathi kwezinhlelo zokuhlola ezisebenza kahle zokuhlola ukufaneleka kokuhamba kwemithombo ye-wellpoint, abantu abafanelekile, kanye nezicelo ezisebenzelayo. Ukuhambisana nemigomo yemvelo mayelana nokuphuma kwamanzi angaphansi komhlaba, ukulawula uthuli, kanye nezidingo zamavoti okufaka amanzi kuyadingeka ukuze kube khona impumelelo yephrojekthi. Ukuhlonishwa kwezinhlelo ze-wellpoint ekulawuleni amanzi angaphansi komhlaba kwenza kube ithuluzi elibalulekile kumagatsha akhiqiza imisebenzi yokwakha okujulile ezimweni ezinzima zokuhlola amanzi.
Izinhlelo zokukhuculula amanzi ezisekelwa kumapunzi (wellpoint) zibalulekile njengezixazululo zokulawula umswakamo wamanzi ezingaphezulu, ezisetshenziswa kakhulu ekwakhiweni nasekuthuthukiseni izisekelo ezijulile lapho ukumba komhlaba kwenzeka ngaphantsi kwezinga lamanzi elNatural. Amawellpoint asebenza njengemishini yokukhipha amanzi ephephile eyanciphisa izinga lamanzi ngaphakathi nangaphandle kwemigudu yokwakha, ivumela izimo eziphephile nezomile zokusebenza kwezisekelo ezifana nokushaywa kwezimpahla, ukufakwa kwezindonga ze-diaphragm, futhi nokumba izikhala. Ngokunciphisa izinga lamanzi njengokwesikhashana, izinhlelo zokukhuculula amanzi ezisekelwa kumapunzi zivumela onjiniyela bezobuchwepheshe ukuthi basebenze ngezimo zomhlaba eziqhafaza futhi ezihambisanayo esikhundleni somhlaba ogcwele, ongenamsebenzi okungenza kube nezinkinga eziyingozi kwezokwakha nezikhathi zephrojekthi. Ukufakwa kwama-wellpoint okujwayelekile kuhlanganisa uchungechunge lwama-wellpoint aphakanyisiwe, noma amapayipi ama-wellpoint, afakwe ngokuqondile emhlabathini ezikhathini ezibalulekile ezijulile emaphethelweni nasemgudwini wokwakha. Lezi zinhlelo ze-wellpoint zixhunyiwe ngepipi le-header kwi-vacuum pump ephakathi noma iyunithi yokuxhunywa ethatha amanzi phakade. Isenzo se-vacuum silkela amanzi emhlabathini okuzungezile ngefayela le-wellpoint futhi akhishwe ezikhungweni zokuhlanganisa, okusindisa izinga lamanzi ngezikhathi ezithile ngokuya ngezici zomhlaba kanye nemiklamo yesistimu. Le ndlela ikakhulukazi iyasebenza ezihlahleni ezinokuncibilika njengezihlahla, ama-plasti, nezihlahla ezincane lapho isenzo se-capillary singagcina umswakamo ngisho nangemva kokukhuculula amanzi okokuqala. Ukukhuliswa kwama-wellpoint, ukujula kokufakwa, kanye nezinga lokusebenza kwempompo kuncike ekuhloleni kwe-hydrogeological okusekelwe ekwakhiweni komhlaba, izinga lokugeleza kwamanzi, kanye nobude obudingekayo bokunciphisa ukuze kukhishwe izisekelo eziphephile. Izicelo zokukhuculula amanzi ezisekelwa kumapunzi ziqhubeka ezinhlobonhlobo zamaphrojekthi ezisekelo ezijulile kuhlanganisa ukwakhiwa kwe-piled raft, ukufakwa kwepilo efakwe, ukumba ama-piles, kanye nomsebenzi wezisekelo ze-diaphragm wall. Ezindaweni ezakhiwe kakhulu ezisemadolobheni lapho ukuphathwa kokukhuculula amanzi kufanele kwenziwe