شبیه‌سازی دو بعدی دما و شوری در خلیج گرگان در خلال دوره یک ساله 1390

نوع مقاله : مقاله کامل علمی - پژوهشی

نویسنده

نویسنده مسئول، مربی، هیأت علمی، گروه تولید و بهره‌برداری آبزیان، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

10.22069/japu.2022.19585.1612

چکیده

در پژوهش حاضر نتایج شبیه‌سازی دو بعدی دما و شوری در خلیج گرگان در خلال دوره یک‌ساله 1390 بررسی گردیده است. برای اجرای مدل مایک 21 از داده‌های جهت و سرعت باد، تبخیر و بارش، رطوبت نسبی، ورودی رودخانه‌ها، دمای آب و هوا، شوری، تابش طول موج‌های کوتاه و بلند در درون خلیج و هم‌چنین از داده‌های دما، شوری و نوسان سطح آب در دهانه آشورآده-بندرترکمن استفاده شده است. مدل با بهینه‌سازی ضرایب پسای باد، مقاومت بستر و ضرایب پخش شوری، تضعیف نور و گرمای نهان تبخیر تنظیم گردیده و با استفاده از داده‌های میدانی دما و شوری درستی‌یابی شد. نتایج پژوهش نشان داد که میزان دما و شوری در خلیج در تمام فصول سال دارای روند افزایشی از سمت شرق به غرب است. بیشینه اختلاف دما بین بخش‌های شرقی و غربی 5/3 درجه سانتیگراد است. بیشینه اختلاف دمای شبانه‌روزی در خلیج گرگان 4 درجه سانتی‌گراد است. تغییرات دما و شوری در منتهی‌الیه غربی خلیج به‌دلیل افزایش زمان تعویض محلی آب زیاد است. تغییرات شوری در سواحل جنوبی خلیج متاثر از ورودی رودخانه‌ها است و میزان شوری در نواحی مصبی 4 پی‌اس‌یو است. نظر به کاهش سطح آب و حرکت توده‌های آب خلیج از غرب به شرق در فصل زمستان، مقادیر شوری در نواحی عمیق و مرکزی خلیج در خلال این دوران در مقایسه با فصول دیگر با بیشینه 5/16 پی‌اس‌یو دارای روند افزایشی است. بیشینه شوری برابر 1/21 پی‌اس‌یو و در بخش غربی خلیج گرگان است.

کلیدواژه‌ها


عنوان مقاله [English]

Two Dimensional Simulation of Temperature and Salinity in the Gorgan Bay in During 2010-2011.

نویسنده [English]

  • saeed sharbaty
Corresponding Author, Instructor, Faculty of Member, Dept. of Fisheries, Gorgan University Agricultural Sciences and Natural Resources, Iran
چکیده [English]

In the present study, the results of two-dimensional simulation of temperature and salinity have been investigated in the Gorgan Bay during one-year period of 2011-2012. In order to implement Mike 21 model, wind speed and direction, evaporation and precipitation, relative humidity, rivers inflow, air and water temperature, salinity, short and long wavelengths as well as temperature, salinity and water level fluctuations has been used in the open boundary of the model. The model was adjusted with optimization of wind drag, bed resistance and salinity dispersion, attenuation light intensity and latent heat coefficients, and verificated using salinity and temperature field data. The results of simulation showed that salinity and temperature values in the Bay have an increasing trend from east to west in all seasons. The maximum temperature difference between the eastern and western parts of the Gorgan Bay is 3.5 degrees Celsius. The maximum temperature difference between day and night in the Gorgan bay is 4 degrees Celsius. Temperature and salinity changes in the western part of the bay are significant due to the increase in local water change time. Salinity change in the southern shores of the bay is affected by river inflows and salinity in the estuarine area is 4 PSU. Due to the decrease in water level and the movement of bay water masses from west to east in winter, salinity values in the deep and central areas of the bay during this period compared to other parts with a maximum of 16.5 PSU has an increasing trend. The maximum salinity is 21.1 PSU in the western part of the bay.

کلیدواژه‌ها [English]

  • Gorgan Bay
  • Mike 21
  • Temperature
  • Salinity
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