Does someone have a reference regarding the hydration requirements of a person hiking, hunting, nordic skiing?

How much water do you need per day.

In what enviroment/temerature?

Let's use 3000 feet, dry conditions at 68 degrees F.

A solid reference would be appreciated.

the united states army field manual, known for dealing with the needs of large groups of people:
here.

You are asking for three very different types of activity. Nordic skiing is a very aerobic activity. Hiking can be considered aerobic but it is mostly a low impact activity that affects the muscular/skeletal systems before the heart/lungs. (This does not consider the individual fitness, amount of weight being carried, temperature, altitude and elevation.) Hunting also has a wide variance of aerobic potential but is is mostly a walking, stalking, sitting environment. Depending on the animal, birds would add very little to effort but hauling a deer would be quite taxing physically.

All this activity also does not include how each individuals body processes exertion, heat and sweat rates.

Still with me? So all this being said as a general rule of thumb I recommend drinking between 4-6oz of water every hour awake. This is not guzzling a liter every 4 hours, this is consistent imbibing every hour. This is also in line with most philosophy of drinking 12 oz of water 6x per day or 8oz of water 8x per day. With increases in consistent activity, nordic skiing by example, a person could/probably should be looking at closer to 1 liter per hour.

It is not advisable to 'pound' water or guzzle a liter at a time, regardless of activity. Consistent sipping will allow the kidneys to flush toxins out of the blood and keep your core temperature lower.

There is no one answer.

Things that factor in:
-physical condition
-activity type and duration
-temperature
-humidity
-general health
-what you eat
-medication
-injury

You should be peeing clear and colorless. You should do so several times a day. That is the closest there is to "one answer".

@IronRaven

Well put. I suppose I will also through out the cliche, "if your thirsty its too late."

Back in the 80s a few military organizations went to a [censored]/drink on demand standard in the field during hot weather. August in Camp Blanding, pushing 100F, no wind, 100% humidity can eat your lunch.

At the first sign of dragging, other times entirely randomly, someone would tell you to take a leak. If you couldn't produce a good stream you were told to drink a canteen full of water. Other times they would just tell you to drink, just making sure.

Mostly it was the macho guys who were too tough to drink, and a few country boys who think 'you sweat less if you don't drink', as if that was a good thing, that had issues. They were usually the ones who got 'bear caught' and fell out. It can come up fast. One minute I was talking to a guy who looked a bit winded and the next he was on the ground having convulsions. Serious enough a situation that we flew him out by helicopter packed in ice.

We had had problems but after that it was [censored]/drink on demand.

Cold weather doesn't drop the bodies from dehydration as quickly. It kind of sneaks up on people. Cold seems to suppress the feelings of thirst. Under such conditions dehydration can make you feel colder, make you more prone to frostbite and generally decrease physical and mental performance. Having a few people who had to be surgically 'opened up' with a glorified apple corer due to 'fecal impaction' caused by dehydration, described as the worse case of constipation imaginable, caused a greater emphasis to be placed on proper hydration.

Good times.

I would peacefully disagree with your comment on Cold weather not causing dehydration as quickly. I may be parsing your words or thoughts, but coldness is a false sense of hydration security.

Perhaps because people don't stay out in the elements as long in cold or the activities are not as vigorous but people get dehydrated at alarming rates because of this false sense. A cold wind will absolutely dehydrate a person.

As to to the drink on demand in the military. i remember those times very well. A deep booming voice saying loudly, "HYDRATE".

I use that with my son to this day.

Dehydration can also contribute to hypothermia. If it hadn't happened to me, it wouldn't have occurred to me. Then I looked it up, and guess what?!

"Cold weather dehydration can lead to total body core cooling."
http://www.thefarm.org/charities/i4at/surv/cold.htm

Sue