ngaphandle kokuthinta izakhiwo ezizungezile, ama-wellpoints ahlinzeka ngokuqondisa okuqondile ngesimo samanzi. Azinakho ukungokomthetho futhi nezinhlelo zokuhlwanyela, ekwakhiweni kwamagquma, nasemsebenzini wokwakha ngaphansi kwembewu lapho ukuzinza komhlaba kubalulekile. Izimfuneko zempahla ze-wellpoint zicacile, ziqukethe ama-tube ama-wellpoint, ama-header, izikhungo zokuhlanganisa, kanye nezinkampani ze-vacuum pump—zomuthi zingama-component ampula abaqashi abajwayele ukuphatha. Ukuqhamuka kwama-wellpoint okujwayelekile kuvame ukuhlanganiswa nezinhlelo zokubheka ngesikhathi sangempela ukuze ziqaphe izinga lamanzi kanye nokusebenza kwempompo, kuqinisekisa ukuhambisana nezinqubomgomo zokwakha nezinqubomgomo zemvelo. Ukukhuculula amanzi ezisekelwa kumapunzi kuqhubeka kube yindlela ephumelelayo yokulawula umhlaba ngokwesikhashana uma kuqhathaniswa nezinhlelo zokukhuculula amanzi eziphakade, kwenza kube ukukhetha okuthandwayo kumaphrojekthi wokwakha anokuhora okuphakeme. Ukuphindeka kwezinqubo ze-wellpoint—okunikeza izinga lamanzi ukuthi libuyise emva kokuphothulwa kwephrojekthi—kuvumela ukuphathwa kwemvelo ngenkathi kuvikelwa ukuphila kwezobuchwepheshe bamanzi isikhathi eside. Kubakhi bezisekelo ezijulile abaphathe izimo zomhlaba, idatha yokuhlukaniswa komhlaba, kanye ne-logistics yephrojekthi ngesikhathi esifanayo, imishini ethembekile ye-wellpoint kanye nochwepheshe abanolwazi ekukhuculeni amanzi bonke bangababambisene abaqinile ekuqinisekiseni imiphumela yezinjiniya eziphephile, ezikhumekayo, nezihambisana nomthetho.
Ithuluzi lokufaka ama-wellpoint limele uhlelo olubalulekile lokulawulwa kwamanzi angaphansi komhlaba okwesikhashana emaphandleni ayizinsiza ezijulile kanye nezinhlelo zokushaya ama-pile lapho ukuphathwa kwethebhu zamanzi kubalulekile ukuze ukwakha kuphephe futhi kube nephezulu. Izinhlelo zokukhipha amanzi ama-wellpoint izinketho eziphuthumayo zokwehlisa amanzi angaphansi komhlaba ezenziwe ngama-wellpoint anomphako omncane axhunywe kuphondo lwepipa futhi aphethwe yipompo evakuum ye-centrifugal, idala indawo yokwehliswa edingekayo ezungeze indawo yomsebenzi. Lezi zinhlelo ziwusizo ikakhulukazi ekuhlangabezaneni kokumba okungaphansi kokuphakama, ngokuvamile kusuka kwi-2 kuya kuma-10 amamitha ngaphansi kwe-thebhu yamanzi, lapho ukuthola amanzi evulekile noma ukumpompa amanzi kungaba nezinye izinkinga noma kungasebenzi kahle. Indlela ye-wellpoint ivumela abakhi ukuthi baziqinisekise ngokuqinisa imithombo ethambile, ukuvimbela ukufika kwamanzi angaphansi komhlaba, ukunciphisa ingcindezi ye-hydrostatic ezakhiweni zesikhashana nezokuphepha, kanye nokuvikela izindlela zokwakha ezijulile kubunzima obuhlobene namanzi okungase kuthinte ikhwalithi yokufaka ama-pile, amandla okwakha ezisekelweni, noma ukuphepha kwabasebenzi. Inqubo yokufaka ifuna amathuluzi akhethekile afaka ama-rigs e-wellpoint