M ASIF NADEEM BSCT01123192 University of Lahore

2. Engineering Hydrology
Presented By : Asif Nadeem
Reg No : BSCT 01123192
Presented To : Sir Hassan

3. Topic
Measurements of Temperature

4. Measurements of Temperature:
The temperature is measured with the
help of thermometer.

5. Types of Thermometer:
There are two types of thermometer .
1) Maximum Thermometer
( Mercury Type)
2) Minimum Thermometer
( Alcoholic Type)

6. 1)Maximum Thermometer :
(Mercury Type)
Maximum thermometer that record the Highest
temperature to which it has been exposed
( e.g by allowing the arise of mercury passed
a restriction in the tube but preventing the
mercury on contraction ) it is most commonly
used to measure the daily temperature .

7. it work simply and we can easily used it.

10.  Air circulation is relatively Unobstructed
 No Direct Sun Rays
 No precipitation

11.  The thermometer are
placed in white
wooden boxes are
called instrument
shelter.
 4.5 feet Above to the
ground.
 Take readings at 8am
& 5pm.

12. Laps Rate is defined as the change in
temperature per unit distance the vertical
direction from the earth surface.
The average value of laps rate is 3.6
degree foreign height per thousand feet.

13. 1. Dry Adiabatic Laps Rate
2. Saturated Adiabatic Laps Rate
3. Pseudo Adiabatic Laps Rate

14.  Air is not fully Saturated.
Its average value is 17.71 Degree foreign
Height /1000m.

15.  Air is fully saturated .
Average value is 9.84 Degree foreign
Height /1000m.

16.  After Rain fall
 Average value is 9.84 Degree foreign
height / 1000m.

17. M . ASIF