3. Where are lakes around
Lakes are not evenly distributed on the
earth surface but also found on the
Mountaineous region.
4. How lakes are formed:
Lakes are formed by glacial erosion .
GLACIAL EROSION:
Glacial formed basin lake by gouging the hole in soil in
which The chunks of ice later melted to leave the lake
basin .the natural depression then filled with water
formed lake.
6. Epilimnion:
This is the upper layer of lake containing circulating cold water
and six meter in depth in which the concentration of oxygen is
very high .
METALIMNION:
This is the middle layer separating both the Epilimnion
And hypolimnion.
hypolimnion:
This is the lower layer with non circulating cold water in which the
concentration of oxygen is very low or some time become absent.
7. Physical characteristic of lakes:
LIGHT:
Light is influenced by silt and other material carried into lakes.
temperature:
Temperature varies seasonally with depth
DENSITY:
Water is most dense at 4c and become less dense at both
higher and lower temperature.
8. HOW MANY LAKES OF PAKISTAN:
There are around sixty lakes in Pakistan all
known for their distinctive location and
natural beauty.
10. Attabad Lake:
The first lake of Pakistan is 'Attabad Lake' located in Gojal Hunza
Valley, Gilgit Baltistan, Pakistan. The lake came into existence in
2010 as a result of the Attabad disaster.
12. Manchar Lake:
The largest lake in Pakistan is the Manchar Lake, which is
also the largest lake in South Asia.
The lake is spread over an area of over 260 square kilometres
(100 square miles).
16. Keenjhar Lake:
Keenjhar lake located away from thatta 112 kilometer from
karachi and 80 kilometer from Hyderabad.
17. Advantages:
Advantages of Lakes:
Develop hydroelectric power.
They provide water supply for the purpose of irrigation.
Provide fresh water for drinking.
Industries and factories use river and lake water for their functioning.
Supply water for irrigation in agricultural fields.
Help to develop the fisheries.