Rationale
LUTEN was designed to provide the data necessary to identify simple parameters that can be used to characterise the thermal conditions in river reaches. These parameters are of importance to the management of rivers, particularly in the context of climate change and rising water temperatures. Some parameters have already been identified and more information can be found at the catchment controls link in the navigation bar to the right.
 
Methods
The LUTEN network has been running since March 2011 and consists of 40 sites in the River Dove and Manifold, Peak District National Park, UK. In 2013, the network was rationalised leaving 20 sites active. At active sites, Gemini Aquatic 2 Tinytag sensors are deployed to record the maximum, minimum and mean temperature every 15-minutes. At each site, one Tinytag is placed in a tree to record air temperature and a second is placed underwater on the river bed to measure water temperature. In addition, water chemistry and spot temperature measurements are regularly taken throughout the network, including in groundwater springs. A field-validated landscape model has also been developed, which allows measurements of catchment characteristics to be related to temperature records.
 

Location
The Rivers Dove and Manifold are situated in the Peak District National Park, UK. The catchments are adjacent and have similar meteorological conditions, including average annual precipitation in excess of 1000 mm/yr.  The rivers are ideal case studies because, despite their close proximity, they have substantially different hydrological regimes due to the regional geology. The River Dove flows parallel to, and eventually through, a Carboniferous limestone outcrop (shown in grey on the map to the right) with subsurface drainage and substantial groundwater inputs. Alternatively, the Manifold flows over Millstone Grit with a dense drainage network of surface tributaries. Both catchments are predominantly grazed agricultural grassland. Woodland covers approximately 5% of the catchment. The lower 10 km of the River Dove is impacted by numerous small weirs. More information about individual monitoring sites can be found at the LUTEN sites page.

Data availability
We are happy to share our data with others. Summary data can be viewed at the LUTEN sites link to the right. For access to higher resolution data, or other data we collect, please contact Rob Wilby (R.L.Wilby@lboro.ac.uk) or Matt Johnson (M.Johnson@nottingham.ac.uk).

Upstream of site D18

 

A time-series of air temperature, water temperature at site D22 and the temperature of water in groundwater springs over one month.

 A map of the River Dove and Manifold catchments. Differences in drainage network are due to a limestone outcrop in the Dove catchment (shown in grey in the above image).