Within-reach temperature heterogeneity is limited in a southern Appalachian stream network, southeastern USA

Stream temperature monitoring networks, combined with geospatial data and statistical modeling, facilitate temperature mapping at the spatial resolution of inter-confluence stream reaches and at continental spatial extents. Comparatively few monitoring efforts quantify spatiotemporal temperature heterogeneity within inter-confluence stream reaches. We measured within-reach temperature heterogeneity for six study reaches in a southern Appalachian stream network, southeastern USA. Within each reach, we logged temperature at 27 monitoring points every 15 minutes for three days during early summer and three days during late summer of 2018. Analysis of variance indicated that daily minimum, mean, and maximum water temperature metrics vary more among reaches than within reaches. For example, the difference in daily mean temperature from the warmest to coldest reach was 8.7°C, whereas within-reach variation never exceeded 2.3°C for any of the three daily temperature metrics. Mixed effects mode..., , # Data from: Within-reach temperature heterogeneity is limited in a southern Appalachian stream network, southeastern USA

Dataset DOI: [10.5061/dryad.931zcrjx9](10.5061/dryad.931zcrjx9)

## Description of the data and file structure

These files include (1) stream temperature monitoring data from the Little River watershed (Blount County, Tennessee) and (2) associated geographic and environmental variables describing the monitoring locations.

### Files and variables

#### File:

#### site_env_v01.csv

**Description:** 

##### Variables

* COMID: Unique flowline ID from National Hydrography Dataset (NHD).
* lon: Longitude in decimal degrees.
* lat: Latitude in decimal degrees.
* reach: One of six reach name abbreviations.
* transect: One of nine transect numbers.
* point: One of three point numbers, or alternative air temperature monitoring point.
* period: Early or late summer monitoring period denoted 1 or 2, respectively.
* attach: Method of logger attachment in stream.
* bank: Abbr...,