Ko te Waahanga Kohu Meter DH he taputapu ine aunoa rorohiko i hangaia mo te kohu me te whakawhiti marama o te pepa kirihou maramara, pepa, kiriata kirihou, karaihe papatahi. Ka taea hoki te whakamahi i roto i nga tauira o te wai (wai, inu, ho'oraa, wai tae, hinu) inenga o te turbidity, rangahau putaiao me te ahumahi me te mahi ahuwhenua he waahanga tono whanui.