Appendix R — One-Hour Rainfall
Gazette pages 4998–4999 · Official gazette pages (PDF, 1 MB) — use for exact tables and figures.
One hour rainfall values for a 25-year return period for various locations in Bangladesh may be taken from Figure 8.R.1. The figure shows different regions of equal rainfall intensity as well as isohyets at 5 mm intervals. Rainfall for a particular location shall be obtained as follows:
(a) When the location lies within any region (shown shaded in the map), the value marked for that region shall be taken.
(b) For a location lying on any isohyet in this map, the value of that isohyet shall be taken.
(c) For a location lying outside the positions (a) and (b) above, linear interpolation shall be made between the adjacent isohyets to obtain the required rainfall value.
Figure 8.R.1 One-hour rainfall (in mm) map for Bangladesh
Source: Bangladesh National Building Code 2020, S.R.O. No. 55-Law/2020, Bangladesh Gazette (Extraordinary), 11 February 2021. Tables, figures and equations: refer to the linked gazette pages.