Sorry to bring back an old thread - but if people are capturing water, it's also good to remember there is a lot of water under the ground.
I've had a water problem in my basement since I moved into the house 17 years ago. The lot is sloped - so I figured if I could drain it away somehow I would solve the problem. I've worked on running drain pipes along the footer of my foundation , and I also put in drain pipes along the footer of my barn after the foundation was poured. The plan was to have them all run to the lowest part of the lot (one back corner) and drain to grade. Well somewhere along the line I screwed up - and the end of the pipe ended up being about 4 inches below grade.
The soil is very moist and almost has standing water there in the spring time - so I figured that was no good. The solution I decided on was to build a drywell/cistern to drain the water into - and from there I figured I could pump if needed. I looked around at different methods of building a "tank" - and the cheapest method I came up with was to build a square "tank" using cement blocks - fill in the voids with concrete and reinforce the whole thing with rebar - and then coat it with this stuff from Quikrete called Quick Wall
https://www.quikrete.com/productlines/quikwallsurfacebondingcement.asp
The sides of the bag actually say it can be used for building water tanks.
I ended up with a "tank" that will hold about 750 gallons - and is buried underground. It goes down about 10 feet once I was done (the grade was actually brought up as well as the tank being buried).
When we had the massive snows 2 winters ago - I dropped a pump down into the tank once the snow started melting. I lost count but I must have pumped that thing out at least 12 times - from completely full to only 6 inches or so left in the bottom. And as I was pumping it would be filling right back up again.
Point is - literally thousands of gallons of water passed thru that thing.
If you had a way of storing it - I bet there are a lot of places in New England where literally thousands of gallons of water could be captured underground with strategically placed drain piping.