<?xml version="1.0" encoding="utf-8"?>
<journal>
<title>Journal of Watershed Management Research</title>
<title_fa>پ‍‍ژوهشنامه مديريت حوزه آبخيز</title_fa>
<short_title>J Watershed Manage Res</short_title>
<subject>Agriculture</subject>
<web_url>http://jwmr.sanru.ac.ir</web_url>
<journal_hbi_system_id>1</journal_hbi_system_id>
<journal_hbi_system_user>admin</journal_hbi_system_user>
<journal_id_issn>2251-6174</journal_id_issn>
<journal_id_issn_online>2676-4636</journal_id_issn_online>
<journal_id_pii></journal_id_pii>
<journal_id_doi>10.61882/jwmr</journal_id_doi>
<journal_id_iranmedex></journal_id_iranmedex>
<journal_id_magiran></journal_id_magiran>
<journal_id_sid></journal_id_sid>
<journal_id_nlai></journal_id_nlai>
<journal_id_science></journal_id_science>
<language>fa</language>
<pubdate>
	<type>jalali</type>
	<year>1390</year>
	<month>2</month>
	<day>1</day>
</pubdate>
<pubdate>
	<type>gregorian</type>
	<year>2011</year>
	<month>5</month>
	<day>1</day>
</pubdate>
<volume>2</volume>
<number>3</number>
<publish_type>online</publish_type>
<publish_edition>1</publish_edition>
<article_type>fulltext</article_type>
<articleset>
	<article>


	<language>fa</language>
	<article_id_doi></article_id_doi>
	<title_fa>بررسی مقایسه ای الگوی پیچان رود با استفاده از تحلیل هندسه فراکتالی و شاخص های زاویه مرکزی و ضریب خمیدگی (مطالعه موردی: رودخانه قزل اوزن)</title_fa>
	<title></title>
	<subject_fa>تخصصي</subject_fa>
	<subject>Special</subject>
	<content_type_fa>پژوهشي</content_type_fa>
	<content_type>Research</content_type>
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&lt;p style=&quot;margin-bottom: 0.0001pt text-align: justify line-height: normal direction: rtl unicode-bidi: embed&quot; dir=&quot;rtl&quot; class=&quot;MsoNormal&quot;&gt;&lt;b&gt;&lt;span lang=&quot;FA&quot; style=&quot;font-size: 12pt font-family: &quot;2  Nazanin&quot;&quot;&gt;نظارت بر تغییرات مسیر و الگوی هندسی رودخانه ها به منظور
کسب شناخت دقیق و بررسی معضلات و مخاطرات احتمالی در جهت حفظ و بهره برداری بهینه
از منابع طبیعی ضروری می باشد و جزو اولویت های مطالعات ژئومورفولوژی است. رفتار
رودخانه ها به عنوان یکی از پدیده های طبیعی پیچیده همواره مورد توجه محققان بوده
است. محققان ژئومورفولوژی رودخانه ای همواره به دنبال روشهای جدید جهت بررسی تغییرات
رودخانه ای می باشند. براین اساس این تحقیق سعی دارد کاربرد هندسه فراکتال را در
بررسی تغییرات الگوی هندسی رودخانه قزل اوزن&lt;span&gt; &lt;/span&gt;نشان دهد. هدف این تحقیق مقایسه نتایج هندسه فراکتال با نتایج شاخص های
ضریب خمیدگی و زاویه مرکزی در برسی تغییرات الگوی هندسی رودخانه می باشد. بدین
منظور از تصاویر ماهواره ای &lt;/span&gt;&lt;/b&gt;&lt;b&gt;&lt;span style=&quot;font-size: 10pt font-family: &quot;Times New Roman&quot;,&quot;serif&quot;&quot; dir=&quot;ltr&quot;&gt;ETM+&lt;/span&gt;&lt;/b&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;&lt;b&gt;&lt;span lang=&quot;FA&quot; style=&quot;font-size: 12pt font-family: &quot;2  Nazanin&quot;&quot;&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt; و &lt;/span&gt;&lt;/b&gt;&lt;b&gt;&lt;span style=&quot;font-size: 10pt font-family: &quot;Times New Roman&quot;,&quot;serif&quot;&quot; dir=&quot;ltr&quot;&gt;IRS&lt;/span&gt;&lt;/b&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;&lt;b&gt;&lt;span lang=&quot;FA&quot; style=&quot;font-size: 12pt font-family: &quot;2  Nazanin&quot;&quot;&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;
در سه دوره زمانی 2000، 2004 و 2007 استفاده شد، جهت بررسی تغییرات مسیر مورد
مطالعه به سه بازه تقسیم گردید، سپس با استفاده از شاخص های ضریب خمیدگی، زاویه
مرکزی و تحلیل هندسه فراکتالی تغییرات الگوی هندسی رودخانه در بازه زمانی مورد
مطالعه استخراج گردید. برای تعیین بعد فراکتالی از روش بعد شمارش خانه و برای
تعیین خاصیت فراکتالی از مولفه های&lt;/span&gt;&lt;/b&gt;&lt;span dir=&quot;ltr&quot;&gt;&lt;/span&gt;&lt;b&gt;&lt;span lang=&quot;FA&quot; style=&quot;font-size: 10pt font-family: &quot;Times New Roman&quot;,&quot;serif&quot;&quot; dir=&quot;ltr&quot;&gt;&lt;span dir=&quot;ltr&quot;&gt;&lt;/span&gt; &lt;/span&gt;&lt;/b&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;&lt;b&gt;&lt;span lang=&quot;FA&quot; style=&quot;font-size: 12pt font-family: &quot;2  Nazanin&quot;&quot;&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;&lt;span&gt; &lt;/span&gt;&lt;/span&gt;&lt;/b&gt;&lt;b&gt;&lt;span style=&quot;font-size: 10pt font-family: &quot;Times New Roman&quot;,&quot;serif&quot;&quot; dir=&quot;ltr&quot;&gt;a&lt;/span&gt;&lt;/b&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;&lt;b&gt;&lt;span lang=&quot;FA&quot; style=&quot;font-size: 12pt font-family: &quot;2  Nazanin&quot;&quot;&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;
و &lt;/span&gt;&lt;/b&gt;&lt;b&gt;&lt;span style=&quot;font-size: 10pt font-family: &quot;Times New Roman&quot;,&quot;serif&quot;&quot; dir=&quot;ltr&quot;&gt;R&lt;/span&gt;&lt;/b&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;&lt;b&gt;&lt;span lang=&quot;FA&quot; style=&quot;font-size: 12pt font-family: &quot;2  Nazanin&quot;&quot;&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt; استفاده گردید. میزان انحرافات بازه
های مورد نظر نیز به وسیله مولفه &lt;/span&gt;&lt;/b&gt;&lt;b&gt;&lt;span style=&quot;font-size: 10pt font-family: &quot;Times New Roman&quot;,&quot;serif&quot;&quot; dir=&quot;ltr&quot;&gt;C&lt;/span&gt;&lt;/b&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;&lt;b&gt;&lt;span lang=&quot;FA&quot; style=&quot;font-size: 12pt font-family: &quot;2  Nazanin&quot;&quot;&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;
تعیین شد و برای تشخیص میزان تغییرات، بعد فراکتالی &lt;/span&gt;&lt;/b&gt;&lt;b&gt;&lt;span style=&quot;font-size: 10pt font-family: &quot;Times New Roman&quot;,&quot;serif&quot;&quot; dir=&quot;ltr&quot;&gt;D&lt;/span&gt;&lt;/b&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;&lt;b&gt;&lt;span lang=&quot;FA&quot; style=&quot;font-size: 12pt font-family: &quot;2  Nazanin&quot;&quot;&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;
بازه ها مقایسه گردید. نتیجه این تحقیق نشان داد که بازه اول، بیشترین میزان تغییرات
را داشته و بازه دوم کمترین میزان تغییرات را در طول سالهای مورد مطالعه داشته
است. این تحقیق نشان داد که نتایج شاخص های ضریب خمیدگی و زاویه مرکزی در بررسی تغییرات الگوی هندسی رودخانه کاملاً
مطابق با تغییرات استخراج شده با هندسه فراکتال می باشد. بنابراین هندسه فراکتالی
می تواند به عنوان روش ریاضی مناسب جهت بررسی های ژئومورفولوژی رودخانه ها بکار گرفته
شود.&lt;span&gt; &lt;/span&gt;&lt;/span&gt;&lt;/b&gt;&lt;b&gt;&lt;span style=&quot;font-size: 10pt font-family: &quot;Times New Roman&quot;,&quot;serif&quot;&quot; dir=&quot;ltr&quot;&gt;&lt;/span&gt;&lt;/b&gt;&lt;/p&gt;

