Effects of NRCS Conservation Practices - National

Constructed Wetland Code: 656

Units: ac.

C F R P Pr FS O AL

Soil Erosion Effect Rationale

Soil Erosion - Sheet and Rill Erosion 0

Soil Erosion - Wind Erosion 0

Soil Erosion - Ephemeral Gully Erosion 0

Soil Erosion - Classic Gully Erosion 0

Soil Erosion - Streambank, Shoreline, Water Conveyance C 0

Soil Quality Degradation

 Organic Matter Depletion 0

 Compaction 0

 Subsidence 0

 Concentration of Salts or Other Chemicals 0

Excess Water

 Excess Water - Seeps 0

 Excess Water - Runoff, Flooding, or Ponding 2

 Excess Water - Seasonal High Water Table 0

 Excess Water - Drifted Snow 0

Insufficient Water

 Insufficient Water - Inefficient Use of Irrigation Water 0

 Insufficient Water - Inefficient Moisture Management 0

Water Quality Degradation

 Pesticides in Surface Water 2

 Pesticides in Groundwater 1

 Nutrients in Surface water 4

 Nutrients in Groundwater 1

 Salts in Surface Water 1

 Salts in Groundwater 1

 Excess Pathogens and Chemicals from Manure, Bio-solid 4 

 Excess Pathogens and Chemicals from Manure, Bio-solid 3 

The action captures pesticide residues and facilitates their degradation.

The action captures pesticide residues and facilitates their degradation.

The action traps nutrients and organics which are broken down and used by wetland plants. 

The action traps nutrients and organics which are broken down and used by wetland plants. 

Any salts in surface runoff will be detained in the wetland. Some wetland plants may take up salts.

Any salinity in runoff or wastewater will be assimilated in the wetland rather than infiltrating to groundwater.

Pathogens are trapped in the wetland.

Microbial activity in wetlands can reduce pathogen levels.

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Provide temporary flood storage.

An artificial ecosystem with hydrophytic vegetation for water treatment.

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

AL-Aso Land 

W-Water 

O-Other 

D-Developed 

FS-Farmstead 

Pr-Protected 

P-Pasture 

F-Forest 

R-Range 

C-Crop

Typical Landuse:
 Excessive Sediment in Surface Water 5

 Elevated Water Temperature 0

 Petroleum, Heavy Metals and Other Pollutants Transporte 4

 Petroleum, Heavy Metals and Other Pollutants Transporte 1

Air Quality Impacts

 Emissions of Particulate Matter (PM) and PM Precursors 0

 Emissions of Ozone Precursors 0

 Emissions of Greenhouse Gases (GHGs) 1

 Objectionable Odors -1

Degraded Plant Condition

 Undesirable Plant Productivity and Health 0

 Inadequate Structure and Composition 4

 Excessive Plant Pest Pressure -2

 Wildfire Hazard, Excessive Biomass Accumulation 0

Fish and Wildlife - Inadequate Habitat

 Inadequate Habitat - Food 3

 Inadequate Habitat - Cover/Shelter 3

 Inadequate Habitat - Water 0

 Inadequate Habitat - Habitat Continuity (Space) 2

Livestock Production Limitation

 Inadequate Feed and Forage 0

 Inadequate Shelter 0

 Inadequate Water 0

Inefficient Energy Use

 Equipment and Facilities 0

 Farming/Ranching Practices and Field Operations 0

CPPE Practice Effects: 0 No Effect

5 Substantial Improvement -1 Slight Worsening

4 Moderate to Substantial Improvement -2 Slight to Moderate Worsening

3 Moderate Improvement -3 Moderate Worsening

2 Slight to Moderate Improvement -4 Moderate to Substantial Worsening

1 Slight Improvement -5 Substantial Worsening

Not Applicable

Not Applicable

Not Applicable

Increased quality and quantity of vegetation provides more cover for wildlife. 

The wetland provides additional water but it will likely be chemical-laden and unfit for fish and wildlife use.

Additional wetland space is created.

Not Applicable

Not Applicable

Increased quality and quantity of vegetation provides more food for wildlife. 

Not Applicable

Not Applicable

The accumulation of organic matter and sediments sequester carbon. However, anaerobic conditions can promote the generation of 

methane.

Anaerobic conditions can promote the generation of hydrogen sulfide and other odorous compounds.

Not Applicable

Plants selected are adapted and suited. 

Could create habitat for noxious invasive plants

Not Applicable

Heavy metals attached to sediment can be trapped in wetlands. 

System traps and holds suspended materials from entering surface waters.

Footprint usually too small for effect. 

Vegetation and anaerobic conditions trap heavy metals.