. Bulletin. Forests and forestry -- United States. 72 A PRIMER OF FORESTRY. the bottom, the heavier pieces first. Where it falls the beds of rivers are filled up and fertile lands are covered with pebbles and sand. For a time after such a flood the streams are usually low, because the water which should have fed them for weeks or months has run otf in a few days. This may be quite as serious a matter for the farmers as. Fig. 47.—Plantation of European alder in the bed of a torrent controlled by- dams. This torrent is now extinct. Alps of southern France. the destruction of their fields, as for
. Bulletin. Forests and forestry -- United States. 72 A PRIMER OF FORESTRY. the bottom, the heavier pieces first. Where it falls the beds of rivers are filled up and fertile lands are covered with pebbles and sand. For a time after such a flood the streams are usually low, because the water which should have fed them for weeks or months has run otf in a few days. This may be quite as serious a matter for the farmers as. Fig. 47.—Plantation of European alder in the bed of a torrent controlled by- dams. This torrent is now extinct. Alps of southern France. the destruction of their fields, as for example in places like southern California, where the crops depend on irrio-ation with the water of streams which rise in the mountains. Torrents have begun to form there in the San Bernardino Mountains, and have alread}^ car- ried stones and sand into the orange groves and even into the towns of the San Gabriel Vallev. Before the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Division of Forestry. Washington : G. P. O.
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