Okpu ndị a na-etolite akara siri ike ma na-enye ezigbo mgbochi kemịkalụ. Nke a liner na-akpụzi onwe ya n'akụkụ ebe a na-emechi emechi ka a na-agbanye okpu ahụ, na-ekpochapụ ntanye, evaporation, mmetọ, njide na nkwụghachi azụ. Ọ dị mma maka ihe ọ bụla site na mmiri mmiri, na ncha, na nnukwu-invertebrates.