FLOOD POTENTIAL ESTIMATION OF TWO SMALL VEGETATED WATERSHEDS
DOI:
https://doi.org/10.11113/mjce.v15.15653Keywords:
Soil Conservation Service-Curve Number, GIS, Flood Event, Rational Method.Abstract
Real-time (observed) rainfall-runoff data from two small watersheds was use to estimate the flood potential of the area. The first watershed (W-1) is located in a hilly area near Serdang, Selangor. The second watershed (W-2) is a flat land of peat soil located in Pontian, Johor. A SCS (Soil Conservation Service) curve number (CN) technique, which is, considered as one of the GIS-based empirical approach was used in the study to predict daily-event storm runoff. The predicted runoff obtained from SCS-CN technique was compared with those of the observed values and from conventional Rational method. The results show that the SCS-CN technique was over-predicted for cases in W-1 watershed. Conversely, the SCS-CN was under-predicted for W-2 watershed.References
Arai, K., Ince, S., Resnik, S.D. and Marui, N. (1975) Probabilistics model of instantaneous unit hydrograph for storm runoff in semi-arid urbanized area. IASH-AISH Publ. No 117, London: Wallingford.
Bruce, A.D. and Feldman, A.D. (1992) Review of GIS application in hydrologic modelling. Water Resources Planning and Management (ASCE), 119(2): 246-261.
Capeace, J.C., Camphell, K.L. and Baldwin, L.B. (1988) Estimating runoff peak rate from flat, high water table watersheds. Transaction of the ASAE, 31(1): 74-81l.
Chow, V.T. (1964) Handbook of Applied Hydrology. New York: McGraw Hill.
Fogel, M.M. (1969) Effect of storm rainfall variability of runoff from small semiarid watershed. Transaction of the ASAE, 12(6).
Fricke, T.J. and Lewis, K.V. (1994) Flood estimation for urban areas in Peninsular Malaysia. Hydrological Procedure, No 16, Kuala Lumpur: Ministry of Agriculture.
Herwitz, S.R. (1985) Interception storage capacity of tropical rainforest canopy trees. Journal of Hydrology, 77: 237-52.
Kraatz, D.B. and Mahajan, I.K. (1972) Small Hydraulic Structure, Irrigation and Drainage. Paper No 26/2, Rome: FAO.
Linsley, R.K. and Franzni, J.B. (1979) Water Resources Engineering. 3rd edition. Singapore: McGraw-Hill.
Paramananthan, S., Jusof, S., and Nik Wan, N. M. (1979) Soil map of the Universiti Pertanian Malaysia. Tech. Bull. Soil Sci. Dept., Serdang: UPM
Pilgrim, D.H. (1987) Estimation of peak flows for small to medium sized rural catchment. Australian Rainfall and Runoff, A Guide to Flood Estimation. Brisbane: The Inst. of Engineer
Ross, M.A. and Tara, P.D. (1994) Integrated hydrologic modelling with GIS. Water Resources Journal, June: 23-30.
Sheafer, J.R., Wright, K.R., Taggart, W.C. and Wright, R.M. (1982) Urban Storm Drainage Managemen., New York: Marcel Dekker.
Soong, K.N., Haridas, G., Seng, Y.C. and Hua, T.P. (1980) Soil Erosion and Conservation in Peninsular Malaysia, Kuala Lumpur: RRIM.
Viessman, W. and Lewis, G.L. (1996) Introduction to Hydrology, 4th edition. New York: Harper-Collins.
Wilson, E. M. (1974) Engineering Hydrology. New York: Macmillan.
Zhu, T.X., Cai, Q.G. and Zeng, B.Q. (1997) Runoff generation on a semi-arid agricultural catchment: Field and experimental studies. Journal of Hydrology, 196: 99-118.
