what causes lakes and ponds to turn over?

Answer 1

The turn over is very different in the type and climate of a lake or body of water and is caused by water density with season changes.This with the thermocline ,weeds,run off...... will effect the natural turn over effect of the water body.
Poster #1 looked up some good info for you!

Answer 2

I found this in my search on the web:
Lake Cycles
There are eight general changes throughout the year which affect Sierran Lakes and how they are fished. Together, these changes represent a cycle. Not all of these changes occur to every lake. For instance, low elevation reservoirs will not freeze-up nor have a corresponding ice-out. These reservoirs may not even have a Fall Turnover despite having similar temperatures throughout the depths.

Ice-out
Spring Turnover
Second Warming
Stratification
Descending Thermocline
Fall Cooling
Fall Turnover
Freeze-up

Spring Turnover
When the surface temperature of the water reaches 39 degrees Farenheit, the lake will turnover. This creates a turbid condition with sediment from the bottom clouding the entire water column. Fishing is usually poor during this period. The period usually lasts for only 1-2 weeks when sediment settles again and the water column has the same temperature and dissolved oxygen content.

Fall Turnover
When the water at the surface cools , it increases in density. At some point when the density of the surface water equals the density of deeper waters, it will turnover with the warmer waters below and achieve an iso-thermal condition in which all the water column are of equal temperature. The fish will often feed exclusively within the shallow, shoreline areas during this time until freeze-up.

Answer 3

I don't know if all these answers are what your looking for or a simple answer, coming from a lake community, living there all my life. The lake heats up with all this dry hot weather and algae builds up, the lake starts getting green and thick with algae, which certain fish eat on.
Anyway, this in turn starts a cycle and within a few days the lake is green and you can't swim in it.
Small water borne fleas also generate in this water that bite called "Duck itch" you have to take a good shower after a swim or get a rash.

Answer 4

well the surface water cools and gets heavier it will sink and the being cooler than the bottom water the bottom water, being warmer, will raise to the surface. after turning and turning the water from the surface to the bottom will be the same temp. this will also cause the fish to scatter and will feel comfy any place. this is why people think it turns the fish off. but in reality they are just spread out and harder to find. they will still bite. hope this helps.

Answer 5

Several Grass carp, large catfish and crappie, a few Bass all floating. Did a turn over do that?

Answer 6

Surface temp 39.2 Degrees

Answer 7

Torque

Answer 8

Water temperature, basically changing of the seasons.

Answer 9

when it looses the oxygen,that's what kills all the fish.if you catch it before it turn completely you can save it by aerating it.

Answer 10

i think its got to do with more/less density. like the way ice floats.