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treLrYffir{m;K i EXAMINATION AND EVALUATION DIVISION DEPARTMENT OF POLYTECHNIC EDUCATION (MINISTRY OF HIGHER EDUCATION) CIVL ENGINEERING DEPARTMENT FINAL EXAMTNATION DECEMBER 20IO SESSION C5304: HYDROLOGY DATE: 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) CONFIDENTIAL UNTIL 20 APRIL 2O1T DO NOT OPEN THIS QUESTION TAPNN UNTIL TNSTNUCTED BY THE CHIEF INVIGILATOR

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

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C5304 - Hydrology semester december 2010

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Page 1: C5304 - Hydrology (Kertas soalan politeknik-politeknik malaysia kejuruteraan awam)

treLrYffir{m;Ki

EXAMINATION AND EVALUATION DIVISIONDEPARTMENT OF POLYTECHNIC EDUCATION

(MINISTRY OF HIGHER EDUCATION)

CIVL ENGINEERING DEPARTMENT

FINAL EXAMTNATIONDECEMBER 20IO SESSION

C5304: HYDROLOGY

DATE: 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)

CONFIDENTIAL UNTIL 20 APRIL 2O1TDO NOT OPEN THIS QUESTION TAPNN UNTIL TNSTNUCTED BY THECHIEF INVIGILATOR

Page 2: C5304 - Hydrology (Kertas soalan politeknik-politeknik malaysia kejuruteraan awam)

(a)

CONFIDENTIAL

C5304; Hydr.ology

Q{rEsTroN r

State Fo{.rR (4) characteristics of rainfail and the measurement unit.

(6 marks)

The drainage area of a vitage is 2.59 x r0r0 m2.rf themean annuar runoff isdetermined to be I g.g2 m3/sand the averageannuar rainfail is 20 cm, estimatethe evapotranspiration losses for the area in cm/year.

Precipitation can be divided into two categoriesExplain TWO (2) fypes from each category.

which are liquid and frozen.

(b) Compute the mean areal precipitationthe Polygon Thiessen method.

(8 marks)

for the following data in Table 2 using

.@

(g marks)

(c) sketch the hydrologic cycle process and explain the components below:'" Evaporation

ii. Surface runoffiii. Infiltration

(ll marks)

QUESTTON 2

(a)

Area of ttriessenTolffi

(7 marks)

Page 2 of 7

Page 3: C5304 - Hydrology (Kertas soalan politeknik-politeknik malaysia kejuruteraan awam)

CONFIDENTIALC5304: Hydrology

(c) Precipitation station F was inoperative for a month. A storm occurred duringthis time. The precipitation recorded during the storm at five su*oundingstations A, B, C, D and E were 15.3 cm, 17.1 cm,l4.0 cm,l3.5 cm, and 16.7cm respectivery. one quadrant has been drawn on topography map and thecoordinate 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 V:0.05 + 0.gN, where v is in m/s and Nis in rev/s' calcurate the stream flow according to the foilowing observations inTable 3a.

Table 3a

(10 marks)

Distance from

river bank, mDepth,m

Uurrent meter

depth, mRevolutions Time,s

0.6 1,0 U.6 D l5 501.2 4"0 J.2 L) 30 /- 55

u.6 t_) 48 532.0 5.5 +.4 t) 40 46

1.1 D 60 -'543.0 o.) 5.2 D 45 48

t.3 D 61 523.8 4.s J.6 t_) JJ 54

u.9 t) 5l 504.5 2.5 z.u t) 26 48

u.) l) 44 555.0 1.0 U.O L) 20 47

Page 3 of7

Page 4: C5304 - Hydrology (Kertas soalan politeknik-politeknik malaysia kejuruteraan awam)

(b/

CONFlDENTIAL

Table 4b shows the ordinate 2hr _

4hr - UH using S-Curved Method.

Table 4a

Determine ordinate UH-6h, assuming the base flow is 150 m3ls../

,"( Calculate and check the data is hydrograph unit.

C5304: Hydrology

(12 marks)

(3marks)

UH for Kota Bharu area. Find the ordinate

(10 marks)

Table 4b

Page 5 of7

Page 5: C5304 - Hydrology (Kertas soalan politeknik-politeknik malaysia kejuruteraan awam)

CONF]DENTIAL

\ C5304: Hydrology

1o' ;ffiL:"ow shows the intensirv of rainfau during 6 hours srorm in rhe area

If the observations of runoff w as 2640ha_meter, calculate:i. Index-phi (A) for this area.

(12 marks)

u. Total loss

(3 marks)

QUESTION 4

,W Table 4a shows the discharge of a river catchment in tlto 6 hours rain storm.

l rrvvr waleurutrnr tn the area of I I50 km2, due

I (mmlhr)

Time (hr) Discharge 1m3/s;

Page 4 of 7

Page 6: C5304 - Hydrology (Kertas soalan politeknik-politeknik malaysia kejuruteraan awam)

CONF]DENTIAL

QUESTTON s

Muskinghum method is commonry used in hydrorogic routing methodvariable discharge storage rerationship. Assuming k : 6 hours, x :outflow is 35m3/s. Using the Muskinghum method,

Route the following inflow hydrograph

lt. PIot outflow hydrograph based on Table 5

C5304: Hydrology

for handling a

0.25 and firsr

(21 marks)

marks)

Inflow (m3ls)

Page 6 of 7

Page 7: C5304 - Hydrology (Kertas soalan politeknik-politeknik malaysia kejuruteraan awam)

CONF]DENTIAL

QUESTTON 6

C5304: Hydrology

a) state FI\aE (5) advantages of Urban Storm water Management Manual(MsMA).

(5 Marks)

b) Determine the design peak for flow generated from minor drainage of highdensity residentiar area of 20 hectares in Kuara Lumpur. Assume 100 m ofoverland flow folrowed by 300 m of flow in an open drain" The catchmentarca average slope = 0.2o/o.

(20 Marks)

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