. Physical and commercial geography; a study of certain controlling conditions of commerce. Shang-bai Fig. II. Delta of the Hwang-ho the river has changed its course many times by reason of increasinglyfrequent floods and of the fact that less care has been taken to pre-vent them ; and we find disastrous overflows recorded in 1820, 1858,and 1887. During the last inundation many villages were destroyed,completely or temporarily, and the loss of life through drowning andfamine exceeded 1,200,000 people, considerably more than the entirepopulation of West Virginia, An illustration of the capricio
. Physical and commercial geography; a study of certain controlling conditions of commerce. Shang-bai Fig. II. Delta of the Hwang-ho the river has changed its course many times by reason of increasinglyfrequent floods and of the fact that less care has been taken to pre-vent them ; and we find disastrous overflows recorded in 1820, 1858,and 1887. During the last inundation many villages were destroyed,completely or temporarily, and the loss of life through drowning andfamine exceeded 1,200,000 people, considerably more than the entirepopulation of West Virginia, An illustration of the capriciousness of streams and of the difficultyof adapting deltas to the use of man is furnished by the ColoradoRiver (fig. 12). The lower part of this stream has few branches for TOPOGRAPHY 43 300 miles. The supply of silt from the canyons and mountains ofthe upper basin amounts at times, however, to over a million tons perday; at Yuma, from September, 1903, to August, 1904, 95,000,000tons were carried, and the silt transported annually is sufficient to. t
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