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پهنه بندی مکانی فرسایش خاک با مدل RUSLE; مطالعه موردی زیرحوضه کویته (پاکستان) | ||
هیدروژئومورفولوژی | ||
دوره 11، شماره 41، دی 1403، صفحه 86-67 اصل مقاله (1.94 M) | ||
نوع مقاله: پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/hyd.2024.62212.1744 | ||
نویسندگان | ||
مریم بیاتی خطیبی* 1؛ عماد علی2 | ||
1استاد گروه سنجش از دور دانشکده برنامه ریزی وعلوم محیطی دانشگاه تبریز | ||
2دانشجوی دکتری، دانشکده برنامه ریزی وعلوم محیطی، دانشگاه تبریز | ||
چکیده | ||
حوضه فرعی کویته بخشی از حوضه رودخانه پیشین است که در منطقه جنوب غربی پاکستان واقع شده است. این مطالعه با هدف تعیین توزیع مکانی فرسایش سالانه خاک با استفاده از مدل معادله جهانی تلفات خاک (RUSLE) انجام شد. برای انجام این کار، تکنیکهای داده کاوی متعدد، همراه با الگوریتمهای یادگیری ماشین، برای تولید لایههای موضوعی (K، R، LS، C، و P) که بهعنوان پارامترهای ورودی برای مدل RUSLE عمل میکردند، استفاده شد. بر اساس مدل حاصل، فرسایش خاک در منطقه مورد مطالعه از 00/0 تا 866 تن در هکتار در سال متغیر بود. مقادیر برآورد شده برای فرسایش بارندگی-رواناب (R)، خاک. فرسایش پذیری (K)، توپوگرافی (LS) و مدیریت پوشش (C)، عوامل از 147 تا 191 (MJ.mm.ha-1.h-1year-1)، 0.0229 تا 0.0259 (t.ha.MJ-1mm) متغیر بودند. ⁻1)، 0.002 تا 360.77 و 0.001 تا 1 به ترتیب. آمارها نشان داد که 58 درصد از اراضی منطقه مورد مطالعه درجه بسیار پایینی از فرسایش خاک را با نرخ فرسایش کمتر از 13.58 تن در هکتار در سال تجربه میکنند. حدود 24 درصد از منطقه مورد مطالعه با فرسایش کم مواجه است که نرخ فرسایش بین 13.58-44.16 تن در هکتار در سال است. 13 درصد از منطقه با شدت فرسایش متوسط خاک، با نرخ فرسایش 44.16-81.53.14 تن در هکتار در سال مشخص شده است. | ||
کلیدواژهها | ||
فرسایش خاک؛ مدل RUSLE؛ GIS؛ داده های مکان مبنا؛ زیر حوضه کویته | ||
مراجع | ||
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