There are flow monitors installed at the outfalls that lead down this side of the mountain. What we are seeing is normal flow rates during storm and peak events. Even large events are not currently hitting the levels of a couple of precedent storms in the past few years.
That said, what we are getting is continuous storms of moderate magnitude which is giving the ground no time to recharge so we are dealing with absolutely saturated ground conditions even in the forested environment. Further to this, we've had two of these nearly 3-day events almost back-to-back (within a couple of weeks of each other). So even as the top layers dry, there is still considerable ground water flows (meaning the water table is likely running high).
While this can be good for our reservoirs and the little fishies at the bottom of the hill, it does mean that when water is flowing on or near the surface continuously, we then notice the path of least resistance - the trails. So while there is a lot of water flowing down the trails at this time (certainly not just GJ and Uppercut - but those are the most popular wet season trails - Nicole's was a veritable creek in places), it's a good time to assess where trail repairs can be done to help mitigate this. I'm afraid this is likely a new rainfall pattern that we will see more of as temperatures rise and climate shifts.
One "watershed" is Upper GJ, middle GJ to the right of way. More work will be done on that through Monday. This should resolve as much as can be resolved before nature just will do what nature does. Meaning, maintenance, but not massive blow-outs. Past the ROW to Upper Cut and Lower GJ, is a bit of a different catchment and I think less of an issue; it's just suffered from peaking events of late. The creek down under the ROW is a regular performer in consecutive wet events, but I think a drainage solution will be undertaken on Monday.
And Eco - believe me, the City is out there these days, but there isn't a fix for everything ma nature throws at you and people seem to forget that reality.
Water - she's a tough nut to crack.