نویسندگان
1
علوم و مهندسی آبخیز، دانشکده منابع طبیعی و علوم دریایی نور، دانشگاه تربیت مدرس تهران
2
استاد گروه آبخیزداری، دانشگاه تربیت مدرس
3
تربیت مدرس
چکیده
امروزه برای مقابله با حوادث متأثر از تخریب و بهبود عملکرد آبخیزها، اقدامات آبخیزداری بهعنوان رهیافتی مدیریتی و اجرایی توسط مدیران و سیاستگذاران مورداستفاده قرارگرفته است. لذا در این پژوهش سعی شده است میزان اثربخشی اقدامات زیستی و مهندسی پیشبینیشده در آبخیز افین در شهرستان زیرکوه استان خراسان جنوبی بر متغیرها و خدمات هیدرولوژیک مورد ارزیابی قرار گیرد. بر این اساس اطلاعات مرتبط از سازمانهای مربوطه اخذ و مورداستفاده قرار گرفت. در این پژوهش تغییر متغیرهای CN، NDVI و شیب آبراهه اصلی موردبررسی قرار گرفت و اثر آنها بر زمان تمرکز، ارتفاع و حجم رواناب تعیین شد. نتایج پژوهش حاکی از آن است که پس از اجرای اقدامات آبخیزداری، CN از 1/38 تا 29/92 درصد کاهش، NDVI از 42/44 تا 87/50 درصد افزایش و شیب آبراهه نیز 66/67 درصد کاهش مییابد. همچنین ارتفاع و حجم رواناب نیز از 7/51 تا 76/66 درصد کاهش مییابد. اجرای اقدامات آبخیزداری نقش متفاوتی در زیرآبخیزهای مختلف داشته است و با توجه به شرایط و وضعیت زیرآبخیزها، اثربخشی آن متفاوت بوده است. لذا پیشنهاد میگردد در راستای مدیریت بهتر و برخورداری از بازدهی بیشتر راهکارهای اجرایی، مدیریت جامع حوزه آبخیز با رویکرد سلامتمحور موردتوجه مسئولین و مدیران قرار گیرد.
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