fa نقش مسلح‌شدگی بستر در استخراج روابط رژیم با استفاده از داده‌های میدانی تخصصي Special گزارش مورد case report <p>gte mso 9]><xm<illegal tag="">l> <o:officedocumentsettings> <o:relyonvml> <o:allowpng> </o:allowpng></o:relyonvml></o:officedocumentsettings> <font face="arial,helvetica,sans-serif" size="3">&nbsp;</font></xm<illegal></p> <p class="MsoNormalCxSpFirst" dir="rtl" style="margin: 0cm 3.4pt 12pt 0cm text-align: justify text-indent: 14.2pt line-height: normal direction: rtl unicode-bidi: embed"><font face="arial,helvetica,sans-serif" size="3"><b><span lang="FA" style="font-size: 12pt">توزیع اندازه ذرات رسوبی بستر رودخانه‌ها از موارد کلیدی در شناخت خصوصیات یک آبراهه بوده و<a name="OLE_LINK281"></a><a name="OLE_LINK280"><span> توسعه مسلح‌شدگی یک عامل کنترل&shy; کننده در انتقال رسوب و فرسایش بستر آبراهه&shy; های شنی می&shy; باشد.</span></a><a name="OLE_LINK285"></a><a name="OLE_LINK284"><span> در این تحقیق با </span></a><a name="OLE_LINK252"></a><a name="OLE_LINK251"><span><span><span>مطالعه صحرایی </span></span></span></a><span><span>بر روی تعدادی از رودخانه‌های کشور <a name="OLE_LINK256"></a><a name="OLE_LINK255"><span>در دو استان </span></a>خوزستان و چهارمحال‌ و ‌بختیاری، در مجموع از بستر 24 ایستگاه هیدرومتری در بازه‌های شنی 17 رودخانه، به&shy; منظور شناخت نحوه دانه‌بندی ذ<a name="OLE_LINK244"></a><a name="OLE_LINK243"><span>رات رسوبی بستر، نمونه &shy;برداری شد.</span></a></span></span><span><span> <a name="OLE_LINK292"></a><a name="OLE_LINK291"></a><a name="OLE_LINK288"></a><a name="OLE_LINK265"></a><a name="OLE_LINK264"></a><a name="OLE_LINK262"></a><a name="OLE_LINK261"><span><span><span><span><span><span>با توجه به ساختار بسترهای شنی، با استفاده از روش‌های سطحی و حجمی و با تفکیک رسوبات در سه بخش ذرات سطح ‌بستر، لایه ‌مسلح و لایه ‌زیرمسلح </span></span></span></span></span></span></a><span><span>نمونه &shy;برداری&shy;&rlm; ها انجام گردید.</span></span></span></span><a name="OLE_LINK315"></a><a name="OLE_LINK301"></a><a name="OLE_LINK298"><span><span> سپس با به&shy; کارگیری اطلاعات بدست آمده و دیگر اطلاعات موجود از مقاطع، روابط رژیم با استفاده از رگرسیون غیرخطی بدست آورده شد</span></span></a><a name="OLE_LINK318"></a><a name="OLE_LINK317"></a><a name="OLE_LINK316"></a><a name="OLE_LINK303"></a><a name="OLE_LINK302"><span><span><span><span>ه و تاثیر دانه&rlm; بندی ذرات در ساختار بستر در این روابط بررسی شده است. </span></span></span></span></a></span></b></font></p> <p><font face="arial,helvetica,sans-serif" size="3">&nbsp;</font> gte mso 9]><xm<illegal tag="">l> <w:view>Normal</w:view> <w:zoom>0</w:zoom> <w:trackmoves> <w:trackformatting> <w:punctuationkerning> <w:validateagainstschemas> <w:saveifxmlinvalid>false</w:saveifxmlinvalid> <w:ignoremixedcontent>false</w:ignoremixedcontent> <w:alwaysshowplaceholdertext>false</w:alwaysshowplaceholdertext> <w:donotpromoteqf> <w:lidthemeother>EN-US</w:lidthemeother> <w:lidthemeasian>X-NONE</w:lidthemeasian> <w:lidthemecomplexscript>AR-SA</w:lidthemecomplexscript> <w:compatibility> <w:breakwrappedtables> <w:snaptogridincell> <w:wraptextwithpunct> <w:useasianbreakrules> <w:dontgrowautofit> <w:splitpgbreakandparamark> <w:enableopentypekerning> <w:dontflipmirrorindents> <w:overridetablestylehps> </w:overridetablestylehps></w:dontflipmirrorindents></w:enableopentypekerning></w:splitpgbreakandparamark></w:dontgrowautofit></w:useasianbreakrules></w:wraptextwithpunct></w:snaptogridincell></w:breakwrappedtables></w:compatibility> <m:mathpr> <m:mathfont m:val="Cambria Math"> <m:brkbin m:val="before"> <m:brkbinsub m:val="--"> <m:smallfrac m:val="off"> <m:dispdef> <m:lmargin m:val="0"> <m:rmargin m:val="0"> <m:defjc m:val="centerGroup"> <m:wrapindent m:val="1440"> <m:intlim m:val="subSup"> <m:narylim m:val="undOvr"> </m:narylim></m:intlim></m:wrapindent></m:defjc></m:rmargin></m:lmargin></m:dispdef></m:smallfrac></m:brkbinsub></m:brkbin></m:mathfont></m:mathpr> gte mso 9]><xm<illegal tag="">l> <w:latentstyles deflockedstate="false" defpriority="99" defqformat="false" defsemihidden="true" defunhidewhenused="true" latentstylecount="267"> <w:lsdexception locked="false" name="Normal" priority="0" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="heading 1" priority="9" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="heading 2" priority="9" qformat="true"> <w:lsdexception locked="false" name="heading 3" priority="9" qformat="true"> <w:lsdexception locked="false" name="heading 4" priority="9" qformat="true"> <w:lsdexception locked="false" name="heading 5" priority="9" qformat="true"> <w:lsdexception locked="false" name="heading 6" priority="9" qformat="true"> <w:lsdexception locked="false" name="heading 7" priority="9" qformat="true"> <w:lsdexception locked="false" name="heading 8" priority="9" qformat="true"> <w:lsdexception locked="false" name="heading 9" priority="9" qformat="true"> <w:lsdexception locked="false" name="toc 1" priority="39"> <w:lsdexception locked="false" name="toc 2" priority="39"> <w:lsdexception locked="false" name="toc 3" priority="39"> <w:lsdexception locked="false" name="toc 4" priority="39"> <w:lsdexception locked="false" name="toc 5" priority="39"> <w:lsdexception locked="false" name="toc 6" priority="39"> <w:lsdexception locked="false" name="toc 7" priority="39"> <w:lsdexception locked="false" name="toc 8" priority="39"> <w:lsdexception locked="false" name="toc 9" priority="39"> <w:lsdexception locked="false" name="caption" priority="35" qformat="true"> <w:lsdexception locked="false" name="Title" priority="10" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Default Paragraph Font" priority="1"> <w:lsdexception locked="false" name="Subtitle" priority="11" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Strong" priority="22" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Emphasis" priority="20" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Table