Use of Streeter-Phelps Model to estimate the dissolved oxygen of the Utcubamba River
Abstract
The Utcubamba river is born in the Leymebamba district at 3 100 m.a.s.l., in the province of Chachapoyas of the Amazon-Peru Region, it flows into the Marañón river, province of Bagua and has an approximate length of 253 km of main channel. The populations of Leymebamba, Chachapoyas, Pedro Ruíz Gallo, Bagua Grande, Cajaruro, El Milagro and Bagua, with a total population exceeding 150,000 inhabitants, are the main urban settlements on the banks of the river, or with direct influence on it. The objective of this research work was to use the Streeter-Phelps model to estimate the dissolved oxygen of the Utcubamba River. The methodology used was analytical and consisted in the first instance in selecting the sampling points that were taken on the main channel, from the data reported and documented by the Research Institute for Sustainable Development of Ceja de Selva, INDES-CES; subsequently, according to the hydraulic characteristics, the points where the model was used were determined, from this information the variables were selected, applying the respective equations. The model describes the behavior of the OD for the first 95.2 km, adequately characterizes the processes of self-purification and oxygen balance in river waters. In addition, it is proved that the waste has normal distribution through Shapiro Wilk whose value is 0.9687; This concludes that the model can be used to make inferences.
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