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مهار آهنگ رشد آبکند‌ها با استفاده از محلول اشباع آهک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار پژوهشکده حفاظت خاک و آبخیزداری، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

2 دانشیار پژوهشکده حفاظت خاک و آبخیزداری، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

3 کارشناس ارشد پژوهشکده حفاظت خاک و آبخیزداری، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

چکیده

فرسایش آبکندی فرآیند مهم و عمده تخریب اراضی و از مهم­­ترین منابع فرسایش و تولید رسوب در کشور محسوب می­شود. هدف از این پژوهش، تعیین تأثیر محلول سیرشده آهک در کاهش آهنگ رشد آبکند­ها بود. پس از مکان­یابی دو آبکند فعال با خصوصیات فیزیوگرافی و خاک­شناسی مشابه در یکی از مناطق آبکندی استان تهران و ثبت مشخصه­های فیزیوگرافی و خاک­شناسی، یکی به­عنوان شاهد و دیگری به­عنوان تیمار در نظر گرفته شد. اثر حجم محلول سیرشده آهک و زمان نگهداشت در اصلاح مقاومت تک‌محوری خاک آبکند، مورد بررسی و آزمایش قرار گرفت. برای تزریق محلول آهک، یک حوضچه نواری پیرامون آبکند، ایجاد و به­میزان حجم بهینه محلول سیرشده آهک در سطح حوضچه تخلیه شد. سپس در دوره­های شش­ماهه رشد طولی و حجمی آبکند­ها تعیین و نتایج با یکدیگر مقایسه شد. نتایج تأثیر حجم محلول سیرشده آهک بر مقاومت خاک آبکند در زمان نگهداری ثابت، نشان داد که حداکثر افزایش مقاومت خاک به­میزان 420% نمونه شاهد، با تزریق 40 برابر حجم تخلخل خاک به­دست آمد. نتایج بررسی تأثیر زمان نگهداری بر میزان افزایش مقاومت خاک، حداکثر افزایش مقاومت در دوره نگهداری 60 روز و به­میزان 400% را نشان داد. همچنین، آبکند تثبیت‌شده 58% کاهش رشد طولی و 83% کاهش رشد حجمی داشت.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Controlling the Growth Rate of Gullies Using Lime Saturated Solution

نویسندگان [English]

  • Rahim Kazemi 1
  • Reza Bayat 1
  • Ziaoddin Shoaei 2
  • Seyyed-Reza Imam-Jome 3

1 Assist. Professor, Soil Conservation and Watershed Management Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran

2 Assoc. Professor, Soil Conservation and Watershed Management Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran

3 Expert, Soil Conservation and Watershed Management Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran

چکیده [English]

Gully erosion is an important and major process of land destruction and is considered one of the most important sources of erosion and sediment production in the country. The purpose of this research was to determine the effect of saturated lime solution (SLS) in reducing the growth rate of gullies. After locating two active gullies with similar physiographic and soil characteristics in one of the gully areas of Tehran province and recording the physiographic and soil characteristics, one was considered as a control and the other as a treatment. The effect of volume of SLS and curing time in improving the uniaxial strength of gully soil was investigated and tested. To inject SLS, a strip pond was created around the gully and the optimal volume of SLS was discharged on the surface of the pond. Then, in six-month periods, the length and volume growth of gullies were measured and the results were compared with each other. The results of the effect of the volume of SLS on the uniaxial strength of gully soil during constant curing time showed that the maximum increase in soil strength by 420% of the control sample was obtained by injecting 40 times the volume of soil porosity. The results of the study of the effect of curing time on the soil strength showed the maximum increase in the 60-day curing period and as much as 400%. Also, the stabilized gully had a 58% decrease in longitudinal growth and an 83% decrease in volume growth.

کلیدواژه‌ها [English]

  • Erosion
  • Porosity
  • Stabilization
  • Strength
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محیط زیست و مهندسی آب
دوره 8، شماره 3
مهر 1401
صفحه 669-681
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  • تاریخ دریافت: 04 آبان 1400
  • تاریخ بازنگری: 22 آذر 1400
  • تاریخ پذیرش: 23 آذر 1400
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