Download PDF by Gould R.F. (ed.): Anaerobic Biological Treatment Processes

By Gould R.F. (ed.)

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Sample text

19 It was not until the early eighteenth century that irrigation began in this area, haltingly as it had in the north. The delay allowed techniques to be developed to divert the main river. This was rewarding, since here the irrigable flood plain was wider and the main stem volume much greater. There were also negatives: maintaining primitive brush-and-rock diversion dams against the force of the Rio Grande spring flood was challenging, while in late summer the river flows sometimes dropped so low that diversion was no longer possible.

28 Despite the similarities, however, essential differences remained. Those differences showed primarily in how the ditches were internally operated and in the amount of control an individual had over his farmland. Public and private interests were never as evenly balanced in the Puebloan irrigation institutions as they were in Hispanic ones. Puebloan irrigation institutions were more infused with communal values. Despite some chafing, most pueblos recognized individually irrigated tracts as the property of the pueblo as a whole.

The boulder, the ditch, and the fruit tree are all still there, testament to both the permanence and precariousness of the ditch. Finally, the Acequia del Molino and the Rio Frijoles emerge together into the small, open valley that was always the target of both. The length of the ditch that conveys water to the valley is almost as long as the length of the ditch running on the east side of the irrigated fields. There, Rio Frijoles courses north over a rock-and-pebble streambed as it runs through the center of the valley.

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Anaerobic Biological Treatment Processes by Gould R.F. (ed.)

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