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Earth System Science Data The Data Publishing Journal
https://doi.org/10.5194/essd-2017-57
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Peer-reviewed comment
30 Jun 2017
Review status
This discussion paper is under review for the journal Earth System Science Data (ESSD).
Long-term weather, hydrometric, and water chemistry datasets in high-temporal resolution at the La Salle River watershed in Manitoba, Canada
Marcos R. C. Cordeiro1, Jason A. Vanrobaeys2, and Henry F. Wilson3 1Science and Technology Branch, Agriculture and Agri-Food Canada, 200-303 Main Street, Winnipeg, MB, R3C 3G7
2Science and Technology Branch, Agriculture and Agri-Food Canada, 101 Route 100, Morden, MB, R6M 1Y5
3Science and Technology Branch, Agriculture and Agri-Food Canada, 2701 Grand Valley Rd., Brandon, MB, R7A 5Y3
Abstract. Lack of long-term datasets in fine temporal resolution hinders environmental studies and modelling efforts; to address this issue in the La Salle River watershed, in Canada, long-term weather (1990–2013), hydrometric (1990–2013 except years with no or poor data), and water chemistry (2009–2013) datasets were developed. The weather variables consisted of temperature, relative humidity, wind speed, solar radiation, and precipitation in an hourly time-step, which is required for physically-based modelling. The only hydrometric variable included in the dataset was stream discharge in a daily time-step, which is the usual time-frame for summarizing the results of long-term studies. The water chemistry data consisted of total nitrogen (TN), total dissolved nitrogen (TDN), total phosphorus (TP) and total dissolved phosphorus (TDP). Samples were collected weekly during the open water season at the same site as they hydrometric gauging station (05OG008) starting in August 2009 until October 2012 with some gaps (i.e. Fall 2011, Spring 2012, September 2012). In 2013 the frequency of sampling was increased to daily or sub-daily during high stream discharge and weekly during low stream discharge. An overview of the data indicates that values and trends are within ranges reported in the literature for the region. Mean annual, winter, and summer temperatures were 3.5 °C–10.7 °C and 17.2 °C, respectively. Annual relative humidity averaged 73.1 % but tended to be higher and more homogenous in cold seasons. Wind speed was very similar over the different seasons with annual average of 4.3 m/s. Solar radiation followed the typical curve reported for western Canada, with peak daily average values around 250 W/m2 in July. The precipitation records were mostly comprised of dry hours and the characteristic precipitation pattern of the Canadian Prairies with high frequency of small precipitation events as observed, with 75.3 % of the hourly precipitation being equal or less than 2 mm/h. The hydrometric characteristics of the dataset were also typical of the Canadian Prairies; the average peak discharge over the entire period was larger in April (2.3 m3/s) due to large amounts of snowmelt runoff. The average concentrations of TN, TDN, TP and TDP of 1.54, 1.35, 0.56, and 0.49 mg/L, respectively, were in agreement with values found in previous studies at the same location. The datasets for weather (https://doi.org/10.23684/ODI-2017-00957), discharge (https://doi.org/10.23684/ODI-2017-00959) and water chemistry (https://doi.org/10.23684/ODI-2017-00958) are accessible through the Government of Canada's Open Data portal (http://open.canada.ca).

Citation: Cordeiro, M. R. C., Vanrobaeys, J. A., and Wilson, H. F.: Long-term weather, hydrometric, and water chemistry datasets in high-temporal resolution at the La Salle River watershed in Manitoba, Canada, Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2017-57, in review, 2017.
Marcos R. C. Cordeiro et al.
Marcos R. C. Cordeiro et al.

Data sets

La Salle River Watershed 05OG008 Hourly Weather 1990 to 2013
M. R. C. Cordeiro, J. A. Vanrobaeys, and H. F. Wilson
https://doi.org/10.23684/ODI-2017-00957
La Salle River Near Elie 05OG008 Daily Discharge 1990 – 2013
M. R. C. Cordeiro, J. A. Vanrobaeys, and H. F. Wilson
https://doi.org/10.23684/ODI-2017-00959
La Salle River 05OG008 Water Chemistry 2009 – 2015
M. R. C. Cordeiro, J. A. Vanrobaeys, and H. F. Wilson
https://doi.org/10.23684/ODI-2017-00958
Marcos R. C. Cordeiro et al.

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Short summary
The research, conducted in Manitoba, Canada, involved the development of datasets for hydrological modelling applications. The datasets included weather, hydrometric and water chemistry variables required to run models at an hourly time-step and assess their predictive performance for stream flow and water quality. The data and methods developed will be useful for other hydrological assessments and modelling studies in this region and in similar landscapes and climates around the world.
The research, conducted in Manitoba, Canada, involved the development of datasets for...
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