Kusintha kwa nyengo ndi kukwera kwachangu kwa mafakitale ndi ulimi padziko lonse lapansi kwapangitsa vuto la kusowa kwa madzi abwino kukhala lalikulu kwambiri, komanso kupezeka kwa madzi abwino kukukulirakulira, kotero kuti mizinda ina ya m'mphepete mwa nyanja nayonso ilibe madzi. Kusokonekera kwa madzi kumapangitsa kuti madzi a m'nyanja achotse mchere wambiri kuposa kale lonse. Zida zochotsera mchere mu Membrane ndi njira yomwe madzi a m'nyanja amalowa kudzera mu membrane wozungulira wopindika, mchere wambiri ndi mchere m'madzi a m'nyanja zimatsekeka kumbali yakuthamanga kwambiri ndipo zimatsanulidwa ndi madzi a m'nyanja okhazikika, ndipo madzi abwino akutuluka. kuchokera kumbali yotsika yapansi.

Malinga ndi National Bureau of Statistics, kuchuluka kwa madzi opanda mchere ku China kunali ma kiyubiki metres 2830.6billion mu 2015, zomwe zimawerengera pafupifupi 6% ya madzi padziko lonse lapansi, omwe ali pachinayi padziko lonse lapansi. Komabe, madzi abwino a munthu aliyense ali ndi ma kiyubiki mita 2,300 okha, omwe ndi 1/35 chabe ya avareji yapadziko lonse, ndipo pali kuchepa kwa madzi abwino achilengedwe. Chifukwa chakuchulukirachulukira kwachuma komanso kutukuka kwamatauni, kuyipitsidwa kwamadzi am'madzi kumakhala kowopsa makamaka chifukwa cha madzi otayira m'mafakitale komanso zimbudzi zapanyumba zamatawuni. Kuchotsa mchere m'madzi a m'nyanja kukuyembekezeka kukhala njira yayikulu yowonjezeramo madzi akumwa apamwamba kwambiri. Makampani aku China ochotsa mchere m'madzi a m'nyanja amagwiritsa ntchito 2/3 mwa onse. Pofika mu Disembala 2015, ntchito zochotsa mchere m'madzi a m'nyanja 139 zamangidwa mdziko lonse lapansi, ndi kuchuluka kwa matani 1.0265million/tsiku. Madzi aku mafakitale amakhala 63.60%, ndipo madzi okhalamo amakhala 35.67%. Ntchito yochotsa mchere padziko lonse lapansi imagwiritsa ntchito madzi okhalamo (60%), ndipo madzi am'mafakitale amangotenga 28%.

Cholinga chachikulu cha chitukuko cha luso la kuchotsa mchere m'madzi a m'nyanja ndi kuchepetsa ndalama zogwiritsira ntchito. Pakuphatikiza ndalama zogwirira ntchito, kugwiritsa ntchito mphamvu zamagetsi kumakhala gawo lalikulu kwambiri. Kuchepetsa mphamvu yogwiritsira ntchito mphamvu ndiyo njira yabwino kwambiri yochepetsera ndalama zochotsera madzi a m'nyanja.