&lt;/div&gt;&lt;div style=&quot;text-align: right&quot;&gt; &lt;/div&gt;</abstract_fa>
	<abstract></abstract>
	<keyword_fa>تغییرات الگوی هندسی، ضریب خمیدگی، زاویه مرکزی، هندسه فراکتال، رودخانه قزل اوزن</keyword_fa>
	<keyword></keyword>
	<start_page>1</start_page>
	<end_page>18</end_page>
	<web_url>http://jwmr.sanru.ac.ir/browse.php?a_code=A-10-1-17&amp;slc_lang=fa&amp;sid=1</web_url>


<author_list>
	<author>
	<first_name></first_name>
	<middle_name></middle_name>
	<last_name></last_name>
	<suffix></suffix>
	<first_name_fa>محمد حسین</first_name_fa>
	<middle_name_fa></middle_name_fa>
	<last_name_fa> رضایی مقدم</last_name_fa>
	<suffix_fa></suffix_fa>
	<email></email>
	<code>1003194753284600573</code>
	<orcid>1003194753284600573</orcid>
	<coreauthor>Yes
</coreauthor>
	<affiliation></affiliation>
	<affiliation_fa></affiliation_fa>
	 </author>


	<author>
	<first_name></first_name>
	<middle_name></middle_name>
	<last_name></last_name>
	<suffix></suffix>
	<first_name_fa>محمد رضا</first_name_fa>
	<middle_name_fa></middle_name_fa>
	<last_name_fa> ثروتی</last_name_fa>
	<suffix_fa></suffix_fa>
	<email></email>
	<code>1003194753284600574</code>
	<orcid>1003194753284600574</orcid>
	<coreauthor>No</coreauthor>
	<affiliation></affiliation>
	<affiliation_fa></affiliation_fa>
	 </author>


	<author>
	<first_name></first_name>
	<middle_name></middle_name>
	<last_name></last_name>
	<suffix></suffix>
	<first_name_fa>صیاد</first_name_fa>
	<middle_name_fa></middle_name_fa>
	<last_name_fa> اصغری سراسکانرود</last_name_fa>
	<suffix_fa></suffix_fa>
	<email></email>
	<code>1003194753284600575</code>
	<orcid>1003194753284600575</orcid>
	<coreauthor>No</coreauthor>
	<affiliation></affiliation>
	<affiliation_fa></affiliation_fa>
	 </author>


</author_list>


	</article>
</articleset>
</journal>
