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Master Thesis

Méthodologie pour évaluer l’infiltration des eaux pluviales en milieu urbain : test à Argenteuil (95)

Abstract : With the booming of urbanization, rain water has more and more difficulties to infiltrate the ground. Infiltration of rain water is part of the natural water cycle. This research describes the infiltration techniques of rain waters in soil and determines the interactions and limits of these for water management. More precisely, the study will deal about the short cycle of rain water in the subsurface interactions (infiltration/running water).
In front of this, the study is looking for the optimization of rain water management in urban area to integrate this topic in the town planning projects. A better knowledge of retention, transference and infiltration mechanisms in cities will allow to assess the existing constructions effects and to adjust the future design toward a preservation of the anthropoid and natural patrimony. The study tries to describe the water trails in function of intensity and duration of rain: stagnation of water, drainage axis by infiltration of water (vertical or horizontal), surface run off. Infiltration can be summarized as 3 phenomena: evolution of soil humidity, vertical infiltration (in depth) toward ground water and horizontal infiltration (with drainage axis).
In Argenteuil, horizontal infiltration has been identified as predominant. The experimental sites are representative of town ones with altered soils. Every soil is specific and results are only valid for urban aera heterogeneous soils. In fact, the study enlightens the difficulties of assessing the Infiltration of rain water in urban area. This could be explained by the complexity of participating mechanisms. The only observed correlation has been demonstrated between the Seine water level and the ground water levels in a fringe of 200 meters (in this investigation). A first infiltration approximation has allowed us to define the area keen to infiltration (taking care of the presumed favorite paths and soils constraints). This suggestion needs to be verified and linked by further studies. These studies will allow understanding the mechanisms in place to predict and adapt additional constructions if necessary.
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Master Thesis
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Nicolas Neveu. Méthodologie pour évaluer l’infiltration des eaux pluviales en milieu urbain : test à Argenteuil (95). Génie civil. 2013. ⟨dumas-01143073⟩

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