Solutions analytiques pour la zone d’appel d’un puits de pompage situé à proximité d’un cours d’eau Soluciones analíticas para la zona de captura de un pozo de bombeo cercano a una corriente Soluções analíticas para a zona da captura de um furo de captação próximo de um curso de água | Analytical solutions for the capture zone of a pumping well near a stream
2011
Asadi-Aghbolaghi, Mahdi | Rakhshandehroo, Gholam Reza | Kompani-Zare, Mazda
The capture zone for a fully penetrating well in an aquifer with regional flow to a stream boundary under steady-state conditions was delineated using complex algebra and image well theory. Regional flow in the aquifer was allowed to take different directions relative to the stream axis. Two critical pumping rates, Q C1 and Q C2, produce three capture-zone pattern scenarios: (1) at low pumping rates (Q < Q C1) water is solely withdrawn from the aquifer and no water from the stream enters the aquifer, (2) at medium pumping rates (Q C1 < Q < Q C2) a portion of stream water enters the aquifer but it is not captured by the well, and (3) at high pumping rates (Q > Q C2) pumped water is supplied from both the aquifer and the stream with different proportions. For the second and third scenarios, the stream length interval through which stream water enters the aquifer was determined and found to be more sensitive to pumping rate as the regional flow direction approaches the stream axis. The portion of pumped water supplied by the stream was determined in the third scenario. Finally, the capture-zone asymmetry with respect to its axial line was delineated.
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