My earlier post was a little in jest since I was on my phone.
Seriously though, knowing you are new to this from your other posts, you need to be very, very cautious in driving through water of unknown depth or bottom conditions.
I know you live in Houston, as do I, and if you pay attention, there are always some morons submarining themselves during our hurricanes or tropical storms.
If you decide to enter a water a crossing, you need to equip yourself with whatever information you can. This can, and often does include getting out, wading in yourself and probing bottom conditions with whatever stick or instrument you can find that is handy. If after gathering information you decide to proceed with a crossing, you need to commit and keep your forward momentum up at virtually all costs. What you are looking for is the nose of your vehicle to create a bow wave that will keep water off the top of the hood and flowing underneath your air intakes located on either fender. Nothing sucks quite as much as having to open a door and watch water flow into the floorpan of your ride.
Take a look at those intakes on either side of your LR4. You must keep the water below that plane of the vehicle at all costs. Failure to do so can easily result in hydrolocking your engine into a $12,000 paperweight.
I have had mine in 38" of water on multiple occasions during Harvey, and other flood events here. I will only do that where I know the street conditions intimately, however. In running trails with water crossings where I do not have a good understanding of what to expect underneath, I would be very hesitant to venture into a depth much over about 3/4 of the wheel height.
If you do find yourself stuck, a buddy with a ****** strap is your best friend, a winch would be your second, and waffle boards would be your third.
I completely agree with what
@jwest posted earlier. I use the same waffle boards he referenced versus the other products out there. They can do everything the other items promise, as well as a host of other things that come in handy. Maxtrax have always struck me as a "one trick pony" in comparison. With four of the waffle boards, you could come damn close to working your Rover up a 90 degree sheer rock face of 5 or 6 feet if it came to that. I actually use my waffle boards as the floor decking on my prospeed rack, as well. Another trick to use with them in deep mud or water is to tie the front of the waffle board to your rear bumper so that if you manage to get out the truck drags them out as well versus having to fish or dig for them.
If you drive through deep water, it is also never a bad idea to refresh the fluids in your differentials and T-case, as well.
Have fun out there.