Answer all the questions. Please arrange your answer properly. b. Figure Q3(b) a

Question

Answer all the questions. Please arrange your answer properly.

b. Figure Q3(b) and Table Q3(b) shows the Sungai Ular catchmcnt arca at Kulim, Kedah. The catchmen t characteristics are given o The Catchment Area is 2.72 km2 o The main channel length is 1.5 km. o Catchment area average slope is 5% & assume so-0.008 o Manning's n 0.045 o Landuse: Bare Loam, Suburban residential with Fruit Orchards. o Typical main channel condition: Assume rectangular channel, width = 4.5 m & depth : 1.50 m. Design the peak flow generated from a minor system (ARI 5 years) using Rational Method. (CL.O4:PL.O3-C5) (10 marks) 250 Figure Q3(b) Sungai Ular Catchment Area (Kulim) Table Q3(b) Location & Station ID Derived parameters Kuala Nerang 54.8490.174 0.250 0.810 (6206035)

Explanation / Answer

Answer:

The flow of water in catchment is depend upon number of channels it have. Meaning, if the area have sufficient channels to flow then intensity of flow of water would be less than the area having less channels.

Peak discharge (by rational method)= CiA

Where, C = runoff coefficient, i= rainfall intensity, A= area of catchment.

Put the values in above equation to get peak discharge.

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