Water quality data was used to identify priority areas and geographic analysis was used to identify which best management practices (BMPs) might be most effective at reducing nonpoint source pollution in these areas. Public input was also considered.
FIG 1 | Water quality results were used in the selection of priority areas. The map above shows the priority areas for nitrate, phosphorus, E. coli, TSS, and biology and habitat.
|County||Acres in Watershed||Percentage|
TABLE 1 | Critical Areas Listed by County and Impairment
|Nutrients||Deer Creek, Little Deer Creek, Barren Creek, Lugar Creek, Little Walnut Creek||Little Walnut Creek, Little Lick Creek||Halfway Creek||Halfway Creek||Little Mississinewa, Gray Branch||Little Mississinewa, Gray Branch|
|E. coli||Lugar Creek, Barren Creek||Little Lick Creek, Big Lick Creek||Little Mississinewa||Little Mississinewa|
|Sediment||Walnut Creek||Little Walnut Creek||Campbell Creek||Little Mississinewa, Gray Branch, Campbell||Little Mississinewa, Gray Branch|
Land use data and water quality data were analyzed to identify sources of non point pollution throughout the watershed. This data was also used to prioritize each source. For example, data indicated that in subwatersheds with the highest TSS levels, the main source of the TSS was stream banks, as indicated in the table to the right.
TABLE 2 | Priority sources for nonpoint impairment reduction