(1)    In this section:

      (a)    “Nonpoint source” has the meaning given in s. 281.16 (1) (e).

      (b)    “Point source” has the meaning given in s. 283.01 (12).

   (2)   The department shall conduct a program to monitor and study the introduction of nutrients from point sources and nonpoint sources into the East and West Twin Rivers, the Manitowoc River, the Sheboygan River, and the streams that outlet to Lake Michigan and that lie in and between the Ahnapee River watershed and the Sauk Creek watershed. The department shall seek to do all of the following under this subsection:

      (a)    Identify the amounts of nutrients being introduced into these waters.

      (b)    Characterize and quantify the nutrients, in particular nitrogen and phosphorus, introduced into these waters from nonpoint sources relative to climate, land use, soil type, elevation, and drainage.

      (c)    Collect water quality information from locations on these waters and from major tributaries and major impoundments to use in evaluating the biological, physical, and chemical properties of the water and to use as data in watershed and river models.

      (d)    Use watershed and river models and the information collected under this subsection and from other sources to forecast the effect on water quality of different methods of reducing the amounts of nutrients introduced into these waters.

      (e)    Develop tools to use in selecting and implementing methods of reducing the amounts of nutrients introduced into these waters.