ENVE-205
Environmental Engineering Hydrology
CHAPTER IV: Evapotranspiration
In this chapter, evaporation from water surfaces and
transpiration from plants will be discussed.
Relationship of Class A pan measurements to surface water evaporation
will be examined.
Study Plan:
·
Learning
the factors affecting evaporation (Section 4.1).
·
Learning
the structure of Class A pans (see figure) for evaporation measurements (Section
4.1.1).
·
Learning
the use of water budget technique for evaporation calculations (Section 4.1.2).
·
Learning
some empirical formulations for evaporation estimation using climatic data and
using the Kohler plots for evaporation determination depending on wind speed,
elevation, temperature difference between air and surface water, and measured
pan evaporation (Section 4.1.3).
·
Discussing
the plant transpiration phenomenon and learning some empirical
evapotranspiration relations such as Thornthwaite equation and Blaney and
Criddle equations (Section 4.2).
·
Example
problems 4.1.
· Homework problems 1, 2, 3, 5, 6, 8.