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--- start:hype_model_description:aquifier [2018/09/10 10:09]
cpers [Links to file reference]
+++ start:hype_model_description:aquifier [2020/12/02 09:43]
cpers [Aquifers]
@@ Line 39: / Line 39: @@
 ===== Aquifers =====
+Aquifers are large water bodies covering several subbasins and located below the soillayers simulated by HYPE. They recieve water by percolation from land and river classes, and they return flow to a river. The aquifer is a large water body that can have a passive volume partaking in mixing but not return flow.
 ==== Deep percolation ====
@@ Line 61: / Line 65: @@
 ==== Deep percolation delay and aquifer recharge ====
-Deep percolation from soil and rivers in all recharge subbasins of an aquifer is added together. This total deep percolation (//qperc//) is delayed before it recharges the aquifer (//qrech//).
+Deep percolation from soil and rivers in all recharge subbasins of an aquifer is added together. This total deep percolation (<m>q_{perc}</m>) is delayed before it recharges the aquifer (<m>q_{rech}</m>).
+<m> q_{rech}(t) = (1-coeff) * q_{perc}(t) + coeff * q_{rech}(t-1) </m>
+<m> coeff = e ^ {-1/delayts} </m>
-The delay property (//delay//, in days) is specific for each aquifer. It can be adjusted by the parameter region dependent model parameter //aqdelcor//.
+The delay property (//delayts//, in timesteps per day) is specified for each aquifer (//delay// in days). It can be adjusted by the parameter region dependent model parameter //aqdelcor//.
 ==== Return flow from aquifer ====

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