Calculation tools with verifiable scientific methodology. Instant results, free, no signup.
Simulate the dissolved-oxygen sag curve downstream of a discharge.
Open calculator →7 indices: NSF, IDEAM, Dinius, ICOMO, ICOSUS, ICOMI.
Open calculator →River-discharge conservative mixing, pollutant load and required removal.
Open calculator →Biological treatability: BOD/COD, C:N:P balance, inhibitors and treatment recommendation.
Open calculator →