What defines “agriculture” and “urban” in the analyses of trend in streams?
Because the number of sites meeting the NAWQA criteria for agricultural and urban land-use classification (see “What defines an “agricultural”, “urban”, and “undeveloped” stream site in NAWQA studies?”) was too small for statistical analysis, boundaries of greater than 40 percent agricultural land use in the basin and greater than 10 percent urban land use in the basin were used instead. The remaining land use in the basin was not considered in the classification of sites.
