Hetch Hetchy Valley : Report of Advisory Board of Army Engineers to the Secretary of the Interior On Investigations Relative to Sources of Water Supply for San Francisco And Bay Communities
Hetch Hetchy Valley : Report of Advisory Board of Army Engineers to the Secretary of the Interior On Investigations Relative to Sources of Water Supply for San Francisco And Bay Communities
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and the remainder for irrigation. Some years the water supply for irrigation would have been short, as for example in 1898, 40 per cent; m 1908, 14 per cent; and in 1912, 14 Eer cent. With a storage capacity of 900,000 acre-feet there would ave been sufficient water for irrigation except in 1898. For the latter year a storage capacity of 1,400,000 acre-feet would have required and would be practically impossible to obtain economically.
To determine the possibilities of storage an investigation ...has been made of possible reservoir sites in the Tuolumne Basin and the fol- lowing table deduced therefrom. In the columns headed ^' utilizable '' is given the amount which during the dry years mentioned could be counted on from these reservoirs. This table divides the reservoirs as follows: 1. Those which are on drainage areas tributary to Hetch Hetchv and Cherry Valleys and Lake Eleanor, and which might become avail- able for either a city water supply or for irrigation. These make up over 80 per cent of the total capacity.
What to read after Hetch Hetchy Valley : Report of Advisory Board of Army Engineers to the Secretary of the Interior On Investigations Relative to Sources of Water Supply for San Francisco And Bay Communities?
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To quickly assess the difficulty of the text, read a short excerpt:
and the remainder for irrigation. Some years the water supply for irrigation would have been short, as for example in 1898, 40 per cent; m 1908, 14 per cent; and in 1912, 14 Eer cent. With a storage capacity of 900,000 acre-feet there would ave been sufficient water for irrigation except in 1898. For the latter year a storage capacity of 1,400,000 acre-feet would have required and would be practically impossible to obtain economically.
To determine the possibilities of storage an investigation ...has been made of possible reservoir sites in the Tuolumne Basin and the fol- lowing table deduced therefrom. In the columns headed ^' utilizable '' is given the amount which during the dry years mentioned could be counted on from these reservoirs. This table divides the reservoirs as follows: 1. Those which are on drainage areas tributary to Hetch Hetchv and Cherry Valleys and Lake Eleanor, and which might become avail- able for either a city water supply or for irrigation. These make up over 80 per cent of the total capacity.
What to read after Hetch Hetchy Valley : Report of Advisory Board of Army Engineers to the Secretary of the Interior On Investigations Relative to Sources of Water Supply for San Francisco And Bay Communities?
You can find similar books in the "Read Also" column, or choose other free books by United States Dept of the Interior to read onlineMoreLess
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