The French league had different values at different times: 10 000, 12 000, 13 200 and 14 400 French feet, about 3.25 km to about 4.68 km. It was used for a while together with the metric system but it is not used now. The nautical league was three nautical miles.
Why does precipitation fall mainly on the windward side of a mountain? When humid winds blow from the oceans toward mountains they must rise up to pass over the mountains. The rising warm air cools when it rises and its water vapor condenses, forming clouds rain or snow falls on the windward side of the mountain. microclimate Climate within a small area that differs significantly from the climate of the surrounding area
Orographic precipitation, also known as relief precipitation, is precipitation generated by a forced upward movement of air upon encountering a physiographic upland (see anabatic wind).This lifting can be caused by two mechanisms:1  The upward deflection of large scale horizontal flow by the orography.n orographic map of Eastern Siberia from 1875 by Peter Kropotkin. Orography (from the Greek ÏÏÎ¿Ï, hill, Î³ÏÎ±ÏÎ¯Î±, to write) is the study of the topographic relief of mountains, and can more broadly include hills, and any part of a region's elevated terrain.