Zindawo eziqhelekileyo ezibonisa isibhakabhaka sedolophu- ngokucekeceke ngokuthe gca kodwa kwihlabathi elidala-kodwa wazi kangakanani malunga neenqaba zamanzi, kutheni sisazisebenzisa kwaye zikhuseleke njani iitanki apho sigcina khona amanzi ethu okusela zi?
Gcina Ncamathisela (Ityala lemifanekiso: Unyango lweNdlu)
Amanzi ombane kamasipala weSixeko saseNew York abonelela ngoxinzelelo olwaneleyo lokuphakamisa amanzi malunga namabali amathandathu phezulu emoyeni. Njengoko izakhiwo zokujika-zenkulungwane ziye zikhula zaya zisiba zide, ngokunjalo nemfuno yamanzi kwiindawo eziphakamileyo. Umxholo wenqaba yamanzi ulula: itanki ephakanyisiweyo izaliswa yimpompo yombane kwigumbi elingaphantsi kwesakhiwo, kunye namandla omxhuzulane kuloo manzi anzima amanzi enza uxinzelelo olufunekayo ukusasaza amanzi kumgangatho ngamnye.
Iinqaba zamanzi ngokwesiqhelo zazakhiwa ngamaplanga omsedare adityaniswa ngokudityaniswa ngamabhanti esetyhula. Kule mihla, ezinye iitanki ezintsha zenziwe ngentsimbi kodwa okumangalisayo kukuba, umsedare otyhafileyo unamandla kakhulu (ungasathethi ke ngokukhanya okuncinci nangabizi kakhulu) kwaye oko kusasetyenziswa nanamhlanje. Ngapha koko, akukho nto ingako itshintshileyo malunga neetanki zamanzi ngaphezulu kweminyaka eli-100. Uninzi lwezakhiwo ezitsha ngoku zakhiwe ngeempompo ezingaphantsi ezinamandla ngakumbi eziphikisayo isidingo soxinzelelo lwe-hydrostatic, kodwa phantse i-17,000 isasetyenziswa kwizakhiwo ezindala zeNew York City namhlanje.
Ke ngubani kanye kanye okhathalayo eyakho ukwakha amanzi? Ngelixa isiXeko saseNew York sihlala siqhayisa ngokuba amanzi okusela angcono kwilizwe , kwizigidi zabahlali, ezi tanki ziphetheyo zezindawo zokugqibela zamanzi phambi kokubetha iiglasi zabo zokusela. Ngoku ka i INew York Times , amatanki ahlala engakhathalelwanga de abe nokuba yingozi. Nangona kufuneka zicocwe minyaka le, loo mithetho yezempilo ayifane inyanzeliswe. Iinqaba ezinganyangekiyo zinokuqokelela umaleko welindle kunye neebhaktiriya, kwaye izembozo ezonakeleyo zinokushiya ubonelelo lwamanzi luvuleleke emoyeni ovulekileyo nayo yonke into ehamba nayo: umsi, ubutyobo kunye neentaka okanye iimpuku. Xa ifayile ye- Amaxesha kuvavanywe i-12 yezakhiwo ezingahleliwe kwiidolophu ezintathu, bafumanisa iibacteria ze-coliform kwisibhozo kunye no-E. coli kwabahlanu. Ukusukela ekuphela komthombo onokubakho we-E. Coli kukusasazeka kwezilwanyana, kukho isizathu esaneleyo sokuxhalaba ukuba iinqaba azitywinwanga ngokufanelekileyo.
Ingxaki kukulawulwa. Abanini bezakhiwo banoxanduva lokugcina inqaba yamanzi, kodwa zingama-42 kuphela kwezili-100 izakhiwo ezihloliweyo ngokungacwangciswanga ezinokubonisa ukuba banokuvavanya amanzi abo kwintsholongwane, kungasasetyenziswa rhoqo ukubulala iintsholongwane kwitanki. Isebe lezempilo libanga ukuba uvavanyo lwamaXesha aluchanekanga kuba bathabathe iisampulu emazantsi etanki (apho inkunkuma iqokelela khona) engaphantsi kombhobho wokudonsa otsala amanzi, kodwa ndicinga ukuba sonke singavuma ukuba ukusela ngqo ityhubhu yamanzi agcwele ibacteria (nokuba kwenzeka ntoni ukuqhambuka kwebhakteria) ayiyongcamango ilungileyo.
Kutheni kungekho mntu ujongana nento ebonakala ngathi ingumba okhawulezileyo wokhuseleko loluntu kwizigidi zabantu baseNew York (kwaye ngokungathandabuzekiyo abahlali bezinye izixeko ezisebenzisa iinqaba zamanzi)? Asiqinisekanga. Kungadla i-300,000 yeedola ukuseta isiseko sedatha ukulandelela uhlolo lwenqaba yamanzi, kunye ne- $ 65,000 ngonyaka ukuyigcina, ukuze ibe nento yokwenza nokungabikho kwamanyathelo. Kodwa kubonakala ngathi lixabiso elincinci lokuhlawulela uhlaziyo olufuneka kakhulu kule teknoloji ineminyaka eli-100 ubudala.
Ulwazi nge INew York Times kwaye Izixeko ezingafakwanga ndawo .
