Disadvantages of Underground Transmission over Overhead Transmission. 1  Underground transmission line cable is costlier than overhead transmission. 2  The maintenance cost of underground cables is higher than over head transmission. 3  Capital cost of Overhead Transmission lines are cheaper than underground transmission line.
the average annual rainfall for Canada is 60.33 cm. That is alot! Any average is going to be a meaningless because Canada covers over 9 million sq/kms, extending from the Nor â¦ th Pole to below the 49th parallel and both east and west coasts of North America.
The Climate in Canada Canada is often associated with cold weather and snow, but in reality, its climate is as diverse as its landscape. Generally, Canadians enjoy four very distinct seasons, particularly in the more populated regions along the US border. Daytime summer temperatures can rise to 35Â°C and higher, while lows of -25Â°C are not uncommon in winter. More moderate temperatures are the norm in spring and fall. Summers can be hot and dry on the prairies, humid in central Canada, and milder on the coasts. Spring is generally pleasant across the country.