ارزیابی روش برآورد هدررفت خاک با شاخص‏های میدانی (مطالعة موردی: حوضة آبخیز شهرک، طالقان)

غضنفرپور, نیره; فیض نیا, سادات; احمدی, حسن; جعفری, محمد; نصری, مسعود

doi:10.22059/jrwm.2015.56139

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ دکتری دانشکدة منابع طبیعی دانشگاه تهران

² استاد گروه احیای مناطق خشک و کوهستانی، دانشکدة منابع طبیعی دانشگاه تهران

³ استادیار دانشگاه آزاد اسلامی، واحد اردستان

https://doi.org/10.22059/jrwm.2015.56139

چکیده

برآورد مقادیر هدررفت خاک از طریق اندازه‏گیری شاخص‏های میدانی روشی کم‏هزینه و برای یادگیری و استفادة کاربران آسان است. به منظور اندازه‏گیری و ارزیابی مقادیر هدررفت خاک برآوردشده با روش شاخص‏های میدانی در حوضة آبخیز شهرک، نخست نقشة واحدهای کاری تهیه و شاخص‏های میدانی در واحدهای کاری اندازه‏گیری شد. پس از واسنجی و اعتبارسنجی مدل EPM برای منطقة مورد مطالعه، صحت مقادیر هدررفت خاک اندازه‏گیری‌شده با شاخص‏های میدانی با استفاده از مدل تجربی مذکور ارزیابی شد. مقدار میانگین خطای نسبی کم (برابر 6_/7) و ضریب همبستگی بالا (برابر 9_/0) بین مقادیر هدررفت خاک برآوردشده به روش شاخص‏های میدانی و مدل EPM نشان‌دهندة صحت روش شاخص‏های میدانی در برآورد هدررفت خاک منطقة مورد مطالعه است. مقادیر میانگین فرسایش خاک مربوط به شاخص رخنمون سنگ 61_/47 تن در هکتار، تجمع رسوب پشت مانع 78_/34 تن در هکتار، پدستال 61_/22 تن در هکتار، فرسایش شیاری 67_/5 تن در هکتار، زهکش اراضی 21_/2 تن در هکتار و فرسایش خندقی 17_/2 تن در هکتار به‏دست آمد.

کلیدواژه‌ها

عنوان مقاله [English]

Assessment of soil loss estimation method by field indicators (Case study: Shahrak Watershed, Taleghan Basin)

نویسندگان [English]

Nayereh Ghazanfarpour ¹
Sadat Feiznia ²
Hassan Ahmadi ²
Mohammad Jafari ²
Masoud Nasri ³

¹ PhD, Natural Resources Dept., University of Tehran

² , Natural Resources Dept., University of Tehran

³ Associate Professor, Islamic Azad University, Ardestan

چکیده [English]

Estimation of the amount of soil loss measurement of field indicators is a low-cost method, is easy to learn and can be simply applied. In order to measure and make assessment of soil loss amount by field indicators method in Shahrak Watershed, first map of the work units was prepared and then, measurements of the relevant field indicators were carried out within these units. Then, EPM model was calibrated and verified. Then the measured data for the amount of the soil loss obtained by using field indicators were analysed and assessed using EPM experimental model. Mean of relative error and correlation coefficient between values from filed indicators method and EPM model were around 7.6 and 0.9, respectively which these results verify field indicators method for estimation of soil loss intensity. Estimation of the average of soil loss amounts relevant to each of the field indicators shows the following soil losses: Rock exposure indicator: 47.61 (ton/ha), Pedestal indicator: 22.61 (ton/ha), Rill indicator: 5.67 (ton/ha), Sediment in drains indicator: 2.21 (ton/ha), Gully indicator: 2.17 (ton/ha) and Build up against barriers indicator: 34.78 (ton/ha).

کلیدواژه‌ها [English]

Field indicators
Soil loss
EPM experimental model
Shahrak Watershed

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نشریه علمی - پژوهشی مرتع و آبخیزداری

ارزیابی روش برآورد هدررفت خاک با شاخص‏های میدانی (مطالعة موردی: حوضة آبخیز شهرک، طالقان)

مراجع

مراجع

دوره 68، شماره 3 - شماره پیاپی 3
مهر 1394
صفحه 589-606

ارزیابی روش برآورد هدررفت خاک با شاخص‏های میدانی (مطالعة موردی: حوضة آبخیز شهرک، طالقان)

مراجع

مراجع

دوره 68، شماره 3 - شماره پیاپی 3مهر 1394صفحه 589-606

دوره 68، شماره 3 - شماره پیاپی 3
مهر 1394
صفحه 589-606