1 atmosphere for every 10m
Pressure certainly does increase in a water line going down hill. This is because the weight of the water pulls it.
1 atmosphere for every 10m
Evaporation increase with the increase of temperature.
Water pressure increases as the water gets warmer. If water is cold, it doesn't provide much pressure because the molecules move slowly.
Blood pressure would increase
Once a liquid reaches its boiling point (100oC for water), the temperature of the liquid will no longer increase, no matter how much you increase the temperature of the heat source. The only way to increase the temperature of the water is to increase the pressure on it. This is the principle behind a pressure cooker.
The answer depends on the coefficient of thermal expansion of water, and the increase in pressure would be very small. In fact, between 0 and 4 deg C, water contracts and so the pressure will drop!
If it is fresh water, and the surface is at sea level, then the pressure at the surface is 14.69 psi. As you submerge, then the pressure from the weight of the water above you is added to the air pressure above the water. For each foot that you descend, the water pressure will increase by 0.4331 psi, so at 328 feet deep, the water pressure is 142.0568 psi. Add the 14.69 psi air pressure to get 156.7468 psi.
Water at standard atmospheric pressure would be steam (vapor) at 120 degrees C. However, that's not much above the boiling point. If you pressurize the steam, it's easy to keep 120 degree C water liquid. This is how a "pressure cooker" works; it prevents the water vapor from expanding much, which causes the pressure to increase.
There is a much higher volume of water, and increased speed in a river that is in flood. This increase in force will move stones and boulders, scouring the river's bed.
To increase the pressure you would have to reduce the diameter of the pipe. Half the diameter would give you twice as much pressure. Therefore to get 25 percent more pressure you would reduce the diameter by 25 percent giving you 37.5. Be careful though, this only increases the water pressure not the water flow rate.
Pressure cookers work because when you increase pressure, water boils at a higher temperature. Water normally boils at 212 degrees F. Under 15psi of pressure (standard in a pressure cooker), it boils at 257 degrees F. Since your food is cooking at a higher temperature, it will cook faster.