2. Development of BMP Cost-Effectiveness Values

We have accounted for operation and maintenance costs and the SCS life

expectancy of

evaluated effectiveness and cost-effectiveness *relative to typical*

Equations **for Calculating.Cost-Effectiveness**

2.2.3.1

The following equation was used to estimate yearly per-hectare cost for a

practice:

The sources for the parameters in the above equation are discussed in Section

2.2.1.

Cost-effectiveness values presented in this report are calculated according to one

of two equations. If effectiveness values were reported in terms of kilograms

reduced per hectare-year, then the following equation is used:

The effectiveness of certain in-field practices (e.g., vegetated filter strips) are

reported as percent reductions. In these cases, it was necessary to convert the

percentages to an estimated load reduction. This process, discussed in Section

2.2.2, uses the following