AI SearchAreal distribution of short durations rainfall over Bangkok
Call Number: AIT Thesis no. 318 Material type:
TextSeries: Asian Institute of Technology. Thesis ; no. 318Publication details: Bangkok : Asian Institute of Technology, 1971Description: 53 leavesSubject(s): Online resources: Dissertation note: Thesis (M.Eng.) - Asian Institute of Technology, 1971 Summary: Areal variations of short duration rainfall of {u00BD}-hr., 1-hr., 2-hr. and 24-hr. are examined in terms of inter-station correlations over Bangkok having an area of 300 km². Since the number of automatic recording gages are not sufficient to describe the areal patterns of the first three durations, a method of reducing the daily records of the standard raingages to these durations is used. Inter-station correlation coefficients are computed for the 55-raingage network. They are then transformed to the Fisher's z-values. These transformed coefficients of correlation are found to diminish gradually with distance. The variation is reasonably explained for all the four durations by the selected functions: z = Ae -Bx and Z = C + D tn x , where Z is the transformed coefficient of correlation, x is the interstation distance in kms, and A,B,C,D are coefficients.
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A thesis submitted in partial fulfillment of the requirements for the Degree of master of Engineering of the Asian Institute of Technology, Bangkok, Thailand.
Thesis (M.Eng.) - Asian Institute of Technology, 1971
Areal variations of short duration rainfall of {u00BD}-hr., 1-hr., 2-hr. and 24-hr. are examined in terms of inter-station correlations over Bangkok having an area of 300 km². Since the number of automatic recording gages are not sufficient to describe the areal patterns of the first three durations, a method of reducing the daily records of the standard raingages to these durations is used. Inter-station correlation coefficients are computed for the 55-raingage network. They are then transformed to the Fisher's z-values. These transformed coefficients of correlation are found to diminish gradually with distance. The variation is reasonably explained for all the four durations by the selected functions: z = Ae -Bx and Z = C + D tn x , where Z is the transformed coefficient of correlation, x is the interstation distance in kms, and A,B,C,D are coefficients.
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