Problems of the Panama Canal: Including Climatology of the Isthmus, Physics and Hydraulics of the River Chagres, Cut at the Continental Divide and Discussion of Plans for the Water-Way
Problems of the Panama Canal: Including Climatology of the Isthmus, Physics and Hydraulics of the River Chagres, Cut at the Continental Divide and Discussion of Plans for the Water-Way
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ...level their effect should have been much more apparent at Bohio, below the gorge, than at Buena Vista, a mile and a half above. But the records just quoted indicate that the fall in water surface between Buena Vista and Bohio in the two floods was so nearly identical as to render the large difference in ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ...level their effect should have been much more apparent at Bohio, below the gorge, than at Buena Vista, a mile and a half above. But the records just quoted indicate that the fall in water surface between Buena Vista and Bohio in the two floods was so nearly identical as to render the large difference in absolute level between them inexplicable upon any other supposition than that of a much larger volume passing in 1879 than in 1888. Moreover, as a matter of fact, in both floods the whole region below Bohio was deeply inundated, and in so enormous a waterway an increase of 2,500 square feet, largely estimated, could not have materially lowered the general level. On the contrary, the cuttings across the natural bends in the lower river may have caused in 1888 whirls and cross currents tending even to raise it. It is clear that the only conservative estimate to be formed of the maximum momentary discharge at Bohio in the flood of 1879, is that to be derived from the recorded water level 39.37 feet above zero; and this by the rating table is shown to be 112,730 cubic feet per second. Unfortunately no water levels in this flood were secured at Gamboa, but the fact that the oscillations in this lower part of the basin are quite similar justifies the following computation, based on the comparative levels attained in the other four floods. The table gives the extreme heights above mean sea level in metres, and the figures below indicate the calculations to deduce the probable height at Gamboa. The probable levels at Bohio in the flood of 1885 are deduced in a similar manner. Locality 1879 Nov., 1885 Dec, 1885 1888 1890 1893 Gamboa 25.17? 23.60 21.35 23.56 23.70 21.72 Buena Vista 1340 12.18 Bohio 12.00 10.30? 8.05? 10.57 9-8o 8.70 2356 + (1200--10.57) =...
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