Middle Nodaway River IA 05-NOD-1400

from confluence with West Fork Middle Nodaway R. (S33 T74N R33W Adair Co.) to confluence with unnamed tributary in S1 T75N R32W Adair Co.

This is a Legacy Assessment. Prior to 2004, assessments were developed under a methodology that pre-dated the Integrated Report guidelines.

Assessment Cycle

2000

Result Period

1996 - 1998

Designations

Assessment Methodology

2000 Methodology Document

Assessment Type

Monitored

Integrated Report

Category 0

Legacy ADBCode

IA 05-NOD-0070_0

Overall Use Support

Not supporting

Aquatic Life Use Support

Not supporting

Documentation

Assessment Comments

1998 Biocriteria: Fish IBI= 19(poor), BM-IBI= 44(fair).

Basis for Assessment

The assessment was based on data collected in 1998 as part of the DNR/UHL stream biocriteria project. A series of biological metrics which reflect stream water quality and habitat integrity were calculated from the biocriteria sampling data. The biological metrics are based on the numbers and types of benthic macroinvertebrate taxa and fish species that were collected in the stream sampling reach. The biological metrics were combined to make a fish community index of biotic integrity (F-IBI) and a benthic macroinvertebrate index (BM-IBI). The indexes rank the biological integrity of a stream sampling reach on a rising scale from 0 (minimum) to 100 (maximum).

The F-IBI score was 19 (poor) and the BM-IBI score was 44 (fair). The aquatic life use support was assessed as not supporting (=NS), based on a comparison of the F-IBI and BM-IBI scores with biological assessment criteria established specifically for the 2000 Section 305(b) report. The biological assessment criteria were determined from a statistical analysis of data collected at stream ecoregion reference sites from 1994-1998.

Monitoring and Methods

Assessment Key Dates

10/21/1998	Biological Monitoring

Methods

330	Fish surveys
380	Quan. measurements of instream parms-- channel morphology-- floodplain-- 1-2 seasons-- by prof
220	Non-fixed station physical/chemical monitoring (conventional pollutant only)
315	Regional reference site approach
320	Benthic macroinvertebrate surveys

Monitoring Levels

Biological	4
Habitat	4
Physical Chemistry	1
Toxic	0
Pathogen Indicators	0
Other Health Indicators	0
Other Aquatic Life Indicators	0
# of Bio Sites	1
BioIntegrity	Poor

Causes and Sources of Impairment

Causes	Use Support	Cause Magnitude	Sources	Source Magnitude
Other habitat alterations	Overall Use Support	High	Agriculture Bank or Shoreline Modification/Destabilization Channelization Habitat Modification (other than Hydromodification) Hydromodification	Moderate Moderate High Moderate Moderate
Other habitat alterations	Aquatic Life Support	High	Agriculture Bank or Shoreline Modification/Destabilization Channelization Habitat Modification (other than Hydromodification) Hydromodification	Moderate Moderate High Moderate Moderate
Organic enrichment/Low DO	Overall Use Support	Moderate	Agriculture	Moderate
Organic enrichment/Low DO	Aquatic Life Support	Moderate	Agriculture	Moderate
Siltation	Overall Use Support	Moderate	Agriculture Bank or Shoreline Modification/Destabilization Channelization Habitat Modification (other than Hydromodification) Hydromodification	Moderate Moderate High Moderate Moderate
Siltation	Aquatic Life Support	Moderate	Agriculture Bank or Shoreline Modification/Destabilization Channelization Habitat Modification (other than Hydromodification) Hydromodification	Moderate Moderate High Moderate Moderate
Turbidity	Overall Use Support	Moderate	Agriculture Bank or Shoreline Modification/Destabilization Channelization Habitat Modification (other than Hydromodification) Hydromodification	Moderate Moderate High Moderate Moderate
Turbidity	Aquatic Life Support	Moderate	Agriculture Bank or Shoreline Modification/Destabilization Channelization Habitat Modification (other than Hydromodification) Hydromodification	Moderate Moderate High Moderate Moderate