Esinye sezona zicelo zixhaphakileyo kwiimpompo ezingaphantsi kwamanzi ziinkqubo zamaqula. Ezi mpompo zisetyenziswa kakhulu ukutsala amanzi aphantsi komhlaba kunye nokunikezela ngawo kwiifama, amakhaya kunye nezinye izakhiwo zorhwebo. Kwiimeko zezolimo, iimpompo eziphantsi kwamanzi zinceda ukuqinisekisa ukunikezelwa kwamanzi okunkcenkceshela ngokuzinzileyo. Ngokutsala amanzi aphantsi komhlaba, ezi mpompo zikhuthaza ukukhula kwezityalo kwaye zinceda ukwandisa imveliso yezolimo ngokubanzi. 

Ukongeza kwiinkqubo zamaqula, iimpompo eziphantsi kwamanzi zibalulekile ekulawuleni ugutyulo kunye neenkqubo zamanzi amdaka. Eziimpompo yokunkcenkceshela ephantsi kwamanziidlala indima ebalulekileyo ekuthinteleni izikhukula kunye nokugcina ukuhamba okuqhelekileyo kwamanzi amdaka. Xa imvula enkulu isenzeka, impompo ephantsi kwamanzi inokususa ngokufanelekileyo amanzi angaphezulu kwaye ithintele nawuphi na umonakalo onokwenzeka. 

Ngokunjalo, iimpompo ezingaphantsi kwamanzi zisetyenziswa ngokubanzi kushishino lokwakha. Nokuba kukukhupha amanzi kwindawo yolwakhiwo okanye kukukhupha amanzi kwiindawo ezizele zizikhukula, uxhomekeke kwezi mpompo ukugcina indawo osebenza kuyo ikhuselekile kwaye yomile. Ukukwazi kwabo ukusebenza ngaphantsi kwamanzi kubavumela ukuba basuse ngokufanelekileyo amanzi kunye nokugcina indawo yokusebenza ezinzileyo. 

Zidlala indima ebalulekileyo ekukhupheni ioli ekrwada emathunjini omhlaba. Akunjalo kuphela ezi mpompo ezikwaziyo ukujongana neemeko ezifunekayo, ziqinisekisa kwakhona inkqubo yokukhupha ngokukhawuleza. Ziquka injini etywiniweyo edityaniswe ngokuqinileyo nomzimba wempompo. I-motor ikhuselwe yindlu engenamanzi, iqinisekisa ukusebenza okuqhelekileyo naphantsi kwamanzi. Ipompo idonsa ulwelo nge-inlet kwaye ikhuphe ulwelo ngombhobho wokukhupha. Le nkqubo iphinda-phinda, idala ukuhamba okungaguqukiyo kolwelo.