Predicting water temperatures using a deterministic model : Application on Miramichi River catchments (New Brunswick, Canada)

Summary Water temperature influences many physical, chemical and biological properties of rivers. It also influences the distribution of fish and many aquatic organisms within the river environment. Hence, a good understanding of the thermal regime of rivers is essential for effective management of fisheries and aquatic resources. This study deals with the modelling of river water temperature using a deterministic model. This model calculates the net heat flux at the water surface using meteorological conditions within the study area. The water temperature model was applied on two watercourses of different size and thermal characteristics, but within a similar meteorological region, i.e. the Little Southwest Miramichi River and Catamaran Brook (New Brunswick, Canada). Data from 1992 to 1994 were used to calibrate the model, while data from 1995 to 1999 were used for the model validation. Results showed equally good agreement between observed and predicted water temperatures during the calibration period for both rivers with a root-mean-square error (RMSE) of 1.49 °C for the Little Southwest Miramichi River compared to 1.51 °C for Catamaran brook. During the validation period, RMSEs were calculated at 1.55 °C for the Little Southwest Miramichi River and 1.61 °C for Catamaran Brook. Poorer model performances were generally observed early in the season (e.g. spring), especially for the Little Southwest Miramichi River due to the influence of snowmelt conditions, while late summer to autumn performances showed among the best results for both rivers. Late autumn performances were more variable in Catamaran Brook and presumably influenced by the groundwater, geothermal conditions and potentially riparian shading. The geothermal aspect was further investigated at Catamaran Brook (using 1998 data) and results revealed that although geothermal fluxes are present, they explained very little of the unexplained variability (

[1]  E. M. P. Chadwick,et al.  Water, science, and the public : the Miramichi ecosystem , 1995 .

[2]  A. G. Huntsman.  Death of Salmon and Trout with High Temperature , 1942 .

[3]  E. Jeppesen,et al.  Two simple models for estimating daily mean water temperatures and diel variations in a Danish low gradient stream , 1987 .

[4]  Mysore G. Satish,et al.  Modelling of maximum daily water temperatures in a small stream using air temperatures , 2001 .

[5]  Y. Zhang,et al.  SPATIAL AND SEASONAL VARIABILITY IN THE COMPONENTS OF THE RIVER HEAT BUDGET , 1997 .

[6]  J. M. Raphael.  Prediction of Temperature in Rivers and Reservoirs , 1962 .

[7]  Daniel Caissie,et al.  Variation in stream water chemistry and hydrograph separation in a small drainage basin , 1996 .

[8]  George W. Brown,et al.  Predicting Temperatures of Small Streams , 1969 .

[9]  M. Ladle,et al.  Microthermal gradients and ecological implications in Dorset rivers , 1999 .

[10]  D. T. Crisp,et al.  Effect of air temperature upon mean water temperature in streams in the north Pennines and English Lake District , 1982 .

[11]  J. Ward.  Thermal characteristics of running waters , 1985, Hydrobiologia.

[12]  Heinz G. Stefan,et al.  Extreme value analysis of a fish/temperature field database , 1995 .

[13]  W. Grenney,et al.  Heat transfer processes in the bed of a small stream , 1977 .

[14]  J. Nash,et al.  River flow forecasting through conceptual models part I — A discussion of principles☆ , 1970 .

[15]  D. Caissie,et al.  The effects of environmental heat stress on heat-shock mRNA and protein expression in Miramichi Atlantic salmon (Salmo salar) parr , 2002 .

[16]  André St-Hilaire,et al.  Water temperature modelling in a small forested stream: implication of forest canopy and soil temperature , 2000 .

[17]  Raymond M. Lee,et al.  Critical Thermal Maxima of Five Trout Species in the Southwestern United States , 1980 .

[18]  Guy Morin,et al.  Prévision des températures de l'eau en rivières à l'aide d'un modèle conceptuel : le cas de la rivière Moisie , 1994 .

[19]  G. W. Brown.  Predicting the effect of clearcutting on stream temperature. , 1970 .

[20]  K. Smith.  WATER TEMPERATURE VARIATIONS WITHIN A MAJOR RIVER SYSTEM , 1975 .

[21]  John S. Gulliver,et al.  In-stream flow impact on river water temperatures , 2000 .

[22]  D. Cluis,et al.  RELATIONSHIP BETWEEN STREAM WATER TEMPERATURE AND AMBIENT AIR TEMPERATURE , 1972 .

[23]  N. Marcotte,et al.  Le calcul de la temprature de l'eau des rivires , 1973 .

[24]  Bernard A. Engel,et al.  Stream Temperature Dynamics in Upland Agricultural Watersheds , 2000 .

[25]  André St-Hilaire,et al.  Stochastic modelling of water temperatures in a small stream using air to water relations , 1998 .

[26]  Heinz G. Stefan,et al.  LINEAR AIR/WATER TEMPERATURE CORRELATIONS FOR STREAMS DURING OPEN WATER PERIODS , 2000 .

[27]  P. Heuberger,et al.  Calibration of process-oriented models , 1995 .

[28]  Heinz G. Stefan,et al.  Stream temperature dynamics: Measurements and modeling , 1993 .

[29]  Heinz G. Stefan,et al.  Stream temperature/air temperature relationship : a physical interpretation , 1999 .

[30]  Heinz G. Stefan,et al.  Riverbed heat conduction prediction , 1994 .

[31]  Heinz G. Stefan,et al.  A nonlinear regression model for weekly stream temperatures , 1998 .

[32]  M. Gordon Wolman,et al.  Fluvial Processes in Geomorphology , 1965 .

[33]  Heinz G. Stefan,et al.  STREAM TEMPERATURE ESTIMATION FROM AIR TEMPERATURE , 1993 .

[34]  G. Morin,et al.  Comparaison des performances relatives à un modèle déterministe et à un modèle stochastique de température de l'eau en rivière , 1986 .

[35]  Mysore G. Satish,et al.  Predicting river water temperatures using the equilibrium temperature concept with application on Miramichi River catchments (New Brunswick, Canada) , 2005 .

[36]  Laurel Saito,et al.  Predicting the effects of shade on water temperature in small streams , 1997 .

[37]  Stream Water-Temperature Sensitivity to Weather and Bed Parameters , 1994 .