aklanyelwe ukuhamba noma ukugqadela ama-wellpoint anomphako omncane (ngokuvamile ayi-25 kuya ku-50 ama-milimitha) emithonjeni efana ne-cohesive kanye ne-granular soils. Lezi zinsiza zisebenzisa izindlela zokulwa noma zokuhlasela ukuze zifake ama-wellpoint emaphethelweni endaweni yokumba, edala inethiwekhi ebiyelwe edonsa ukuhamba kwamanzi angaphansi komhlaba. Iphiphu le-header iqoqwa phezulu, ihlanganisa wonke ama-wellpoint endaweni yokumpompa, engase ibe ne-pump ye-centrifugal noma ye-multi-stage evakumwe enokwenzeka yokwakha i-0.6 kuya ku-0.8 bar vacuum. Ukukhetha amathuluzi kuncike ezimweni zomhlaba, ukuphakama okufunekayo kokwehliswa, ubunjongo bokumba, kanye nokuphakama kwethebhu yamanzi. Imithombo ethambile efana nezindawo zamathuli ne-clays ithola izinzuzo eziphakeme ze-permeability eyakhelwe ngu-vacuum pressure, kuyilapho izifunda ezithambile eziningi njengezihlahla ne-gravels ziphendula kalula ekukhipheni amanzi. Abakhi bangase basebenzise izinhlelo ezibalwe zodwa zokufaka eziphakanyisiwe zokusebenzisa ezijulile noma izimo eziningi zokusebenza zokubumba ezijulile, futhi amathuluzi akhethekile afaka ama-strainers, amathangi e-sump, amabhokisi wokukhipha amanzi, ama-risers okungena, kanye nemifantu ehlanganisayo esebenza ngokuhlanganyela ne-unit yokumpompa eyinhloko. Amathuluzi okufaka ama-wellpoint awabalulekile ezimweni eziyinkinga ze-geotechnical ezifaka izimo zomhlabathi ethambile lapho izisekelo ezijulile zama-piling noma ama-caissons zidinga ukulawulwa kwamanzi angaphansi komhlaba, ezindaweni zasemadolobheni lapho izikhala zokwakha zikhawulela ukwakhiwa kwezimali ezinkulu ezithinta amanzi, ezokwakha ezilwandle kanye nezichibiyelo lapho izinguquko zethafa nezokuphathwa kokufula kubalulekile, kanye nezindawo ezonakaliswe ezifaka izinqubo zokukhipha amanzi ezilawulwayo. Izicelo zibandakanya amaphrojekthi wesigodi esisemadolobheni njengezisekelo zezimoto nezidabukakanye, ukwakhiwa kwezinsiza ze-subway kanye nezitimu, ukufakwa kwezimali eziphansi, ukukhumba izindiza zemakethe ukuze kusebenze izakhiwo zokuhweba, kanye nokuthuthukiswa kwezikhungo zezimboni. Ukuhamba phambili kwezinqubo zama-wellpoint kubenza baphatheka ngokuphelele neziqu ezimbili zokuphakamisa, ukufaka ama-sheets, ukwakha ama-secant piles, kanye nezinye izindlela zokwakha ezijulile lapho izimo zokusebenza ezomile noma ukunciphisa ingcindezi yemvelo ezifanele. Abakhiqizi bamathuluzi bakha amaphekheji aphelele e-wellpoint anezingxenye ezivamile ezivumela ukufaka kukhulu nokukhipha, okubalulekile ukuze kusebenza kahle umsebenzi. Amathuluzi e-wellpoint anamuhla ahlanganisa ukuthuthukiswa kwesikhathi eside okuhlanganisa amaphepha amelana nokugqwala, ukusebenza kahle kwepompo okwandisiwe, kanye nemiklamo emisha eyenzela izithuthi nokufaka ezindaweni zomsebenzi ezinezithiyo kulo lonke uMhlaba, i-Asia, kanye neNyakatho Melika.
