The goal of this project is to construct, calibrate, and validate a watershed model using HSPF. RESPEC will produce a HSPF model that can readily be used to provide information to support conventional parameter TMDLs.
Jackson SWCD will collect water chemistry data at three sites; West Fork Little Sioux River, Little Sioux River, and the Loon Lake Outlet. A full suite of lab and field parameters will be collected May - September in 2011 and 2012 at all three sites.
The purpose of this project is to complete Intensive Hydraulic Conditioning on the remaining 60% of the watershed to be able to utilize the Prioritize, Target, and Measure application (PTMApp). The basin has 1.1 million acres of drainage with approximately 630,000 acres remaining to be hydro conditioned. With the advancement in targeting pollution sources within the watershed and state, the partners intend to be able to more accurately target conservation practices with the hydraulic conditioning completed.
Lake Okabena does not meet state water quality standards due to high phosphorus levels. The Total Daily Maximum Load Study identified a 70% reduction in phosphorus from the watershed is needed to meet water quality standards. The City of Worthington owns the recently closed Prairie View Golf Course. Okabena Creek flows through the golf course and some small ponds. This project will modify these three ponds to increase storage and removal efficiency, and add an iron-enhanced filter bench to enhance soluble phosphorus removal.
The Nobles Soil and Water Conservation District (SWCD) will test waters needing data for impairment listing in the Rock River and Little Sioux watersheds. Two reaches of the Little Rock River and the Ocheyedan River need stream water assessments. Iowa Lake needs sampling completed for impairment identification. The project will obtain adequate stream and lake data to either list the tested stream reaches and lake on the 303(d) list as impaired, or provide evidence that the stream reaches and lake is not impaired.