TY - JOUR T1 - Regionalization of Rainfall Temporal Pattern in Iran TT - تعیین الگوهای توزیع زمانی بارش و ناحیه‌بندی آن در ایران JF - ijwmse JO - ijwmse VL - 3 IS - 6 UR - http://jwmsei.ir/article-1-103-en.html Y1 - 2009 SP - 66 EP - 68 KW - Rainfall Temporal Pattern KW - Rainfall KW - Regionalization and Iran. N2 - Rainfall temporal pattern has a marked influence on design of dams, urban water harvesting, culverts,drainage design, flood potential and soil erosion. In this research we used data of 146 autographic rainfallstations of Iran to implement the rainfall temporal pattern. Rainfall depth were calculated for each timeinterval from rainfall charts and were categorized to four quarters. The ranking method was used to arriveat rainfall temporal patterns corresponding to time intervals of 1,3,9 and 12 hours. After normalizing therainfall mass curves, every quarter of rainfall was ranked, number 1 for the highest. The final pattern wasderived by averaging the quarter ranks and percentage of rainfalls corresponding to each duration.Adopting Ward method, 5, 9, 9, and 8 homogeneous regions were detected for short (12 hr) rainfall time period, respectively. Design rainfall temporal pattern wasderived for every homogenous zone. There is a danger for mis-used temporal pattern by type patterns. M3 ER -