How fast does lake water evaporate?

How fast does lake water evaporate?

If all three ingredients are present, as often occurs in the fall and winter, evaporation rates from the Great Lakes can get as high as 0.4-‐0.6 inches per day.

How do you calculate evaporation of a lake?

The Penman formula for the evaporation rate from a lake is simplified to the following: E 0 = 700 T m / ( 100 − A ) + 15 ( T − T d ) ( 80 − T ) ( mm day − 1 ) where Tm = T + 0.006h, h is the elevation (metres), T is the mean temperature, A is the latitude (degrees) and Td is the mean dew-point.

How much water evaporates from a lake on a hot day?

Waurika Lake can lose an average of 100 mgd to 120 mgd in the hot summer months, while Lugert-Altus’ potential loss is 49.2 mgd to 98.4 mgd. Calculating or even explaining evaporation rates is complicated, because of the variety of factors that influence it.

What is the rate of evaporation for water?

Evaporation rates are usually expressed as the water depth lost in millimetres over a period of time, e.g., 2 mm/day, 14 mm/week or 60 mm/month.

Why is my lake losing water?

Some do lose water due to seepage. They lose more or less depending on what kind of rock and sediment lies beneath the lake. A rocky bottom holds water better than a sandy bottom. Lakes are also subject to evaporation from their surfaces – especially in a dry places – for example, the American West.

How long does water stay in a lake?

List of residence times of lake water

Lake Location Residence time
Khanka Lake Heilongjiang Province, China and Primorsky Krai, Russia 1 year
Lake Monona Dane County, Wisconsin 1.1 years
Long Lake Maine 1.1 years
Mooselookmeguntic Lake Franklin County, Maine 1.1 years

What is the evaporation rate on a 1 acre pond?

A seepage rate of 0.2 inch per day from a 1-acre pond does not seem significant but this rate will result in a water loss of 6 inches per month or 6 acre-feet in a year.

How much water evaporates in a day?

Depending on various environmental factors—including your location, average daily temperature, and the amount of sun your pool gets every day—your pool may lose more than half a centimeter of water every day. This translates to just under five centimeters a week, on average.

How much evaporation from pond is normal?

It is normal to lose 2-3″ of water in a week from evaporation. Garden ponds from 500 to 2500 gallons and larger usually only require small weekly watering.

What lakes are drying up?

7 Lakes That Are Drying Up

  • Lake Poopó Lake Poopó
  • Lake Eyre. Also called Kati Thanda–Lake Eyre, this great salt lake in central South Australia has a total area of 4,281 square miles (11,088 square km).
  • Aral Sea. Aral Sea.
  • Lake Mead. Lake Mead.
  • Lake Chad.
  • Lake Urmia.
  • Dead Sea.

Do lakes evaporate?

Lakes are also subject to evaporation from their surfaces – especially in a dry places – for example, the American West. So why don’t lakes just dry up? Some do. For a lake to keep its water over time, it has to be replenished.

Do lakes dry up?

Many of the lakes on this list will dry up within years (a few already have, more or less), but some may take decades to disappear entirely. The reasons vary, but most will expire because of drought, deforestation, overgrazing, pollution, climate change or water diversions—or all of the aforementioned.

What is normal evaporation for a pond?

How much water should a pond lose per day?

On average a water feature will lose ½% to 1% of the gallons pumped per hour in a day.

How much water evaporates from a pool in Texas?

During the summer in Texas, pools can lose several inches of water due to evaporation every couple of days (about 120 gallons of water).

How do you determine if a pond is leaking?


  1. Fill the pond water up to the appropriate level.
  2. Unplug the pump.
  3. Let the pond sit for 24 hours.
  4. After 24 hours, check the water level.
  5. Check all fittings, plumbing, and pump connections for leaks.
  6. If the water has dropped, you do in fact have a leak in your pond.

What lakes are losing water?

What lake out West is drying up?

Lake Badwater (California) Whereas human demand is often to blame for the shrinking of lakes, the seasonal evaporation of Lake Badwater is totally natural. It, like the Aral Sea, is an endorheic basin, appearing only after rare rain storms in California’s Death Valley.

How long does it take for a pond to evaporate?

Causing water levels to drop roughly 1 inch per week, evaporation is the most common cause of pond water loss. But don’t panic, this is normal. Factors such as location, time of year, pond size and especially weather, can affect the rate at which evaporation occurs.