PERMOHONAN KEBENARAN MERANCANG UNTUK CADANGAN MENDIRIKAN:- 1 BLOK PANGSAPURI
PERKHIDMATAN 28 TINGKAT YANG MENGANDUNGI
i) 1 TINGKAT LOBI DAN KEDAI/PEJABAT (1 UNIT)
ii) 9 TINGKAT TEMPAT LETAK KENDERAAN
iii) 1 TINGKAT KEMUDAHAN REKREASI
iv) 18 TINGKAT PANGSAPURI PERKHIDMATAN (332 UNIT)
DI ATAS LOT 2398, 2656, 2657, 2658, 2659, 2660, 2661, 2662, 2663, 2664, 2665 & 2666, JALAN TUNKU ABDUL RAHMAN,
SEKSYEN 1, BANDAR GEORGETOWN, D.T.L., PULAU PINANG.
= 0.7 ha
DESIGN RAINFALL
In accordance with Urban Stormwater Management Manual for Malaysia (MSMA Second edition 2012)
5 minute rainfall ; 10 minute rainfall ;
State;
Penang Penang
Station name Tangki Air Bedar Sg Pinang Tangki Air Bedar Sg Pinang
Storm duration; t = 5 min t = 10 min
Return period for rainfall; Period = 10 yr Period = 10 yr
From Appendix 2.B - IDF constant λ; λ = 67.949 λ = 67.949
From Appendix 2.B - IDF constant κ; κ = 0.181 κ = 0.181
From Appendix 2.B - IDF constant θ; θ = 0.299 θ = 0.299
From Appendix 2.B - IDF constant η; η = 0.736 η = 0.736
Peak rainfall intensity; I = λ × (T/1yr)κ / (t/1hr + θ)η × 1mm/hr I = λ × (T/1yr)κ / (t/1hr + θ)η × 1mm/hr
I = 209.09 mm/hr I = 180.84 mm/hr
Design runoff
* biggest value of I selected for the design purpose
Catchment ground description Bare soil (no cover)
time, t = 5 minute
period = 10 years
Catchment area; A= = 7000 m2
Runoff coefficient (Table 2.5); C= = 0.8
I = 209.09
Design runoff (rational method); Q=C×I×A = 0.325251 m3/s
Determine the Drain size using manning (400mm)
Area m2 0.6 0.6 0.36
Wetted Perimeter m 0.5 0.6 0.5 1.6
Hydraulic Radius 0.22 0.37
Slope,s 1 300 0.003333 0.057735
Capacity of drain m3/sec 0.88 > 0.33 1
