William, I think we're talking two different things, I'm talking about getting rid of water after rains, etc. Whereas I think you're addressing how to get more water out there (which is totally needed sometimes).
I meant both. In the past we tried ways to save some water vs call the water truck.
There's a french drain on north side path now that's mostly covered. Getting water out the N.E. side of pump track or west side is what's worked best and stopping too much water toward the jump line.
To measure, there were some quality equal length stakes with tape top and bottom that we used with levels and climometers to measure. Now there are theodolite apps (I have one), and they will make it easier than what Walter and I did with tape measure and levels.
It's probably easier to show you the fix spots there than type it here.
Thanks.