A Study Of Some Hydrological Aspects For Spillway Design of A Small Dam In The North of Iraq


This research is to evaluation and analyzing the main aspects of spillway designfor Chaq-Chaq dam in north of Iraq in Suleimaniya governorate, with help of thehydraulic, hydrologic and climate data collecting. Four different distribution modelsare used in order to conduct the analysis required to find the different return periodsof flood, based on the expected daily rainfall depth, also the result was comparedwith the study of Sogreah consulting company .Analysis of data shows that thelength of the spillway of Chaq-Chaq dam should be increased by about 206% toaccommodate the maximum flood discharge according to Extreme Value type Idistribution with return period of 1000 year.