CIVL3510
HYDROSYSTEMS ENGINEERING
Introduction
(1. Scope of Hydrosystems Engineering)
1
Hydrosystems
Hydrosystems Engineering is a term originally
coined by Prof. Ven-Te Chow to describe
collectively the technical areas of hydrology,
hydraulics, and water

CIVL3510
HYDROSYSTEMS ENGINEERING
Introduction
(3. Hydrosystems & Modeling)
Hydrosystems
System (Definition)
A system is a set of connected parts that form a
whole.
A system consists of a set of interactive elements that
perform
independently of each oth

CIVL3510
Hydrosystems Engineering
8. Hydrological Routings
(a) Reservoir Routing
1
Flow Routing
A technique to compute the effect of system storage
and system dynamics on the shape and movement of
flow hydrographs along a watercourse.
When the flow is a f

CIVL3510
Hydrosystems Engineering
7. Rainfall-Runoff Modeling
Introduction
1
Rainfall-Runoff Modeling
Rainfall
Rainfall
Watershed
Rainfall-Runoff
Model
Runoff
Runoff
2
Modeling Considerations
Development of a rainfall-runoff model depends on
(1) Time scal

CIVL3510
Hydrosystems Engineering
8. Hydrological Routings
(b) River Routing
1
Hydrologic River Flood Routing
Basic Equation
dS
t I O
t
t
dt
S
S
I
I
O
O
t 1
t t 1 t t 1
t
t
2
2
2
Muskingum Method
For a non-uniform flow, Stf(Ot)
Because It=f(y1,t) and Ot=

CIVL3510
HYDROSYSTEMS ENGINEERING
Open Channel Flows
1
Pictures of Open Channel Flows
Features of Open Channel Flows
Flow in a channel open to the
atmosphere
Behavior of flow in channel is then
determined by the dynamic balance
between gravity force and t

CIVL3510
HYDROSYSTEMS ENGINEERING
Introduction to Hydraulics
1
Classification of Flow
Open Channel Flows
With free surface (subject to atmospheric pressure)
Governed by gravity
Pressurized Flows
No free surface
Governed by pressure difference
V2/2g
EGL
HG

CIVL3510
HYDROSYSTEMS ENGINEERING
Hydraulics of Pressurized Pipe Flows
1
Layout of Water Supply Systems
Introduction
Pipe flow
-Flow
that is contained within a closed conduit and therefore
does not have a free surface
-If flow in pipe does have a free sur

CIVL3510
Hydrosystems Engineering
2b. Hydrologic Frequency Analysis
Estimating Parameters in a Distn Model
Population:
X ~ f (x| 1, 2, , m)
Samples:
(x1, x2, x3, , xn)
X
n
MLE: Max L x | f X xi |
, ,.,
i 1
1
2
m
f X x1 | f X x2 | f X xn |
MoM:E X k k' x

CIVL3510
Hydrosystems Engineering
4c. Precipitation Analysis
1
Precipitation Gauge Network
Precipitation varies both in time and space
Sound hydrologic/hydraulic designs require adequate
estimation of temporal/ spatial precipitation patterns.
The density

CIVL3510
Hydrosystems Engineering
6b. Streamflow &
Hydrograph Analysis
1
Runof
Runoff is that part of the precipitation, as well as any other flow contributions,
which appears in surface stream of either perennial or intermittent form
T
o
to
a
ln
P
r
e
c

CIVL 3510
Hydrosystems Engineering
3. Hydro-economics
1
Why Engineering Economic Analysis?
The basis of many engineering decisions is an
economic one.
Any proposed engineering & management scheme
must not only be safe and technically feasible, but it
must

CIVL3510
Hydrosystems Engineering
6a. Streamflow & Hydrograph
Analysis
1
STREAMFLOW
and
HYDROGRAPH ANALYSIS
Streamflow is one of the most important topics in
engineering hydrology because it directly relate to
water supply, flood control, reservoir design

CIVL3510
Hydrosystems Engineering
5b. Hydrologic
Abstractions
Horton Infiltration Model
Hortons Equation
One of the popular infiltration model.
Observation: infiltration rate decrease with time until it reaches a more-or- less
constant value, fc.
Hypothes

CIVL3510
Hydrosystems
Engineering
5a. Hydrologic
Abstractions
Schematic Diagram of Hydrologic Cycle
Hydrologic Abstractions
Problems in hydrologic design and analysis requires
modeling of precipitation-runoff relationship.
- Runoff = Total Precipitation L

CIVL3510 — HYDROSYSTEMS ENGINEERING
Suggested Exercises #01 (Water Balance — Solution)
Problem — 1
The world population in 2012 has reached at about 7.1 billion. The annual population
increase during the preceding decade was about 2 percent. At this rate

CIVL3510 HYDROSYSTEMS ENGINEERING
Suggested Exercises #04 (Precipitation Analysis)
1. The following incremental rainfall data were recorded at gage 1-WLN in Austin,
Texas, on May 24, 1981. Plot the rainfall hyetograph. Compute and plot the
cumulative rain

CIVL3510 HYDROSYSTEMS ENGINEERING
Suggested Exercises #03 (Hydro-economics)
1. A private investment syndicate in Italy considered financing two water power
developments in the foothills of the Alps. The pertinent conditions were as follows.
Plant no. 1 co

CIVL3510 HYDROSYSTEMS ENGINEERING
Suggested Exercises #01
1. The world population in 2012 has reached at about 7.1 billion. The annual population
increase during the preceding decade was about 2 percent. At this rate of population
growth, predict the year

CIVL3510 HYDROSYSTEMS ENGINEERING
Suggested Exercises #02 (Hydro-statistics)
1. A company plans to build a production factory by a river. You are hired by the company
as a consultant to analyze the flood risk of the factory site. It is known that the magn

CIVL3510 HYDROSYSTEMS ENGINEERING
Suggested Exercises #04 (Precipitation Analysis)
1. The following incremental rainfall data were recorded at gage 1-WLN in Austin,
Texas, on May 24, 1981. Plot the rainfall hyetograph. Compute and plot the
cumulative rain

(civl253)[2010](f)midterm~wmma^_10066.pdf downloaded by mkkwai from http:/petergao.net/ustpastpaper/down.php?course=CIVL253&id=1 at 2014-10-26 03:46:53. Academic use within HKUST only.
CIVL253 HYDROLOGY
Mid-term Examination (21 October 2010)
(Solutions)
P

(civl253)[2009](f)midterm~wmma^_10065.pdf downloaded by mkkwai from http:/petergao.net/ustpastpaper/down.php?course=CIVL253&id=0 at 2014-10-26 03:46:44. Academic use within HKUST only.
CIVL253 HYDROLOGY
Mid-term Examination (27 October 2009)
Name (English