نوع مقاله : ویژه نامه دریاچه ارومیه
1 دانشجوی دکتری مهندسی منابع آب، دانشگاه ارومیه
2 استاد/گروه مهندسی آب، دانشگاه ارومیه
3 دانش آموخته دکتری مهندسی منابع آب، دانشگاه ارومیه
عنوان مقاله [English]
The change in the behavior of river flow due to the occurrence of climate change in the past years has led to an increase in extreme hydrological events such as flash floods with high sediments, which has made it very important to know the different characteristics of river sediments for planning and designing water structures. In this study, a new Standardized Sediment Index (SSI) was developed and different characteristics of sediment, including probability density function (PDF), magnitude, intensity, etc., were carried using a Monte Carlo simulation process in the western of Lake Urmia basin. For this purpose, first, the sediment data was determined according to different models of rating curve, and then the synthetic data series of sediment (1000 series) were generated using a suitable stochastic model and were used to determine different characteristics of sediment. The results showed that in most stations, the method of estimating the rating relationship according to the innovative method of this study, i.e. using the flow discharge index method to classify the relationship between flow and sediment; has the first priority in performance compared to other methods proposed in different studies. Also, the PDF of sediment data completely follows the normal distribution, which indicates that probability density function of sediment events as expected from a normalized natural process has a systematic behavior with skewness data.