- MONERIS (N, P)

The nutrient emission Model MONERIS (MOdelling Nutrient Emission in RIver Systems)
was developed and applied to estimate nutrient inputs into river basins by point sources and various diffuse pathways. MONERIS estimates the different pathways using existing approaches as well as new conceptual approaches developed especially for modelling at medium and large spatial scales. It also considers retention of nutrients in rivers basins. Due to the limited and often inconsistent data available for large-scale modelling, MONERIS was designed to work with information collated from standard monitoring programs or available from federal bureaus.
The model is based on:

• data of river flow (from gauging stations)
• water quality (nutrient concentrations from monitoring stations)
• statistical data about nutrient inputs into the catchment
• geographical data (stored and analysed in a Geographic Information System (GIS)

The model is composed of a series of equations that allow the estimation of point sources and diffuse sources into the stream.