زمان در سیستم‌های ژئومرفیک

نوع مقاله: مقاله علمی پژوهشی

نویسندگان

1 استاد دانشکدة علوم جغرافیا و برنامه‌ریزی دانشگاه اصفهان

2 استادیار دانشکدة علوم جغرافیا و برنامه‌ریزی دانشگاه اصفهان

3 دانشجوی دکتری ژئومرفولوژی دانشگاه اصفهان

چکیده

یکی از مفاهیم بنیادین در ژئومرفولوژی، که بسیاری از نظریه‌پردازی‌ها بر اساس آن استوار شده، مفهوم زمان است. مفاهیمی چون یونیفورمی تاریانیسم، دور جغرافیایی، و ارگودیسیتی از نظریه‌هایی هستند که سعی در بیان نحوة تحولات ارضی در بستر زمان دارند. ولی مبنای کار همة آن‌ها بر مفهوم زمان رخدادی استوار است. سازگارنبودن مفهوم زمان نجومی با بسیاری از رخدادها و فرایند‌های طبیعی سبب شده تا ژئومرفولوژیست‌ها به مفهوم زمان رخدادی بیشتر توجه کنند. با توجه به اینکه به مفهوم زمان در ادبیات ژئومرفولوژی کمتر توجه شده، ضمن ارائة دقیقی از معنی و مفهوم این واژه در ژئومرفولوژی، کاربرد آن در مباحث زمین‌ریخت‌شناسی تبیین شد و با اتکا به یک آزمون آزمایشگاهی رابطة زمان استمرار شوک با زمان لختی، زمان واکنش، و زمان پاسخ در یک سیستم محیطی استخراج شد. نتایج این پژوهش نشان می‌دهد سیستم‌ها به هر شوکی با هر استمرار زمانی واکنش نشان نمی‌دهند. افزایش زمان استمرار شوک با زمان واکنش سیستم رابطه‌ای دوال دارد. هرگاه زمان استمرار شوک با زمان واکنش برابر شود، زمان تأخیری برابر صفر می‌شود و زمان تأخیری با میزان شدت شوک رابطة معکوس دارد.
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Time in geomorphic systems

نویسندگان [English]

  • Mohammad Hossein Ramesht 1
  • Mojgan Entezary 2
  • Sosan Delsoz 3
1 Professor, Faculty of Geographical Sciences and Planning, Isfahan University, Iran
2 Assistant Professor, Faculty of Geographical Sciences and Planning, Isfahan University, Iran
3 Ph.D. in Geomorphology, Isfahan University, Iran
چکیده [English]

Introduction
The complexity of the phenomenon of time and its meaning has always been considered an obstacle to understanding the nature of time. Time is an important phenomenon in detailed discussions about its nature, particularly in philosophy and physics filed. Sun, Earth and rotations should be considered a major factor in the definition of the concept of astronomical time. The effect of twenty-four-hour in organisms is consisted of the large part of their biological activities. Even questions about the latitude of more than 70 degrees as well. This question is deeply connecting us to other concepts of time events.
The geomorphologists believed that the time shows the range changes and evolution of landscape. The evolution of natural phenomena over time can be oriented in the form of different models to examine and evaluate the concept can be interpreted mother theory of harvest of the main geomorphology. It is explicitly said that there is three major intellectual (historical method, dynamic method and the perspective of a systematic) approaches accidentally caused by different interpretations of the concept of time by geomorphologist.
 
Methodology
The experience allowed the time and its implications in perspective (Graph 1977) requires an experimental model to determine when concepts such as delay time, reaction time, relaxation time and  response time, and their relation to the shock time with different magnitude assessed to check it to achieve this goal for a drainage  basin Laboratory.
Model provision (watershed) in a rectangular shape with dimensions of 162 cm long and 215 wide is carried. After modeling to measure the intensity of the rains, an artificial rain system was built that can control the intensity and time precipitation ratio was propelled to evaluate them.
For avoidance of any error, the irrational numbers were used for the shock time. Irrational numbers were selected from 3 to 101 and the consequent in three separate stages for shock rainfall intensity one liter per minute, 3.8 min and 6 liters per minute. The data used in this study, quantitative data with zero mathematical scalar time in three separate phases in the model was implemented. A total of 260 measurements were obtained and their calculation  was done in three months. The breakdown of the figures, the relationship between the persistence of shocks time when other
The elements were extracted based on matrix tables (4) and (5) and (6), and seven models of relationship surveys.
 
Results and Discussion
According to the matrix of the relationship between the persistence of the shock in the magnitude of one, 3.8 liter and six Liter were analyzed and after testing seven models 30 various manners were obtained. This should be noted that 7 out of 30 were not significant and 23 were attained meaningful relationship.
 
Conclusions
 Geomorphic systems and change in their attitudes and behavior with a variable time is not explaining several concepts used to express them. The task assigned to the variable time with different concepts shock time, latency, response time, response time and rest time and matter is expressed in relation to this issue.  This states that these variables can be together because these relationships may indicate a various states in one hand and on the other hand it estimated prediction behavior.
The phase one, two and three field pilot test shock magnitude in 1 liter, 3.8 and 6 min indicate that the continuation of the shock relations is by other concepts the second time on the complex relations and the truth of the relationship provided up to certain extent. Each system can be described with the general rule for any kind of shock to be evaluated in a press statement.
The relations obtained in the first phase include three linear and quadratic five relationships as the following key results.
Systems don’t reaction to every Shook Time
With increase in Shook Time, Reaction Time decreases.
The relationship between Shook Time and Reaction Time is dual. 
If Shook Time and Reaction Time are equal, the Memory Time will be zero.    
The relation between Delay Time and magnitude of Shook Time is in inverse directions. 

کلیدواژه‌ها [English]

  • attachments area
  • geomorphology
  • place
  • space- identity
  • time

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