دوره 9، شماره 17 - ( بهار و تابستان 1397 )
جلد 9 شماره 17 صفحات 192-182 |
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Jabale A, Najafinejad A, Hosseinalizadeh M, Mohammadian Behbahani A, Golkarian A. (2018). The role of Vegetation in Production Runoff and Sediment in Loess Deposits, Gorgan
. J Watershed Manage Res. 9(17), 182-192. doi:10.29252/jwmr.9.17.182
URL: http://jwmr.sanru.ac.ir/article-1-835-fa.html
URL: http://jwmr.sanru.ac.ir/article-1-835-fa.html
جبله علی، نجفی نژاد علی، حسینعلی زاده محسن، محمدیان بهبهانی علی، گلکاریان علی. نقش پوشش گیاهی در تولید رواناب و رسوب اراضی لسی گرگان پژوهشنامه مديريت حوزه آبخيز 1397; 9 (17) :192-182 10.29252/jwmr.9.17.182
1- دانشگاه علوم کشاورزی و منابع طبیعی گرگان
2- دانشگاه فردوسی
2- دانشگاه فردوسی
چکیده: (3817 مشاهده)
دامنه های زراعی لسی سالانه حجم زیادی از رواناب و رسوب را به داخل شهر گرگان وارد کرده که به دلیل سیستم زهکش نامناسب، خسارات مالی زیادی را به دنبال دارد. هدف از این تحقیق بررسی اثر سناریوهای مختلف پوشش گیاهی بر میزان رواناب و رسوب خروجی سه دامنه آبخیزی با مساحت 5/9 هکتار میباشد. بنابراین مقدار رواناب و رسوب حوزه برای مدت یک سال توسط مدل WEPP شبیهسازی و با نتایج شبیه‌ساز باران در سطح پلات مقایسه گردید. درمجموع هشت سناریوی رایج پوشش گیاهی شامل شرایط فعلی، حداقل و حداکثر پوشش گیاهی محتمل و وجود و عدم وجود پوشش گیاهی یک‌ساله و دائمی شبیهسازی شده و به‌صورت جفتی مورد مقایسه قرار گرفت. حجم رواناب کل و رسوب ویژه برای وضعیت کنونی حوزه به ترتیب 1945 مترمکعب در سال و 1/5 تن در هکتار برآورد گردید. نتایج مقایسه سناریوها نشان داد که میزان رواناب و رسوب ویژه حوزه به ترتیب از 1487 مترمکعب در سال و 4/0 تن در هکتار در سناریوی حداکثر پوشش گیاهی محتمل (بیش از 80 درصد)، به 5032 مترمکعب در سال و 5/64 تن در هکتار در سناریو حداقل پوشش گیاهی محتمل (آیش همراه با شخم) حوزه افزایش می‌یابد. همچنین اختلاف رسوب ویژه بین دو سناریوی پوشش دائمی گراس و زراعت جو کل حوزه معادل 8/12 تن در هکتار و این مقدار برای دو سناریوی زراعت جو و آیش همراه با شخم اراضی کشاورزی حوزه 2/10 تن در هکتار محاسبه شد.
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