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.
As the worldâs second largest country, Canadaâs geography changes significantly depending on which part you are in. And with the differences in each region, there is a very different accompanying landscape and climate. In almost every part of Canada there are lakes and rivers. Canada has over 2 million lakes covering 7% of the land mass. The largest lake is the Northwest Territoriesâ Great Bear Lake. It is estimated that Canada is home to one-seventh of the worldâs fresh water. Canada has a land mass of 9,970,610 square kilometers and occupies the northern half of North America. From east to west, Canada encompasses six time zones.