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A one-year reconnaissance study was made of a large braided glacial river and its drainage basin for which a minimum of hydrometric and meteorologic data existed. The report includes estimates of the water balance, flow-duration curves, and sediment characteristics, and descriptions of stream response to glacial melt and rain, channel geometry and channel processes. Mean annual basin precipitation is estimated at 40.4 in. and mean annual loss of permanent glacial storage is about 1 in. About 30% of this leaves the basin as evapotranspiration, 50% as stream flow, and 20% as groundwater flow. Characteristics of response to glacial melt are outlined. Flow peaks near the mouth occur within 24 hours of rainfall greater than 0.5 in./day at foothills meteorological stations; rains of less than that amount do not generally produce discernible stream response. Stream channel geometry is described in detail. Most channels on the lower floodplain are asymmetrical and are roughly triangular or parabolic, and have high width/depth ratios. At-a-station hydraulic geometry is described. Surveys and ground and aerial photography are used to describe channel changes. (Author).
These pages narrate the travels, in a popular sense, of an Alaskan exploring expedition. The expedition was organized with seven members at Vancouver Barracks, Washington, and left Portland, Oregon, ascending through the inland passage to Alaska, as far as the Chilkat country. At that point the party employed over three score of the Chilkat Indians, the hardy inhabitants of that ice-bound country, to pack its effects across the glacier-clad pass of the Alaskan coast range of mountains to the headwaters of the Yukon. Here a large raft was constructed, and on this primitive craft, sailing through nearly a hundred and fifty miles of lakes, and shooting a number of rapids, the party floated along the great stream for over thirteen hundred miles; the longest raft journey ever made on behalf of geographical science. The entire river, over two thousand miles, was traversed, the party returning home by Bering Sea, and touching the Aleutian Islands. The opening up of the great gold fields in the region of the upper Yukon, has added especial interest to everything pertaining to the great North-west. The Klondike region is the cynosure of the eyes of all, whether they be in the clutches of the gold fever or not. The geography, the climate, the scenery, the birds, beasts, and even flowers of the country make fascinating subjects. In view of the new discoveries in that part of the world, a new chapter, Chapter XIII, is given up to a detailed description of the Klondike region. The numerous routes by which it may be reached are described, and all the details as to the possibilities and resources of the country are authoritatively stated.
Indexes kept up to date with supplements.