Iziphumo namafitting zimele izakhiwo ezibalulekile ngaphakathi kwama-sistimu okukhulula amanzi emathunjini, zisebenza njengenethiwekhi yokuhlanganisa nokuhlukanisa ephakathi evumela amanzi angaphansi komhlaba ukuthi akhishwe ezindaweni eziningi zokuphola uhlelo lwezokwelapha noma ezindawo zokukhishwa. Emkhakheni we-geotechnical kanye ne-deep foundation engineering, la ma-sistimu abalulekile ekulawuleni amazinga amanzi angaphansi komhlaba ngesikhathi sokwakhiwa kwamathala, izakhiwo zokupaka ngaphansi komhlaba, imigudu, kanye nezinye izinsiza zokwakha eziphakathi lapho kudingeka ukwehla kwesizinda samanzi okwesikhashana noma okuphakade. Iziphumo zisebenza njengezixhumanisi ezinkulu ezihlanganisa ama-wellpoints ngamaphoyinti aphezulu, ziqoqe amanzi ngaphantsi kokucindezelwa okulawulwa futhi ziqhuba phakathi kwezinyathelo zokwelapha okuhlanganisa izinkundla zokuhlola, amathuluzi okukhulula amanzi, kanye nezinhlelo zokukhishwa zokugcina. Ukukhetha nokuklama izinhlelo zeziphumo kuncike kakhulu emikhiqizweni yamanzi angaphansi komhlaba, izinga lokugeleza, izimo zokuvuleka komhlabathi, kanye nezinga lokumba. Emhlabathini onezinto ezincane njengezinhlaka ne-clays ezinomphumela ophansi, ukukhulula amanzi ngokuhlakanipha okukhethekile kwama-header mains kuba okubalulekile ukugwema ukuhamba komhlabathi, ukuwa kokuzinza, kanye noshintsho oludlulele emikhakheni yokwakha. Usayizi weziphumo ucalwa ngokususelwa ezintweni ezilindelekile ezidingekayo, inani lama-wellpoints ohlelweni, kanye nezinto zokukhishwa ezilindelwe, eziyisilinganiso esivamile esisukela ku-50mm kuya ku-150mm kuya ngosayizi wezinhlelo. Amafitting—okuhlanganisa ukuhlanganyela, ama-valve e-ball, ama-valve okuhlola, kanye nezinhlelo zokuhlanganisa—kufanele akhethwe ukuze afane ne-materiel ye-header main, izilinganiso zengcindezi, kanye ne-corrosive noma i-erosive potential yamanzi angaphansi komhlaba akhishwe. Amafitting aphezulu okuphuma, okwenziwe ngensimbi eyakhiwe kahle, i-ductile iron, noma i-PVC aqinisekisa ukuzinza kwesistimu ngaphansi kokusebenza okuqhubekayo, agweme uku leaking okungathinta ukusebenza kokukhuculula futhi akhuphule izindleko zokusebenza. Ukufakwa kwenethiwekhi yezihloko kuhambisana kahle nezinhlelo zamapompo e-vacuum kanye ne-centrifugal ezijwayelekile ezisetshenziswe emaphrojekthini we-deep foundation, emisebenzini yokwakha izisekelo, kanye nemisebenzi yokuthuthukisa umhlaba. Ukuhlanganiswa kwezihloko kusebenza njengokuhlangana phakathi kwezingxenye ze-wellpoint eziphansi komhlaba ne-infrastructure yokwelapha phezulu, kudinga ukwakheka okuphumelelayo kokukhipha amanzi, ukuholdwa okuqinile ngokumelene namandla e-hydrostatic, kanye nokubekwa okuhle ukuyinciphisa ukulahleka kokugxila. Emigudwini eyinkimbinkimbi ebandakanya izindawo eziningi zokukhulula amanzi, izinhlelo ze-manifold header ezineziqedwa zokwahlukanisa zivumele ukukhetha okungafani kwezingxenye ze-wellpoint, kusheshiswe ukwehla ezindaweni ezithile kanye nokunciphisa ukusetshenziswa kwamandla jikelele kwenqubo. Iziphumo nemafitting akhishiwe kahle futhi ezifakwa kahle zigcina ukusebenza kwenqubo phakathi nezinsukwana ezinde zokukhulula amanzi, zisekela ukufezeka okuphephile kwabantu abasebenza ezindaweni ezinzima zokwakha, okukhwabanisa kwe-caisson, kanye nemisebenzi ye-foundation engineering ezimeni ezinzima ze-hydrogeological phakathi kwezinhlobo ezahlukahlukene zomhlabathi kanye nezimo zamanzi angaphansi komhlaba.
