Spatial statistics allow one to determine the overall clustering degree of cell runoff in the watershed and to locate statistically significant clusters of similar runoff values, which have particular implications for comparing alternative land management strategies in the context of AGNPS water quality modeling.
This study used the runoff datasets of eight different cell sizes that have been previously simulated using the AGNPS pollution model by Usery et al.
Young RA, Onstad CA, Bosch DD, Anderson WP (1987) AGNPS
, Agricultural-Non-Point-Source Pollution model: a large watershed analysis tool.
says that NRCS planners use AGNPS for watersheds as large as 500 square miles.
What AGNPS does that no other model can do is allow us to track pollutants back to their source," Theurer says.
With AGNPS, Young explains, he can divide a watershed into grids of any size.