Hydrologic design, planning, and management of water resources projects usually require the knowledge of Intensity-Duration-Frequency (IDF) relationships in mathematical or graphical form. In many countries the data scarcity in this regard poses a serious challenge. Generally, for an ungauged location, simple estimates based on the neighboring stations or similar locations are used to develop IDF relationships. The present study aims at developing IDF relationships at various rainfall measuring stations in Sultanate of Oman using Gumbel’s distribution method. A total of 51 gaging stations having at least 12 years of data (excluding missing data) were selected. The maximum rainfall depth values were determined for seven different durations (5, 15, 30, 60, 360, 720, 1440 minutes) and for six return periods (2, 5, 10, 25, 50, 100 years). Bernard’s model was adopted to develop IDF relationships for all the stations based on the results generated from the measured data. The parameters of the IDF relationships were calculated by regression and the contour maps for all the parameters were drawn for determining the IDF relationships for ungauged locations. Finally, these contour maps are validated using the IDF relationships of some of the stations.
|عنوان منشور المضيف||International Conference on Advances in Civil and Construction Engineering (ACCE)|
|المحررون||Syed Ali Rizwan, Shahid Ali, Asif Naseer|
|حالة النشر||Published - ديسمبر 1 2022|