Grid" priority="59" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Placeholder Text" unhidewhenused="false"> <w:lsdexception locked="false" name="No Spacing" priority="1" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Shading" priority="60" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light List" priority="61" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Grid" priority="62" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 1" priority="63" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 2" priority="64" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 1" priority="65" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 2" priority="66" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 1" priority="67" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 2" priority="68" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 3" priority="69" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Dark List" priority="70" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Shading" priority="71" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful List" priority="72" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Grid" priority="73" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Shading Accent 1" priority="60" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light List Accent 1" priority="61" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Grid Accent 1" priority="62" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 1 Accent 1" priority="63" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 2 Accent 1" priority="64" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 1 Accent 1" priority="65" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Revision" unhidewhenused="false"> <w:lsdexception locked="false" name="List Paragraph" priority="34" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Quote" priority="29" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Intense Quote" priority="30" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 2 Accent 1" priority="66" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 1 Accent 1" priority="67" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 2 Accent 1" priority="68" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 3 Accent 1" priority="69" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Dark List Accent 1" priority="70" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Shading Accent 1" priority="71" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful List Accent 1" priority="72" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Grid Accent 1" priority="73" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Shading Accent 2" priority="60" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light List Accent 2" priority="61" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Grid Accent 2" priority="62" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 1 Accent 2" priority="63" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 2 Accent 2" priority="64" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 1 Accent 2" priority="65" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 2 Accent 2" priority="66" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 1 Accent 2" priority="67" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 2 Accent 2" priority="68" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 3 Accent 2" priority="69" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Dark List Accent 2" priority="70" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Shading Accent 2" priority="71" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful List Accent 2" priority="72" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Grid Accent 2" priority="73" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Shading Accent 3" priority="60" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light List Accent 3" priority="61" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Grid Accent 3" priority="62" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 1 Accent 3" priority="63" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 2 Accent 3" priority="64" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 1 Accent 3" priority="65" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 2 Accent 3" priority="66" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 1 Accent 3" priority="67" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 2 Accent 3" priority="68" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 3 Accent 3" priority="69" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Dark List Accent 3" priority="70" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Shading Accent 3" priority="71" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful List Accent 3" priority="72" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Grid Accent 3" priority="73" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Shading Accent 4" priority="60" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light List Accent 4" priority="61" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Grid Accent 4" priority="62" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 1 Accent 4" priority="63" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 2 Accent 4" priority="64" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 1 Accent 4" priority="65" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 2 Accent 4" priority="66" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 1 Accent 4" priority="67" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 2 Accent 4" priority="68" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 3 Accent 4" priority="69" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Dark List Accent 4" priority="70" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Shading Accent 