نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی اب، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران.
2 عضو هیأت علمی، گروه مهندسی آب، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران.
3 دفتر مطالعات پایه شرکت آب منطقهای استان مازندران، ساری، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Determining and predicting runoff is a crucial step in the proper use of water resources. This research aims to calibrate and validate the HEC-HMS model and simulate rainfall-runoff for continuous data series in the Tajan basin based on climate change Scenarios. In this research, the data recorded during the years 2002-2009 were used for the calibration stage and the data recorded during the years 2010-2016 were used for the verification stage. The results of model calibration showed that the correlation coefficient between observed and simulated discharge values was equal to 0.81 and the Nash-Sutcliffe coefficient was equal to 0.68, which indicates a good match between the mentioned data. Also, in the verification stage, the correlation index and Nash-Sutcliffe coefficient were equal to 0.80 and 0.63, respectively, confirming that the model shows a good estimate for the observations. In the next step, data values in the daily time scale for the period of 2020-2049 were loaded in the model and basin runoff was simulated for this period. The results showed that the amount of discharge in the future period compared to the base period would decrease strongly under both RCP 8.5 and RCP 2.6 climate change scenarios, and only in the RCP 8.5 scenario, the discharge will increase a little compared to the base period in August, September, October and November. The simulation results showed that the amount of discharge in summer and autumn under the RCP 8.5 scenario will increase more than in the RCP 2.6 scenario.
کلیدواژهها [English]