تحلیل فراکتالی تغییرات بافت لسهای استان گلستان | ||
| مهندسی اکوسیستم بیابان | ||
| مقاله 4، دوره 10، شماره 31، شهریور 1400، صفحه 43-58 اصل مقاله (628.71 K) | ||
| شناسه دیجیتال (DOI): 10.22052/deej.2021.10.31.31 | ||
| نویسندگان | ||
| سمیه قندهاری1؛ آرش امینی* 2؛ علی سلگی1؛ حامد رضایی2 | ||
| 1دانشگاه آزاد اسلامی واحد علوم و تحقیقات | ||
| 2دانشگاه گلستان | ||
| چکیده | ||
| استفاده از تحلیل فراکتال بهعنوان روشی متفاوت از روشهای معمول در بررسی ویژگیهای لسها بهخصوص در یکی از گستردهترین پهنههای لسی ایران که بهعنوان حلقۀ ارتباطی بین لسهای آسیای مرکزی و اوراسیا نیز شناخته میشود، ضروری و پراهمیت تلقی میگردد. بنابراین هدف از این مقاله، تحلیل فراکتال توزیع اندازۀ ذرات با ویژگیهای بافتی لسهای استان گلستان است. در این تحقیق، از 16 ایستگاه نواحی لسی استان گلستان نمونهبرداری شد و نمونهها از طریق دانهبندی و فراکتال مطالعه شدند. سپس کاربرد فراکتال توزیع اندازۀ ذرات و فراکتال شمارش جعبهای در شناسایی تغییرات پس از رسوبگذاری لسها و ارتباط مقادیر فراکتال با پارامترهای بافتی نظیر جورشدگی، کجشدگی و کشیدگی بررسی شد. نتایج ابعاد فراکتال توزیع اندازۀ ذرات نشان داد لسهای منطقۀ ۱ بیشترین پدوژنز را تحمل کرده و دارای DbH بالاتری هستند. با افزایش DbH جورشدگی ذرات کاهش مییابد و شاخص کشیدگی کمتر شده و پهنشدگی منحنی بیشتر میشود. ایستگاههای آلاگل، آلماگل و کمربندی آققلا با جورشدگی بهتر، میانگین اندازۀ دانۀ بیشتر، دارای ابعاد فراکتال DbH پایینتر از سایر نقاط هستند. همچنین ابعاد فراکتال توزیع اندازۀ ذرات و هندسه فراکتالی ذرات بر اساس روش شمارش جعبهای نتایج همدیگر را تأیید میکنند. | ||
| کلیدواژهها | ||
| تحلیل بافتی؛ فراکتال توزیع اندازۀ ذرات؛ فراکتال شمارش جعبههای تفاضلی؛ لس | ||
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| مراجع | ||
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