Sensitivity analysis of a deterministic water temperature model to forest canopy and soil temperature in Catamaran Brook (New Brunswick, Canada)

2003 ◽  
Vol 17 (10) ◽  
pp. 2033-2047 ◽  
Author(s):  
Andr� St-Hilaire ◽  
Nassir El-Jabi ◽  
Daniel Caissie ◽  
Guy Morin
Keyword(s):  
Sensitivity Analysis ◽  
New Brunswick ◽  
Soil Temperature ◽  
Water Temperature ◽  
Forest Canopy ◽  
Temperature Model

Water temperature modelling in a small forested stream: implication of forest canopy and soil temperature

2000 ◽  
Vol 27 (6) ◽  
pp. 1095-1108 ◽  
Author(s):  
André St-Hilaire ◽  
Guy Morin ◽  
Nassir El-Jabi ◽  
Daniel Caissie
Keyword(s):  
Soil Temperature ◽  
Water Temperature ◽  
Forest Canopy ◽  
Deterministic Model ◽  
Heat Budget ◽  
Original Model ◽  
Small Catchment ◽  
Negative Exponential Function ◽  
Modified Model ◽  
Crown Closure

The demand for comprehensive environmental assessment of river ecosystem has increased for engineers and scientists. Accurate and versatile water temperature models are required to meet this demand. A number of hydrological models take vegetation and soil characteristics into account, but very few temperature models do. The objective of this paper is to incorporate soil temperature and vegetation as input variables in a deterministic heat budget model. The CEQUEAU hydrological and water temperature model was used to simulate water temperature in Catamaran Brook, a small catchment located in central New Brunswick. The model was modified by incorporating soil temperature as a parameter influencing the temperature of interflow, using the so-called force-restore method. Crown closure was also incorporated in the model as a factor influencing locally advected water using a negative exponential function. The modified model simulated daily water temperatures better than the original model. Root-mean-square error for a period of 5 years decreased from 2.10°C with the original model to 1.77°C with the modified model. Nash coefficient increased from 0.78 with the original model to 0.82 with the modified model. An analysis of residuals showed that the modified model is sensitive to additional parameters such as crown closure, especially for short time scales during periods of higher discharge and during extreme meteorological and hydrological events such as tropical storms.Key words: stream temperature, hydrology, deterministic model, CEQUEAU, forestry.

scholarly journals A Stochastic Harmonic Oscillator Temperature Model for the Valuation of Weather Derivatives

Mathematics ◽  
2021 ◽  
Vol 9 (22) ◽  
pp. 2890
Author(s):  
Alessio Giorgini ◽  
Rogemar S. Mamon ◽  
Marianito R. Rodrigo
Keyword(s):  
Sensitivity Analysis ◽  
Parameter Estimation ◽  
Harmonic Oscillator ◽  
Numerical Simulations ◽  
Model Parameters ◽  
Call Option ◽  
Temperature Model ◽  
Option Prices ◽  
Harmonic Oscillator Model ◽  
Temperature Dynamics

Stochastic processes are employed in this paper to capture the evolution of daily mean temperatures, with the goal of pricing temperature-based weather options. A stochastic harmonic oscillator model is proposed for the temperature dynamics and results of numerical simulations and parameter estimation are presented. The temperature model is used to price a one-month call option and a sensitivity analysis is undertaken to examine how call option prices are affected when the model parameters are varied.

scholarly journals Development and validation of a drinking water temperature model in domestic drinking water supply systems

2017 ◽  
Vol 14 (10) ◽  
pp. 1031-1037 ◽  
Author(s):  
Ljiljana Zlatanovic ◽  
Andreas Moerman ◽  
Jan Peter van der Hoek ◽  
Jan Vreeburg ◽  
Mirjam Blokker
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Water Temperature ◽  
Drinking Water Supply ◽  
Water Supply Systems ◽  
Temperature Model ◽  
Development And Validation ◽  
Supply Systems

Prévision des températures de l'eau en rivières à l'aide d'un modèle conceptuel : le cas de la rivière Moisie

1994 ◽  
Vol 21 (1) ◽  
pp. 63-75 ◽  
Author(s):  
Guy Morin ◽  
Tonino-Joseph Nzakimuena ◽  
Wanda Sochanski
Keyword(s):  
Solar Radiation ◽  
Water Temperature ◽  
Energy Budget ◽  
Production Capacity ◽  
Short Wave ◽  
Wave Radiation ◽  
Temperature Model ◽  
Salmon River ◽  
Daily Data ◽  
Temperature Impacts

Hydro-Québec is projecting to increase the hydroelectric production capacity of the St. Marguerite River by diversion of the tributaries Pékans and Carheil rivers of the Moisie River, the most productive salmon river of the whole Quebec. Along with substantial changes in hydrological regimes, this hydroelectric development is most likely to affect some physical environment factors such as the water temperature, which is of prime importance for the biotope and, in particular, for the salmon productivity. The objective of the present study is to simulate, over a long period of time, the river water temperatures under natural conditions as compare to those after the impoundment, to assess the consequences of the tributary diversion. We used the hydrological CEQUEAU model coupled with a temperature model.The temperature model developed is applicable to the ice-free period and calculates daily water temperatures in rivers by computing an energy budget to each element of the watershed. The energy budget considers the short-wave solar radiation, long-wave radiation, evaporation, and convection in the air as well as the advective heat of various inflows from surface runoff, interflow, and groundwaters. The estimation of the atmospheric thermal exchanges is based on the equations usually found in literature. The volumes of the various inflows are given by the hydrological model. The temperature model uses daily data for air temperature and monthly data for solar radiation, cloudiness, wind speed, and vapour pressure.The model has been applied to the Moisie River (Québec), using the measured values for the calibration. Both observed and calculated values show good agreement. The model was also used to simulate, over the whole watershed, the water temperatures for the 1961–1989 period and after the diversion. The results show that the tributary diversion contributed to increase the water temperature of the Moisie River and that this increase is gradually attenuated as we progress downstream. Key words: temperature, impacts, model, Moisie, Québec, diversion, hydrology.

Soil Temperature Model for CERES and Similar Crop Models

1993 ◽  
Vol 170 (1) ◽  
pp. 56-65 ◽  
Author(s):  
F. Hoffmann ◽  
R. Beinhauer ◽  
F. Dadoun
Keyword(s):  
Soil Temperature ◽  
Temperature Model ◽  
Crop Models
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