The next-generation of ESII is here! Ecosystem Intelligence (EI) is a comprehensive quantification platform for nature-based decisions.
| Survey Question | Pervious Area: Pervious Road | |
| A pervious road is a man-made surface composed of material that is pervious to water (e.g. gravel or bare ground). Responses shown assume the surface material is gravel. If other materials are used the responses should be adjusted accordingly (e.g. if material is bare ground then exposed surface should be "dark soil"). All responses should be reviewed against desired outcomes for a given project design. However, highlighted responses below require answers specific to each map unit condition regardless of design (e.g. soil conditions, slope, water regime, etc.) because these conditions are unique to every map unit for this habitat type. | ||
| Survey Response | Considerations | |
| Habitat Type | Developed or Managed | Assumes well established and maintained condition |
| Which of the following best describes the map unit habitat type? Select only one. | Pervious Area: Trail, Road, Staging Area, Compacted Gravel, Etc. | Assumes well established and maintained condition |
| Which vegetation type is dominant within the map unit? Select one. | No vegetation present | Assumes well established and maintained condition |
| What is the average height of the dominant vegetation? | 0-3.5' | Assumes well established and maintained condition |
| What type of shrub or tree is dominant? | Not present | Assumes well established and maintained condition |
| Non-woody, soft and green stems group | Not present/Negligible | Assumes well established and maintained condition |
| Shrub group | Not present/Negligible | Assumes well established and maintained condition |
| Tree group | Not present/Negligible | Assumes well established and maintained condition |
| What is the TOTAL area of the map unit occupied by standing stems and/or trunks of vegetation? | Not present/Negligible | Assumes well established and maintained condition |
| Non-woody, soft and green stems group | Not present/Negligible | Assumes well established and maintained condition |
| Shrub Group | Not present/Negligible | Assumes well established and maintained condition |
| Tree Group | Not present/Negligible | Assumes well established and maintained condition |
| What is the TOTAL aerial cover within the map unit? | Not present/Negligible | Assumes well established and maintained condition |
| What is the total aerial cover along the map unit's edge? | Not present/Negligible | Assumes well established and maintained condition |
| Emergent | Not present/Negligible | Assumes well established and maintained condition |
| Submergent | Not present/Negligible | Assumes well established and maintained condition |
| Floating mats | Not present/Negligible | Assumes well established and maintained condition |
| What is the total cover for all aquatic vegetation (emergent, submergent and floating mat) within the map unit? | Not present/Negligible | Assumes well established and maintained condition |
| What is the dominant material exposed to the sun? | Gravel | Assumes well established and maintained condition |
| What percent of the map unit's ground surface is covered by fallen stems/branches that are less than 3 inches in diameter? | Not present/Negligible | Assumes well established and maintained condition |
| What is the average density of the stems/branches? | Not present | Assumes well established and maintained condition |
| What percent of the map unit is covered by litter/duff? | Not present/Negligible | Assumes well established and maintained condition |
| What is the average thickness of the litter/duff layer? | Not present | Assumes well established and maintained condition |
| What percent of the map unit's surface is exposed (not covered by living or dead vegetation)? | >90% | Assumes well established and maintained condition |
| Which type of natural or man-made materials is most dominant? For aquatic habitats select the bed material. Select one. | Man-made pervious/porous surface | Assumes well established and maintained condition |
| Organic material | Not present/Negligible | Assumes well established and maintained condition |
| Clay (<0.002 dia.) | Not present/Negligible | Assumes well established and maintained condition |
| Silt (0.002 - 0.05 dia) | Not present/Negligible | Assumes well established and maintained condition |
| Sand (0.05 - 0.1) | Not present/Negligible | Assumes well established and maintained condition |
| Gravel (0.1 - 4 dia) | Not present/Negligible | Assumes well established and maintained condition |
| Cobble (4 - 10 dia) | Not present/Negligible | Assumes well established and maintained condition |
| Rocks (10 - 24 dia) | Not present/Negligible | Assumes well established and maintained condition |
| Boulders (>24 dia) | Not present/Negligible | Assumes well established and maintained condition |
| Bedrock | Not present/Negligible | Assumes well established and maintained condition |
