تحلیل آماری رابطه‌های هندسی- هیدرولیکی رودخانه‌ها (مطالعه موردی: رودخانه فیروزه- شاهجوب بجنورد)

نویسندگان

چکیده

مطالعه سیستم‌های رودخانه‌ای از جنبه‌های مختلف محیط طبیعی شامل هیدرولوژی،‏ هیدرولیک،‏ فرآیندهای فرسایش و رسوب‌گذاری و همچنین شکل کانال‌های رودخانه‌ای است. بین تغییرات ایجاد شده در متغیرهای مستقل و واکنش متغیرهای وابسته همواره تأخیر زمانی وجود دارد که با مقادیر و حدود تغییرات در متغیرهای مستقل و قابلیت تغییرپذیری متغیرهای وابسته کنترل می‌شود. در این پژوهش،‏ برای بررسی خصوصیات هندسی و هیدرولیکی مقاطع عرضی رودخانه فیروزه- شاهجوب در استان خراسان شمالی بعد از تحلیل نتایج خروجی از مدل هیدرولیکیHEC-RAS ،‏ برای دبی با دوره بازگشت 10 ساله برای 37 بازه که در طول رودخانه انتخاب شده بود،‏ اقدام شد. بهترین معادله از بین رابطه‌های رگرسیونی که دارای کمترین خطای استاندارد،‏ کمترین مقدار P-value و ضریب تشخیص بالاتر بود،‏ انتخاب شد. نتایج پژوهش نشان داد که معادله نمایی به‌عنوان معادله مناسب‌تر برای رابطه‌های ژئومتری - کانال برای رودخانه مورد مطالعه است که دارای خطای استاندارد 010‎/0،‏ ضریب تشخیص 88‎/0 و P-value 002‎/0 نسبت به سایر مدل‌ها بود.

کلیدواژه‌ها


عنوان مقاله [English]

Statistical approach rivers Geometric-Hydraulic relationships (case study: Firooze - shahjoob River)

نویسندگان [English]

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چکیده [English]

To Study river systems different element of eco-system including hydrology, hydraulic, erosion processes sedimentation and river geometry should be taken under consideration. There is a time delay between changes taken place at independent variables and response of dependent variables, that by values and changes ranges and varability of ability is controlled. This research, for review geometric and hydraulic specifications of river, Firooze - shahjoob river in province North Khorasan was chosen. After analyze out put results of hydraulic model HEC-RAS, for discharge with return period 10 year for 37 reach during the river was action .The best equation from among regression relationships that including minimum standard error, minimum probability value and maximum coefficient of determination is selected. Result of research showed that power equations as more appropriate equation for relationships geometry-channel for river under study, that including minimum standard error, maximum coefficient of determination and p-value less than 0.1 than other models.The river systems study of different aspects of the natural environment includes hydrology, hydraulic, erosion processes sedimentation and river geometry, there is always a time delay between changes in the independent variables and response of dependent variables, that is controlled by values and changes ranges in the independent variables and also flexibility in depended variables. In this study, after analyzing the result of HEC-RAS hydraulic model for 10 years discharge in 37 reaches, the geometric and hydraulic characteristics of cross sections of Firooze - Shahjoob River in the province of North Khorasan were studied. The best equation was chosen among all of the regression equations that have the lowest standard deviation and p-value, and also has the highest coefficient of determination. The results showed that the exponential equation was the most appropriate equation for presenting the geometry channel relations of the studied river which had a standard error of 0.010, coefficient of determination of 0.88 and p-value 0.002 compared to other models.

The river systems study of different aspects of the natural environment includes hydrology, hydraulic, erosion processes sedimentation and river geometry, there is always a time delay between changes in the independent variables and response of dependent variables, that is controlled by values and changes ranges in the independent variables and also flexibility in depended variables. In this study, after analyzing the result of HEC-RAS hydraulic model for 10 years discharge in 37 reaches, the geometric and hydraulic characteristics of cross sections of Firooze - Shahjoob River in the province of North Khorasan were studied. The best equation was chosen among all of the regression equations that have the lowest standard deviation and p-value, and also has the highest coefficient of determination. The results showed that the exponential equation was the most appropriate equation for presenting the geometry channel relations of the studied river which had a standard error of 0.010, coefficient of determination of 0.88 and p-value 0.002 compared to other models.

The river systems study of different aspects of the natural environment includes hydrology, hydraulic, erosion processes sedimentation and river geometry, there is always a time delay between changes in the independent variables and response of dependent variables, that is controlled by values and changes ranges in the independent variables and also flexibility in depended variables. In this study, after analyzing the result of HEC-RAS hydraulic model for 10 years discharge in 37 reaches, the geometric and hydraulic characteristics of cross sections of Firooze - Shahjoob River in the province of North Khorasan were studied. The best equation was chosen among all of the regression equations that have the lowest standard deviation and p-value, and also has the highest coefficient of determination. The results showed that the exponential equation was the most appropriate equation for presenting the geometry channel relations of the studied river which had a standard error of 0.010, coefficient of determination of 0.88 and p-value 0.002 compared to other models.

The river systems study of different aspects of the natural environment includes hydrology, hydraulic, erosion processes sedimentation and river geometry, there is always a time delay between changes in the independent variables and response of dependent variables, that is controlled by values and changes ranges in the independent variables and also flexibility in depended variables. In this study, after analyzing the result of HEC-RAS hydraulic model for 10 years discharge in 37 reaches, the geometric and hydraulic characteristics of cross sections of Firooze - Shahjoob River in the province of North Khorasan were studied. The best equation was chosen among all of the regression equations that have the lowest standard deviation and p-value, and also has the highest coefficient of determination. The results showed that the exponential equation was the most appropriate equation for presenting the geometry channel relations of the studied river which had a standard error of 0.010, coefficient of determination of 0.88 and p-value 0.002 compared to other models.

کلیدواژه‌ها [English]

  • HEC-RAS-Regression relationshipsTjjkkTl
  • -.Geometric and hydraulic characteristics river-Regression relationshipsTjjkkTl
  • HEC-RAS-