Imigudu yokukhishwa ibonakala iyinqe enkulu yezinhlelo zokukhipha amanzi ezisetshenziswa kabanzi ekwakheni izisekelo ezijulile, ezokufaka izinsika, nezinhlelo zobunjiniyela bemhlabeni. Umumo wepipethi yokukhishwa uthutha amanzi atholiwe aphume ngaphansi komthamo wamanzi, egcina ukulawula amanzi aphilayo kuze kube ngemva kokwakhiwa kwezisekelo ezijulile, ukufakwa kwezinsika, nokwakhiwa kwezikhala. Lezi zinsiza zokukhipha amanzi zesikhashana ziba zibalulekile lapho izimo zamafutha emvelo zifaka ingozi ekuzweleni kokumba noma zinciphise ukufakwa okuhle kwezinsika, ama-casions, noma izindonga ze-diaphagram emhlabeni ogcwele amanzi. Izinhlelo zokukhishwa kamehlo kumele zakheke kahle ukuze zikwazi ukuphatha izinga lokugeleza elihlukahlukene elikhiqizwa yimikhiqizo yokuphumpa ye-wellpoint, ngokuvamile lelanga elikhulu phakathi (50-100mm) flat pipes ezisela kumagqubu aphakeme okukhishwa (100-300mm noma ngaphezulu) kuye ngezimo ze-hydrological zasendaweni nezidingo zomthamo wokukhipha amanzi. Le mikhakha ihlanganisa ama-header okuthola amanzi aqoqa amanzi avela ezinsikeni ze-wellpoint, izixhumi ze-hose eziguquguqukayo zokuhambisana nokunyakaza kwendawo nokukhukhuleka okukhona emikhiqizweni yokufaka izinsika, nokuphuma kokukhishwa okwakhelwe ukuphakanyiswa kamanzi okuphenywa noma ukulethwa ezikhungweni zokuhlanza. Ukukhetha izinto kubalulekile, kuhlanganisa nokusebenzisa i-polyethylene, i-PVC, kanye ne-rubber hose eqinile, okunconywayo ngokusekelwe kumakhemikhali omhlabathi, izikhwama ze-particle eziyisongele, nezidingo zokpressi. Emhlabeni unigela ophumayo onokuphumeka okuphansi ne-piezometric head ephezulu, izinga lokukhishwa lingaba likhulu, kudinga ukwakhiwa okwenziwe kahle kwepipethi kanye nezibalo ezifanele zomthamo. Ekuphakathini kwezihlahla ezisanda kuhloma zokufana nezihlabathi noma ngaphandle, umthamo wokukhishwa ubonakala ungaphatheka kalula, nakuba usayizi ofanele usaqhubeka ubalulekile ukuze unciphise ukulahleka kwamandla aphumayo nokugcina ukusebenza kahle kwesistimu. Izicelo zihlanganisa izimo ezahlukahlukene zobunjiniyela bemhlaba kuhlanganisa nokumba izikhala ezijulile ezikhaleni zamadolobha, ukufakwa kwepali eyinhloso enkulu lapho izinga lamanzi kufanele lilawulwe ngesikhathi sokumba, ukwakhiwa kwesikhala se-sheet pile cofferdam ngezisekelo zama-brij, kanye nokukhishwa kwegquma elijulile ukuze kuhlangatshezwane nezinsiza eziphansi nezinsiza. Umumo wepipethi yokukhishwa kufanele ubheke amazinga endaweni, amaphuzu okukhishwa atholakalayo, imithetho yezemvelo elawula ikhwalithi yamanzi, kanye nemiphumela engaba khona emapulazini aseduze. Emhlabeni obunjiwe noma ocabhele, ukunciphisa ngokweqile ngaphandle kokuphatha kahle kokukhishwa kungaholela ekubumbeni komhlaba noma ekwehliseni ama-piping. Ngokuphambene, ezindaweni ezibandayo eziphathelene neziqukathi ezisemaphakathini, izinhlelo zokukhishwa kamehlo zivikela ukwehla okuhle kwepali yokuphila ukuze kuqinisekiswe izimo eziyinqaba zokufaka imishini yokufaka izinsika nokulungiselela umhlaba. Ukuqinisekisa ukwakhiwa okufanele nokufakwa kwemigudu yokukhishwa kusebenza kahle, kuqinisekisa ukususa amanzi ngokushesha futhi kahle endaweni yokukhipha amanzi, kugcina ukuzinza kanye nokuphuma okuhle komhlaba ngesikhathi sezigaba zokwakha izisekelo ezijulile. Ukuhlaziywa kwesistimu kufaka phakathi ukukala okuphindaphindayo kwezinga lokugeleza, ukuhlolwa kokwakha kwepipethi, nokuphathwa kwama-sediment ukuvimbela ukuvimbela. Ukuphathwa kwepipethi yokukhishwa okuhle kuhlanganisa kahle nezinsizakusebenza, ukuphathwa kwemali, nezimo zokuphepha eziphumelelayo emikhiqizweni yokwakha eyehluka ehlanganisa izinsika ezijulile, izindandatho, noma ukusebenza okumbalwa phezulu kwetafula lamanzi lapho ukuzinza komhlaba kubalulekile.
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