Homework Sourse2 Using the degreeday or temperature index method estimate t
2. Using the degree-day or temperature index method, estimate the total amount of snowmelt in mm in a Boreal forest area of Canada, during a period of major melt if the daily temperature are as follows: Day Temperature °C 2 2.5 4 8.5 4 6 Note that the climate station is located at the sea level while the Boreal forest\'s mean elevation is 500m, and the lapse rate is -7 C/1000m. Refer to the degree-day equation in the class handout.
Solution
Acc to temp index method,
M =Cm(Ta-Tb)
where:
M = snowmelt in in/d
Cm = the degree-day coefficient in in/degree-day F
Ta = mean daily air temperature °F
Tb = base temperature °F
As Cm value id not given Assume, Cm=0.06inches/degree-day F
using Tb=30.2oF
Hence total amount of snpw melt=1.674 inches =42.5196 mm Answer
| Day | Temprature(oC) (of forest using lapse rate) | Temprature(oF) | Degree Day(Ta-Tb) | Estimated melt (in inch/d) |
| 1 | 0.5 | 32.9 | 2.7 | 0.162 |
| 2 | -1 | 30.2 | 0 | 0 |
| 3 | 3.5 | 38.3 | 8.1 | 0.486 |
| 4 | 5 | 41 | 10.8 | 0.648 |
| 5 | 2.5 | 36.5 | 6.3 | 0.378 |
| Total | 1.674 |
