Comparison of BOREAS and Atmospheric Environment Service humidity sensors at Meadow Lake, Saskatchewan

1997 ◽  
Vol 102 (D24) ◽  
pp. 28911-28913 ◽  
Author(s):  
Alan K. Betts ◽  
John H. Ball ◽  
Brett J. Smith ◽  
Stanley R. Shewchuk
Keyword(s):  
Atmospheric Environment ◽  
Humidity Sensors ◽  
Environment Service

Optimal rainfall temporal patterns for urban drainage design in the context of climate change

2010 ◽  
Vol 62 (5) ◽  
pp. 1170-1176 ◽  
Author(s):  
V.-T.-V. Nguyen ◽  
N. Desramaut ◽  
T.-D. Nguyen
Keyword(s):  
Climate Change ◽  
Extreme Value Distribution ◽  
Climate Change Impacts ◽  
Atmospheric Environment ◽  
Systematic Evaluation ◽  
Accurate Estimation ◽  
Urban Drainage ◽  
Design Storm ◽  
Drainage Design ◽  
Environment Service

The main objective of the present study is to propose a method for estimating an optimal temporal storm pattern for urban drainage design in southern Quebec (Canada) in the context of climate change. Following a systematic evaluation of the performance of eight popular design storm models for different typical urban basins, it was found that the Canadian Atmospheric Environment Service (AES) storm pattern and the Desbordes model (with a peak intensity duration of 30 min) were the most accurate for estimating runoff peak flows while the Watt model gave the best estimation of runoff volumes. Based on these analyses, an optimal storm pattern was derived for southern Quebec region. The proposed storm pattern was found to be the most suitable for urban drainage design in southern Quebec since it could provide accurate estimation of both runoff peak flow and volume. Finally, a spatial-temporal downscaling method, based on a combination of the spatial statistical downscaling SDSM technique and the temporal scaling General Extreme Value distribution, was used to assess the climate change impacts on the proposed optimal design storm pattern and the resulting runoff properties.

The 1976-1977 Drought Situation in Ontario

1979 ◽  
Vol 55 (3) ◽  
pp. 91-94 ◽  
Author(s):  
B. J. Stocks
Keyword(s):  
Natural Resources ◽  
Forest Fire ◽  
Reliable Method ◽  
Task Force ◽  
Atmospheric Environment ◽  
Fire Control ◽  
University Of Toronto ◽  
Environment Service

The recent drought situation in Ontario was investigated, from a forest fire control standpoint, by a task force consisting of Canadian Forestry Service, Ontario Ministry of Natural Resources, Atmospheric Environment Service and University of Toronto representatives. Results indicate that monitoring of precipitation alone is not a reliable method of establishing the duration and severity of droughts.

The atmospheric environment service regional ice model (RIM) for operational applications

1988 ◽  
Vol 12 (2) ◽  
pp. 135-153 ◽  
Author(s):  
V. R. Neralla ◽  
R. G. Jessup ◽  
S. Venkatesh
Keyword(s):  
Atmospheric Environment ◽  
Environment Service ◽  
Ice Model

Water and Chemical Budgets for Terrestrial Basins at the Turkey Lakes Watershed

1988 ◽  
Vol 45 (S1) ◽  
pp. s88-s95 ◽  
Author(s):  
J. A. Nicolson
Keyword(s):  
Lake Superior ◽  
Terrestrial Ecosystem ◽  
High Elevation ◽  
Atmospheric Environment ◽  
Chemical Parameters ◽  
Annual Streamflow ◽  
Terrestrial System ◽  
Turkey Lakes Watershed ◽  
Environment Service ◽  
Basin Elevation

Twenty terrestrial basins ranging in area from 2.3 to 62.7 ha were monitored in the 1050-ha Turkey Lakes Watershed (TLW) to measure discharge and ion loss from the terrestrial ecosystem and to estimate terrestrial contributions to the main aquatic system. These basins span 400 m of elevation, beginning at 60 m above Lake Superior (183 m a.s.l.). Annual streamflow represented 28–63% of precipitation; 30–60% of the total occurred during springmelt. Water, H+, and NH4+ output of the small basins increased with basin elevation; conductivity, alkalinity, Ca2+, and NO3− decreased. Losses of Mg2+, K+, Na+, SO42−, and Cl− were not related to basin elevation. Input–output values indicate a net loss of Ca2+, Mg2+, K+, and Na+; Cl− slowly accumulated, N was strongly retained, and SO42− was generally in balance. Alkalinity values indicate that HCO3− was important in balancing cation losses in low-elevation basins but that SO42− dominated in high-elevation basins. Output of H+ was substantially lower than its input through precipitation at ail elevations; however, H+ removal by the terrestrial system was greater in low-elevation than in high-elevation basins within the main watershed. Precipitation quantity and SO42− and NO3− input were measured at the Atmospheric Environment Service APN station southeast of the TLW; other chemical parameters were measured on samples collected near the main outlet on the west side of the TLW.

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