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A natural boundary is formed with natural geographic features, such as mountain ranges and rivers. They often become political boundaries. However, political boundaries are boundaries between countries, and they do not really care about natural geographic features, like mountain ranges. They just draw out in the land by politicians.
Rivers, mountain ranges, oceans, etc. Those are considered "natural boundaries".
the toposheet is the real picture of map and toposheet reflect in the map
rivers and lakes
Gravity & Barometric Pressure respectively. The greater the difference in temperature or pressure between two areas, the stronger the winds that blow between them will be.
canals are man made waterways, rivers are natural waterways
Canals are man made. Rivers are natural.
Canals are channels of water which people have made. Rivers are natural watercourses. Their course may be altered by people for various reasons but they are essentially natural.
Canals were important to ancient china because between the Huang He and the Chang Jiang rivers, there was no natural means of transportation and so canals were key for trading and farming.
perennial canals : They are linked to dams and barrages to provide water throughout the year and they irrigate a vast area.Inundation canals : long canals taken off from large rivers are called inundation canals. They receive water when the river is high enough and especially when it is in flood
Canals are human constructed 'short cuts' or direct routes between natural rivers and/or lakes. The main purpose was to transport goods and produce.
Natural features are those formed naturally - these include rivers, bays, mountains, islands, monoliths, etc. Man-made features are those formed by man's intervention - these include any buildings, roadways, bridges, canals, etc.
Canals are human constructed 'short cuts' or direct routes between natural rivers and/or lakes. The main purpose was to transport goods and produce.
perennial canals : They are linked to dams and barrages to provide water throughout the year and they irrigate a vast area.Inundation canals : long canals taken off from large rivers are called inundation canals. They receive water when the river is high enough and especially when it is in flood
From dams, irrigation channels and canals on the Tigris and Euphrates Rivers. Mesopotamia means between the rivers.
The word canal does not exactly have an antonym, although you may in some cases want to make a distinction between natural waterways such as rivers, and artificial waterways such as canals.
inundated canals are long canals taken off from large rivers and it receive water when the river is high enough and especially when it is in flood .