4" priority="71" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful List Accent 4" priority="72" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Grid Accent 4" priority="73" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Shading Accent 5" priority="60" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light List Accent 5" priority="61" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Grid Accent 5" priority="62" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 1 Accent 5" priority="63" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 2 Accent 5" priority="64" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 1 Accent 5" priority="65" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 2 Accent 5" priority="66" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 1 Accent 5" priority="67" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 2 Accent 5" priority="68" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 3 Accent 5" priority="69" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Dark List Accent 5" priority="70" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Shading Accent 5" priority="71" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful List Accent 5" priority="72" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Grid Accent 5" priority="73" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Shading Accent 6" priority="60" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light List Accent 6" priority="61" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Light Grid Accent 6" priority="62" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 1 Accent 6" priority="63" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Shading 2 Accent 6" priority="64" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 1 Accent 6" priority="65" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium List 2 Accent 6" priority="66" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 1 Accent 6" priority="67" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 2 Accent 6" priority="68" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Medium Grid 3 Accent 6" priority="69" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Dark List Accent 6" priority="70" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Shading Accent 6" priority="71" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful List Accent 6" priority="72" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Colorful Grid Accent 6" priority="73" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Subtle Emphasis" priority="19" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Intense Emphasis" priority="21" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Subtle Reference" priority="31" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Intense Reference" priority="32" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Book Title" priority="33" qformat="true" semihidden="false" unhidewhenused="false"> <w:lsdexception locked="false" name="Bibliography" priority="37"> <w:lsdexception locked="false" name="TOC Heading" priority="39" qformat="true"> </w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:lsdexception></w:latentstyles> <style type="text/css">/* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal" mso-tstyle-rowband-size:0 mso-tstyle-colband-size:0 mso-style-noshow:yes mso-style-priority:99 mso-style-parent:"" mso-padding-alt:0cm 5.4pt 0cm 5.4pt mso-para-margin-top:0cm mso-para-margin-right:0cm mso-para-margin-bottom:10.0pt mso-para-margin-left:0cm line-height:115% mso-pagination:widow-orphan font-size:11.0pt font-family:"Calibri","sans-serif" mso-ascii-font-family:Calibri mso-ascii-theme-font:minor-latin mso-hansi-font-family:Calibri mso-hansi-theme-font:minor-latin} </style> </xm<illegal></w:donotpromoteqf></w:validateagainstschemas></w:punctuationkerning></w:trackformatting></w:trackmoves></xm<illegal></p> <p></p> <p align="left" class="MsoNormal" style="margin-bottom: 0.0001pt text-align: justify line-height: normal"><span new="" style="font-size: 12pt font-family: " times="">Bed material size frequency distribution of rivers is one of the key points to identify river characteristics. River bed armoring development is one of the controlling factors in sediment transporting and eroding processes of gravel bed rivers. In this research, field study was initially carried out on several gravel bed rivers in Khuzestan and Chaharmahal provinces. 24 hydrometeorological stations in 17 river reaches were sampled to characterize bed material gradation curve. With regards to bed structure of gravel bed rivers, samplings were made by surface and volumetric methods. Thereafter, sediment samples were differentiated in three categories of surface, armor and sub-armor layers. The collected field data were originally applied to derive regime relationships by using multivariate regression analysis. The effect of bed structure was directly studied in these relationships for the better understanding of that in the regime relationships.</span></p> بسترهای شنی, مسلح‌شدگی, روابط رژیم gravel bed, armoring, regime relationships 10 21 http://jwmsei.ir/browse.php?a_code=A-10-432-1&slc_lang=fa&sid=1 M.R.M Tabatabai محمدرضا مجدزاده طباطبایی m_majdzadeh@sbu.ac.ir 10031947532846009741 10031947532846009741 Yes Shahid Beheshti University پردیس فنی مهندسی شهید عباسپور - دانشگاه شهید بهشتی Reza Johari رضا جوهری rezajohari85@yahoo.com 10031947532846009742 10031947532846009742 No Shahid Beheshti University پردیس فنی مهندسی شهید عباسپور - دانشگاه شهید بهشتی Azam Masoudi اعظم مسعودی azam.masoodi@gmail.com 10031947532846009743 10031947532846009743 No Shahid Beheshti University پردیس فنی مهندسی شهید عباسپور - دانشگاه شهید بهشتی Mahsa Mahmoodi مهسا محمودی mahsa_mahmoodi_69@yahoo.com 10031947532846009744 10031947532846009744 No Shahid Beheshti University پردیس فنی مهندسی شهید عباسپور - دانشگاه شهید بهشتی