Allowance for Discretization in Hydrological and by I.J. Dwyer, D.W. Reed

By I.J. Dwyer, D.W. Reed

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This problem is quite different from the one discussed up to now in tenms of both the reason for under-estimation and the applications (those concemed with instantaneous rather than accumulated maxima). Consequently, the discussion here is brief, recognising that the problem deserves a full, separate investigation. ) measure the degree to which the maximum max(1) is under-estimated due to thinning by the factor f For positive data, 0sR(f)<1. This analysis system, of uilizing all the possible thinned records obtainable for a given thinning factor f, yields a distribution of ratios which is representative of the range of ratios to be expected.

012) Richmond, South Africa: Alt. 4 . 012) Upington, South Africa: Alt. 2 . 648 . 353 . 349 . 106 . 512 . 190 . 159 . 292 . 315 . 442 . 527 . 058 Appendix D: L-moment ratio diagrams for R(D) Graphs showing I-CV and L-skew for fixed maxima (solid lines) and sliding maxima (dotted lines) for various data records. 0 0 . 3 Melboume hourly rainfallrecordB 44 *8 5 6.

9 . 730 . 096 . . 177 . 020) 41 . . . . 021 Site-name: Leeming Location: North Yorkshire, east of Pennines Particulars: Alt. -: Melbourne Location: South east tip of Australia Particulars: 24 missing values in record B; Alt. 040) . 305 . 198 . 039 Bite-n-am: Ringway Location: Manchester airport, North-West England Particulars: Alt. 432 42 Site-name: Sydney Location: South-east coast of Australia Particulars: 133 missing values among hourly records; Alt. 028) . 323 . 005) . 227 Other daily rainfall records Record & dates mean cv skew d_( ) a(s) Alwen Reservoir, Dee, Wales: Alt.

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