ENVE-205
Environmental Engineering Hydrology
CHAPTER III: Precipitation
In this chapter, precipitation and the factors
effective on its formation, such as meteorology, weather systems, and
microphysical properties are presented.
Interpretation and quantification of precipitation data are
discussed. Some average watershed
precipitation calculation techniques are presented. Extrapolation of point measurements to
watersheds through rational equation is discussed. The use of intensity-duration-frequency (IDF)
curves is presented.
Study Plan:
·
Learning
the basic definition of meteorology and concepts of atmosphere, water vapor,
solar energy, wind, and temperature (Section 3.1).
·
Learning
the structures of major weather systems such as convective storms, orographic storms, cyclonic storms, and tropical cyclones (Section
3.2).
·
Learning
the precipitation formation mechanism, precipitation classification, water
quality of precipitation, and eutrophication phenomenon (Section 3.3).
·
Learning
some precipitation measurement techniques and missing data treatment methods
such as arithmetic average and normal-ratio methods (Sections 3.4.1, 3.4.4).
·
Learning
the concepts of hyetograph formation, cumulative rainfall diagram, duration
determination of a precipitation event, and dimensionless cumulative rainfall
diagram (Section 3.5).
·
Learning
the isohyetal, Thiessen,
and arithmetic average methods for average watershed
precipitation calculations (Section 3.6).
·
Learning
the use of rational equation for extrapolation of point measurements to areal
watershed calculations (Section 3.7).
·
Learning
the formation and use of intensity-duration-frequency (IDF) curves (Section
3.8).
·
Example
problems 3.1, 3.2, 3.3, 3.4.
·
Homework
problems 1, 2, 3, 4, 5, 6, 8, 9, 11, 12, 14, 15, 16, 18, 22, 25.