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Journal Extension and Development of  Watershed Managment
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Publication Information : Volume 8 - Number 30 - Successive Number 30
Type : Research Paper
Topics of Paper : مدیریت سیلاب و خشکسالی
English Title : Monthly, Seasonal and annual Variations of Curve Number and Runoff in Bar-Ariyeh Nishabour
English Abstract : Estimating runoff from atmospheric precipitation and its quantitative understanding of various production processes is considered as one of the important issues in hydrology knowledge. Since runoff in the watershed, due to several factors influencing it, is a complex issue, therefore, it is estimated that many researches, studies and various plans for development, use of water resources and hydrostructure. According to the above mentioned it was used, rain and discharge daily data of the Bar-Ariyeh area of ​​ Razavi Korasan province were used to estimate runoff from the extracted number curve method from the Natural Soil Conservation Service (SCS-CN). For this purpose, rainfall and discharge data of Bar and Ariyeh stations during the period of 56 years and in the daily scale, the value of the curve number in the three conditions of previous moisture in low, medium and high antecedent moisture conditions of soil was evaluated. The results showed that the maximum, minimum and average values ​​of the curve number in summer and autumn were 93, 91, 92 and 85, 81, 83 percent, and in the spring and summer were 81, 79, 80 and 78, 76 and 77 percent in The domain was studied. The highest and lowest monthly average number of curve number for April and January were 93 and 76 respectively. In addition, the maximum and minimum amount of runoff was calculated for April and September with a numerical value of 12.45 and 1.29 mm in the statistical period.
English Keywords : Bar- Ariyeh watershed, Curve number, Rainfall-Runoff, Temporal variation
Refrences : Banasik K. A., Krajewski A., Sikorska., and Hejduk L. 2014. Curve number estimation for a small urban catchment from recorded rainfall-runoff events. Environmental Protection, 40(3): 75-86.


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محبوبه معتمدنیا
(Author)
1 اداره منابع طبیعی و آبخیزداری شهرستان بهاباد، یزد  mmotamednia@yahoo.com 
سید مسعود سلیمان پور 2مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان فارس  m.soleimanpour@yahoo.com 
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