Effects of NRCS Conservation Practices - National

Shallow Water Development and Management Code: 646

Units: ac.

C F R P Pr FS D W 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 1

 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 0

 Pesticides in Groundwater 0

 Nutrients in Surface water 1

 Nutrients in Groundwater 1

 Salts in Surface Water 0

 Salts in Groundwater -1

 Excess Pathogens and Chemicals from Manure, Bio-solid 2 

 Excess Pathogens and Chemicals from Manure, Bio-solid -1 

Not Applicable

Not Applicable

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. 

Not Applicable

The action requires ponding water which will increase infiltration in ponded areas, which may carry soluble salts to groundwater. 

vegetation, microbes, and sediments may trap

The action requires ponding water, which will increase infiltration in ponded areas. Infiltrating waters may leach pathogens. 

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Provide temporary flood storage.

The inundation of lands to provide habitat for fish and/or wildlife.

Organic matter oxidation is reduced in flooded areas. Where soil moisture is enhanced vegetative growth will be increased.

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 2

 Elevated Water Temperature 0

 Petroleum, Heavy Metals and Other Pollutants Transporte 2

 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) 0

 Objectionable Odors 0

Degraded Plant Condition

 Undesirable Plant Productivity and Health 2

 Inadequate Structure and Composition 4

 Excessive Plant Pest Pressure 1

 Wildfire Hazard, Excessive Biomass Accumulation 0

Fish and Wildlife - Inadequate Habitat

 Inadequate Habitat - Food 4

 Inadequate Habitat - Cover/Shelter 2

 Inadequate Habitat - Water 0

 Inadequate Habitat - Habitat Continuity (Space) 4

Livestock Production Limitation

 Inadequate Feed and Forage 1

 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

Improved availability of wildlife food is created by water and moist soil management. 

Fish and wildlife habitat is a management objective. 

Shallow water habitat/space is created and/or managed.

These sites may be used as feed and forage by livestock if the intended purpose is maintained.

Not Applicable

Improved availability of wildlife food is created by water and moist soil management. 

Not Applicable

Not Applicable

There is short term carbon storage, however, periodic maintenance practices (tillage, burning) can release stored carbon.

Not Applicable

Plants are selected and managed to maintain optimal productivity and health for their intended use.

Moist soil management creates or maintains the desired plant community. 

Management of water to establish vegetation desirable for wildlife is expected to retard invasive plants.

Not Applicable

The action requires ponding water which will increase infiltration in ponded areas. Infiltrating waters may leach heavy metals. 

Ponding slows water velocity, allowing sediment to settle.

Water released from impoundments may be warmer or cooler than receiving waters, depending on site conditions.

Vegetation and anaerobic conditions trap heavy metals.