# C5304 - Hydrology (Kertas soalan politeknik-politeknik malaysia kejuruteraan awam)

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C5304 - Hydrology semester december 2010

### Text of C5304 - Hydrology (Kertas soalan politeknik-politeknik malaysia kejuruteraan awam)

treLrYffir{m;KiEXAMINATION AND EVALUATION DIVISION DEPARTMENT OF POLYTECHNIC EDUCATION (MINISTRY OF HIGHER EDUCATION)

CIVL ENGINEERING DEPARTMENTFINAL EXAMTNATION DECEMBER 20IO SESSION

C5304: HYDROLOGYDATE: 20 APRIL 2011 (WEDNESDAY) DURATION: 2 I{O{IRS (8.30am _ 10.30am)

This paper consists of SEVEN (7) pages including the front page.Structure / Essay euestion: (6 questiorrs _ answer 4 questions)

2O1T DO NOT OPEN THIS QUESTION TAPNN UNTIL TNSTNUCTED BY THE

CONFIDENTIAL UNTIL 20 APRIL CHIEF INVIGILATOR

CONFIDENTIALC5304; Hydr.ology

Q{rEsTroN r(a) State Fo{.rR

(4) characteristics of rainfail and the measurement unit.(6 marks)

.@

m3/sand the averageannuar rainfail is 20 cm, estimate the evapotranspiration losses for the area in cm/year.

The drainage area of a vitage is 2.59 determined to be I g.g2

x r0r0 m2.rf themean annuar runoff is

(g marks)

(c)

'" ii. iii.

sketch the hydrologic cycle process and explain the components below: EvaporationSurface

runoff

Infiltration

(llQUESTTON 2(a)

marks)

Precipitation can be divided into two categories which are liquid and frozen. Explain TWO (2) fypes from each category.(8 marks)

(b)

Compute the mean areal precipitation for the following data in Table 2 using the Polygon Thiessen method.

Area of

ttriessenTolffi

(7 marks)

Page 2

of

7

CONFIDENTIALC5304: Hydrology

(c)

Precipitation station F was inoperative for a month. A storm occurred during this time. The precipitation recorded during the storm at five su*ounding stations A, B, C, D and E were 15.3 cm, 17.1 cm,l4.0 cm,l3.5 cm, and 16.7 cm respectivery. one quadrant has been drawn on topography map and the coordinate in cm for the stations are A(5,3), 8(4,_6), C(g,ll), D(-2,_g), E(10,4)' Determine the missing precipitation varue at station F.

p{

(10 marks)

QUESTTON 3

Taking the rates of cu'ent meter as is in rev/s' calcurate the stream Table 3a.

V:0.05 + 0.gN, where v

is in m/s and N

flow according to the foilowing observations in

Distance from

river bank, m0.61.2

Depth,m1,0

Uurrent meter depth, mU.6 D

Revolutions

Time,s50

l530 48 40 6045

4"0

J.2 L) u.6t_)

/-

55 53

2.0

5.5

+.4

t)

46

1.1 D

3.0

-'544852

o.)

5.2 D

t.3 D3.8

61JJ

4.s

J.6u.9

t_)

5450

t)

5l2644

4.5

2.5

z.u t)

4855

u.) l)5.01.0U.O L)

20

47

Table 3a (10 marks)

Page 3

of7

CONFlDENTIALC5304: Hydrology

Table 4a

./

Determine ordinate UH-6h, assuming the base flow is 150 m3ls. (12 marks)

,"(

Calculate and check the data is hydrograph unit. (3marks)

(b/

Table 4b shows the ordinate 2hr

_

4hr - UH using S-Curved Method.

UH for Kota Bharu area. Find the ordinate

Table 4b (10 marks)

Page 5

of7

CONF]DENTIAL

\

C5304: Hydrology

1o' ;ffiL:"ow

shows the intensirv of rainfau during 6 hours srorm in rhe area

I (mmlhr)

If the observations of runoff

i.

w as 2640ha_meter, calculate:

Index-phi (A) for this area.(12 marks)

u.

Total loss(3 marks)

QUESTION

4

,W

Table 4a shows the discharge of a river l rrvvr catchment in tl waleurutrnr tn the area of I I50 km2, due to 6 hours rain storm.

Time (hr)

Discharge 1m3/s;

Page 4

of

7

CONF]DENTIALC5304: Hydrology

QUESTTON s

Muskinghum method is commonry used in hydrorogic routing method for handling a variable discharge storage rerationship. Assuming k : 6 hours, x : 0.25 and firsr outflow is 35m3/s. Using the Muskinghum method,Route the following inflow hydrograph (21 marks) lt. PIot outflow hydrograph based on Table 5 marks)

Inflow (m3ls)

Page 6

of 7

CONF]DENTIALC5304: Hydrology

QUESTTON 6

a)

of

Urban Storm water Management Manual

(5 Marks)

b)

Determine the design peak for flow generated from minor drainage of high density residentiar area of 20 hectares in Kuara Lumpur. Assume 100 m of overland flow folrowed by 300 m of flow in an open drain" The catchment arca average slope = 0.2o/o.(20 Marks)

PageT of7

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