| Man-made pervious/porous surface | >90% | Assumes well established and maintained condition |
| Man-made impervious surface | Not present/Negligible | Assumes well established and maintained condition |
| Unknown/Other | Not present/Negligible | Assumes well established and maintained condition |
| What percent of the map unit contains microtopography? | Not present/Negligible | Assumes well established and maintained condition |
| What percent of the map unit's area is made up of depressional areas (areas greater than 6 inches in depth relative to surrounding surface)? | Not present/Negligible | Unique to every map unit |
| What is the slope (gradient) of the map unit? Select the predominant slope where multiple slopes are present. | <3% | Unique to every map unit |
| If <3% (1-2 degrees) is selected AND the map has flowing water (i.e., stream or river), then select one of the following. If flowing water is NOT present, select 1-2% (1-1.5 degrees). | 1-2% | Unique to every map unit |
| If there is a predominant slope, what is the longest length of the map unit along the fall-line? | 20-30' | Unique to every map unit |
| How permeable is the soil? | None of the above | Assumes well established and maintained condition |
| Does the map unit become saturated or inundated over the course of a normal year? | No | Unique to every map unit |
| If the map unit is saturated or inundated during the course of a normal year, is the saturation or inundation occasional, seasonal, or permanent? | None | Unique to every map unit |
| If the map unit is saturated or inundated during the course of a normal year, what percent of the map unit is affected by saturation or inundation (this may be based on local knowledge of the site)? | Not present/Negligible | Unique to every map unit |
| If the map unit is saturated or inundated during the course of a normal year, what is the salinity regime? | None | Unique to every map unit |
| If the map unit is saturated or inundated during the course of a normal year, what type of water motion is present? | None | Unique to every map unit |
| What is the average bankfull width for the map unit? | 0 | Does not typically apply to this habitat type |
| What is the average bankfull height for the map unit? | 0 | Does not typically apply to this habitat type |
| What is the average Ordinary High Water (OHW) width for the map unit? | 0 | Does not typically apply to this habitat type |
| What is the average height to Ordinary High Water (OHW) for the map unit? | 0 | Does not typically apply to this habitat type |
| Is the map unit within a low, medium, or high sinuosity (degree of curve or bend) system? | NA | Does not typically apply to this habitat type |
| What is your level of certainty for the stream dimension measurements? | NA | Does not typically apply to this habitat type |
| What percent of the map unit contains open water that is free of vegetation or other obstructions? | Not present/Negligible | Does not typically apply to this habitat type |
| When water is present, what is the predominant depth? | Not present | Does not typically apply to this habitat type |
| What area of the map unit is made up of, or affected by, a seep or spring? | No seep or spring present | Does not typically apply to this habitat type |
| Are surface sheens (iridescent or rainbow-like films) present? | No | Unique to every map unit |
| Are the surface sheens natural (from bacteria) or unknown? | NA | Unique to every map unit |
| Is the map unit adjacent to a developed area (industrial plant, road, ag. field, etc.)? | Yes | Unique to every map unit |
| Is the map unit adjacent to areas of permanent open water? | No | Unique to every map unit |
| What direction is the center of the map unit from the adjacent open water area? Select all that apply. | NA | Unique to every map unit |
| What percent of the map unit shows evidence of any type of recent manmade VEGETATION disturbance? | Not present/Negligible | Unique to every map unit |
| What percent of the map unit shows evidence of manmade SOIL disturbance? | <10% | Unique to every map unit |
| Of the disturbed area, what percent of the soil disturbance is due to compaction (from vehicle traffic, construction, agriculture, etc.)? | <10% | Unique to every map unit |
| Of the disturbed area, what percent of the soil disturbance is due to conventional tillage practices or comprised of over-turned (bladed) soil? | Not present/Negligible | Unique to every map unit |
| What is the relative elevation of the map unit? That is, is it higher or lower than surrounding map units? | Lower | Unique to every map unit |
| On average, what is the height difference from surrounding map units (difference from ground level)? | < 7' | Unique to every map unit |
| What is the degree of screening provided by foliage within the map unit? Assume that this is being estimated at a time when leaves are present. | Bare | Assumes well established and maintained condition |
