مدل‌سازی آماری حجم پیکان‌های ماسه‌ای گونه Seidlitzia Florida (مطالعه موردی: ریگ نجارآباد)

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری ژئومرفولوژی دانشگاه تربیت مدرس، تهران، ایران

2 استادیار، گروه آموزشی زمین شناسی، دانشگاه خوارزمی، تهران. ایران

3 استاد، دانشکده جغرافیا، دانشگاه تهران، ایران

4 استادیار، بخش تحقیقات حفاظت خاک و آبخیزداری، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان اصفهان، سازمان تحقیقات، آموزش و ترویج کشاورزی، اصفهان، ایران

چکیده

بحران‌های محیطی و هدر رفت منابع طبیعی از عوامل اصلی ایجاد سیستم‌های مدیریت محیطی می‌باشند. مدیریت بهینه منابع طبیعی نیازمند ارزیابی و طبقه‌بندی پتانسیل‌های محیطی و اکولوژیکی می‌باشد. یکی از مهمترین ناهمواری‌های بادی ریگ نجارآباد در شمال شرقی روستای طرود پیکان ماسه‌ای است. در این پژوهش، مولفه‌های مرفومتریک و مرفولوژیک پیکان‌های ماسه‌ای و میزان افزایش حجم سالیانه آنها در یک بازه زمانی یکساله اندازه‌گیری شده است. سپس با استفاده از روش آنالیز رگرسیون نوع و شدت ارتباط بین میزان افزایش حجم پیکان ماسه‌ای و مولفه‌های مرفومتریک و مرفولوژیک پیکان‌های ماسه‌ای بررسی و به منظور برآورد میزان حجم ماسه، مدل‌هایی ارائه شده است. مولفه‌های مرفومتریک شامل طول پیکان، حداکثر عرض پیکان و مولفه‌های مرفولوژیک شامل ارتفاع گیاه، قطر تاج پوشش و قطر طوقه گیاه می‌باشد. با استفاده از این مدل‌ها می‌توان میزان حجم پیکان‌های ماسه‌ای منطقه مورد مطالعه را به آسانی محاسبه نمود. نتایج بیانگر این است که ارتباط بین میزان افزایش حجم و مولفه‌های مرفومتریک و مرفولوژیک پیکان‌های ماسه‌ای از روابط خطی، توانی و نمایی پیروی می‌کند. نتایج بیانگر حداکثر ارتباط خطی بین حجم پیکان ماسه‌ای با قطر تاج پوشش با بیشترین ضریب تعیین (۸۰۷/۰) و کمترین انحراف معیار برآورد (۱۱۳/۰) می‌باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Statistical modeling of sand arrows volume of Seidlitzia florida (Case study: Njarabad ‎Erg)‎

نویسندگان [English]

  • alireza arabameri 1
  • Khalil Rezaie 2
  • Mojtaba Yamani 3
  • Kourosh Shirani 4
1 PhD Student of Geomorphology, Tarbiat Modares University, Tehran, Iran
2 Assistant Professor of sedimentology, Kharazmi University, Tehran, Iran
3 Professor, Faculty of Geography, University of Tehran, Tehran, Iran
4 Assistant Professor, Soil Conservation and Watershed Management Research Department, Isfahan Agricultural and Natural Resources Research and Education Center, AREEO, Isfahan, Iran
چکیده [English]

    Environmental crises and loss of natural resources are among the main causes of the establishment of environmental management systems. The optimal management of natural resources requires the assessment and classification of environmental and ecological potentials. Sand arrow is ‎one of the most important accumulations landforms in Njarabad Erg in the northeastern of Toroud ‎village. In this research, the morphometric and morphological parameters of the ‎sand arrows and increase of their volume in the one-year period were measured. Then, using the regression analysis method, the type, and intensity of the relationship between the amount of increase in the volume of the sand arrow and the morphometric and morphological parameters of the sand arrows were investigated and the models were presented to estimate the sand volume. Morphometric parameters include the length and maximum width of ‎the sand arrow and morphological parameters include height, canopy diameter and crown diameter of the plant. These models can easily calculate the volume of sand arrows in the study area. The results indicate that the relationship between the amount of volume increase and the morphometric and morphological parameters of the sand arrows follows the linear, power and exponential functions. The results show the maximum linear correlation between the volume of the sand arrows with canopy diameter with the highest R2 (0.807) and the lowest Std error of the estimation (0.13). The results of this study, primarily inform environmental managers about the state of the sand arrows system and secondly, as a tool for serving environmental managers, express the trend and extent of the landscape of the sand arrows in different time periods.

کلیدواژه‌ها [English]

  • modeling
  • morphometric characteristic
  • morphologic characteristic
  • Sand Arrow
  • ‎Njarabad Erg
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