Pollutants:24 types of antibiotics for several animal species
Sources: diffuse (manure application) and point sources (direct discharge of manure) of antibiotics in groundwater and in rivers via runoff and erosion
Main inputs: livestock numbers, antibiotic consumption and excretion rates per animal type, degradation in soils, runoff and erosion rates, soil organic content, soil texture, hydrology
Main outputs: inputs of antibiotics to rivers in 395 sub-basins by antibiotic type and animal species
Modelling approach
Figure 1: Conceptual framework of the model application to 395 sub-basins in China
Modelling output (example)
Figure 2: Total amount of antibiotics excreted in animal manure (kg/year, Qi Zhang and others, under development)