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برآورد بار رسوب معلق و ارزیابی همگنی و ناهمگنی دبی و رسوب (مطالعۀ موردی: حوضۀ آبخیز کسیلیان، مازندران) | ||
| اکوهیدرولوژی | ||
| مقاله 20، دوره 7، شماره 4، دی 1399، صفحه 1099-1112 اصل مقاله (952.45 K) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ije.2020.304694.1345 | ||
| نویسندگان | ||
| اکبر نوروزی1؛ مهدی پژوهش* 2؛ خدایار عبدالهی2؛ اباذر اسمعلی عوری3 | ||
| 1دانشجوی دکترای آبخیزداری، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد، ایران | ||
| 2استادیار گروه مرتع و آبخیزداری، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد، ایران | ||
| 3دانشیار گروه مرتع و آبخیزداری، دانشکدۀ کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران | ||
| چکیده | ||
| از آنجا که بسیاری از حوضههای آبخیز کشور ایران ایستگاه رسوبسنجی ندارند، بین اندازهگیریها و برآوردهای انجامشده اختلاف زیادی مشاهده میشود. به همین دلیل، ارزیابی استفاده از مدلهای تجربی و روشهای آماری برآورد رسوب معلق انتقال رودخانهها ضروری به نظر میرسد. هدف از تحقیق حاضر، ارزیابی همگنی و ناهمگنی، روند تغییرات میزان دبی جریان و رسوب و مقایسۀ مناسب کارایی روشهای برآورد بار رسوب معلق با استفاده از منحنی سنجه در منطقۀ مطالعه‌شده است. با استفاده از نرمافزار ProUCL از طریق آزمون منـ کندال و پتیت به‌ترتیب به تغییرات روند و ارزیابی همگنی و ناهمگنی سری زمانی دبی آب و رسوب پرداخته شد. برای برآورد رسوب‌دهى معلق منحنی سنجۀ یکخطی، دوخطی و حد وسط دستهها بررسی شده و بهترین روش از میان روشهای یادشده از طریق معیار R2، NSE، RMSE و SD ارزیابی و انتخاب شد. نتایج نشان داد روش حد وسط دستهها با بیشترین کارایی به عنوان روش مناسب برای این منطقه است. همچنین، نتایج حاصل از بررسی روند تغییرات دبی جریان و رسوب با استفاده از آزمون منـ کندال با سطح 5 درصد معناداری نشان داد روند به صورت نزولی بوده و نشان‌دهندۀ تطابق تغییرات دبی و رسوب در این منطقه است. در ارزیابی آزمون پتیت مشخص شد که سری زمانی گسسته در دبی رسوب ناهمگن و در دبی آب همگن است؛ بنابراین داشتن دانشی در ارتباط با همگنی و ناهمگنی دبی جریان و رسوب میتواند برای اقدامات حفاظتی و تعدیل آثار زیستمحیطی مؤثر باشد. | ||
| کلیدواژه‌ها | ||
| آزمون پتیت؛ آزمون من- کندال؛ رسوب‌دهى معلق؛ منحنی سنجۀ رسوب؛ ناهمگنی رسوب | ||
| مراجع | ||
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