I use a pair of rolled socks. Maybe in a big stuff sack (like a big duffel?) and shake it around a bunch?

Key point beyond the numbers: It's possible to gain insights about surface water–GW interactions of a mountain glacierized basin without a full 3D numerical GW representation by using a process-based hydrological model + a well-developed, robust conceptual understanding + data!

We looked at climate change scenarios by varying T/P for different glacier covers. Most interestingly, we see limited changes in streamflow (especially GW!) because of the balance between glacier retreat and the increase in precip and ET. It's a fine balance!