Modelo hidrogeol?gico para simular la interacci?n entre el Dren Las Vegas y el R?o Aconcagua

Seventy five percent of the potable water of the city of Valpara?so, Chile, is obtained from the exploitation of aquifer of the Aconcagua River aquifer at the Las Vegas system. The Las Vegas system is located at approximately 70 km from the city and it is comprised by several civil works for collect...

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Detalles Bibliográficos
Autor Principal: Ter?n Parra, Edwin Iv?n
Otros Autores: Mu?oz, Jos? Francisco
Formato: Tesis de Maestría
Lenguaje:spa
Publicado: Santiago / Universidad Cat?ligca de Chile / 2015 2015
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Acceso en línea:http://repositorio.educacionsuperior.gob.ec/handle/28000/1716
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Sumario:Seventy five percent of the potable water of the city of Valpara?so, Chile, is obtained from the exploitation of aquifer of the Aconcagua River aquifer at the Las Vegas system. The Las Vegas system is located at approximately 70 km from the city and it is comprised by several civil works for collection, transport and treatment, being that of major importance the Las Vegas drain. The Las Vegas drain is approximately 2000 m lengths and it is buried at a depth of 40 m in a zone that has a strong interaction between surface waters and groundwater. Since its construction in 1960, the hydraulic characteristics of the drain have changed; forcing the water utility company to include additional potable water, complicating the managing of the drain in operational aspects because don?t have a clear idea of the contribution of the aquifer to the Las Vegas drain. Modflow 2000 numerical model was constructed to analyze the functioning of the Las Vegas drain in the time. The numerical model has three layers with 356400 cells of 50 x 50 m2. The analysis per?od is 32 years and takes into account the precipitation, irrigation, and infiltration from the Aconcagua River and the infiltration ponds like inflow water; while the discharges of the model are outcrops in natural riverbeds and pumping from wells. The model establish a direct relationship between the water flow at the exit of the drain and the streamflow of the Aconcagua River, and to define the conductance of the river as a function of the streamflow. The initial conductance of the drain was modified to reflect its change in time. This model is an excellent tool that supports decisions to optimize water management in per?ods of drought and flood.