MiddleFork04.ssn: MiddleFork04.ssn: Middle Fork 2004 stream temperature dataset

In SSN2: Spatial Modeling on Stream Networks

MiddleFork04.ssn: Middle Fork 2004 stream temperature dataset

Description

The MiddleFork04.ssn data folder contains the spatial, attribute, and topological information needed to construct an SSN object using the SSN2 package.

Details

The MiddleFork04.ssn folder contains five shapefiles:

• edges: polyline shapefile representing the stream network

• sites: point shapefile representing the observed site locations

• pred1km: point shapefile representing prediction site locations at approximately 1km intervals throughout the stream network

• Knapp: point shapefile representing prediction site locations on the Knapp River

• CapeHorn: point shapefile representing prediction site locations on the Cape Horn River

The MiddleFork04.ssn includes one text file, netID1.txt, which contains the topological information for the stream network in the Middle Fork 2004 dataset.

The distance folder contains four folders that store the hydrologic distance matrices for each of the point shapefiles (obs, CapeHorn, Knapp, and pred1km). See ssn_create_distmat() for a detailed description of the distance matrix file structure.

Attribute data is also stored within each of the spatial datasets. The column names are defined as follows:

edges:

• COMID: Common identifier of an NHD feature or relationship

• GNIS_Name: Feature name as found in the Geographic Names Information System

• REACHCODE: Unique identifier for a reach. The first 8 digits contain the identfier for the HUC8 and the last 6 digits are a unique within-HUC8 identifier for the reach

• FTYPE: three-digit integer used to classify hydrography features in the NHD and define subtypes

• FCODE: Numeric code that contains the feature type and its attributes as found in the NHDFCode lookup table

• CDRAINAG: Cumulative drainage area (km2) for the lowermost location on the edge

• AREAWTMAP: Area weighted mean annual precipitation (mm) at the lowermost location on the edge

• SLOPE: Slope of the edge (cm/cm)

• h2oAreaKm2: Watershed area (km2) for the lowermost location on the line segment

• rid: Reach identifier

• areaPI: Segment proportional influence value, calculated using watershed area (h2oAreaKm2)

• afvArea: Additive function value, calculated using areaPI

• upDist: Distance from the stream outlet (most downstream location in the the stream network) to the uppermost location on the line segment

• Length: Length of line segment (m)

• netID: Network identifier

sites:

• STREAMNAME: Stream name

• COMID: Common identifier of an NHD feature or relationship

• CDRAINAG: Cumulative drainage area (km2)

• AREAWTMAP: Area weighted mean annual precipitation (mm) at lowermost location on the line segment where the site resides

• SLOPE: Slope of the line segment (cm/cm) where the site resides

• ELEV_DEM: Elevation at the site based on a 30m DEM

• Source: Source of the data - relates to the ID field of the source table

• Summer_mn: Overall summer mean termperature (C) of the deployment

• MaxOver20: Binary variable: 1 represents the maximum summer temperature was greater than 20C and 0 indicates that it was less than 20C

• C16: Number of times daily stream temperature exceeded 16C

• C20: Number of times daily stream temperature exceeded 20C

• C24: Number of times daily stream temperature exceeded 24C

• FlowCMS: Average stream flow (cubic meters per sec) for August, by year, from 1950-2010 across 9 USGS gauges in the region

• AirMEANc: Average mean air temperature (C) from July 15 - August 31, from 1980-2009 across 10 COOP air stations within the domain

• AirMWMTc: Average maximum air temperature (C) from July 15 - August 31, from 1980-2009 across 10 COOP air stations within the domain. MWMT = maximum 7-day moving average of the maximum daily temperature (i.e. maximum of all the 7-day maximums)

• NEAR_X: x coordinate

• NEAR_Y: y coordinate

• rid: Reach identifier of the edge the site resides on

• ratio: Site ratio value; provides the proportional distance along the edge to the site location

• upDist: Distance upstream from the stream outlet (m)

• afvArea: Additive function value calculated using waterhsed area (h2oAreaKm2)

• locID: Location identifier

• netID: Stream network identifier

• pid: Point identifier

pred1km, CapeHorn, and Knapp:

• COMID: Common identifier of an NHD feature or relationship

• GNIS_Name: Feature name of the edge the site resides on, as found in the Geographic Names Information System

• CDRAINAG: Cumulative drainage area (km2)

• AREAWTMAP: Area weighted mean annual precipitation (mm) at lowermost location on the line segment where the site resides

• SLOPE: Slope of the line segment (cm/cm) where the site resides

• ELEV_DEM: Elevation at the site based on a 30m DEM

• NEAR_X: x coordinate

• NEAR_Y: y coordinate

• rid: Reach identifier of the edge the site resides on

• ratio: Site ratio value; provides the proportional distance along the edge to the site location

• upDist: Distance upstream from the stream outlet (m)

• afvArea: Additive function value calculated using watershed area (h2oAreaKm2)

• locID: Location identifier

• netID: Stream network identifier

• pid: Point identifier

• FlowCMS: Average stream flow (cubic meters per sec) for August, by year, from 1950-2010 across 9 USGS gauges in the region

• AirMEANc: Average mean air temperature (C) from July 15 - August 31, from 1980-2009 across 10 COOP air stations within the domain

• AirMWMTc: Average maximum air temperature (C) from July 15 - August 31, from 1980-2009 across 10 COOP air stations within the domain. MWMT = maximum 7-day moving average of the maximum daily temperature(i.e. maximum of all the 7-day maximums)

Source

edges are a modified version of the United States National Hydrography Dataset (http://nhd.usgs.gov/). sites, pred1km, CapeHorn and Knapp are unpublished United States Forest Service data.

See Also

mf04p for the Middle For 04 data as an SSN object.

SSN2 documentation built on May 29, 2024, 4:41 a.m.