Flow conditions
In hydrogeology, flow conditions refer to the ratio of water withdrawal from a well and the inflow of groundwater into the well. The type of flow conditions is central to planning and evaluating pumping tests .
From stationary flow conditions is when the groundwater inflow into the well corresponds exactly to the water intake. Both the water level in the well and the groundwater level around the well are then invariable over time, the withdrawal and inflow are in dynamic equilibrium. One then speaks of a steady state of the well water level. Strictly speaking, steady flow conditions cannot be achieved due to the temporal fluctuations of the groundwater level, which is why one speaks of quasi- steady flow conditions .
Of unsteady flow conditions is when there is no balance between abstraction and groundwater inflow has stopped. The groundwater level around the well then changes over time.
Individual evidence
- ^ A b Bernward Hölting, Wilhelm Georg Coldewey: Hydrogeology . Introduction to General and Applied Hydrogeology. 8th edition. Springer-Verlag, Berlin / Heidelberg 2013, ISBN 978-3-8274-2353-5 , pp. 273 , doi : 10.1007 / 978-3-8274-2354-2 .