نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار پژوهشی بخش تحقیقات حافظت خاک و آبخیزداری، مرکز تحقیقات، آموزش کشاورزی و منابع طبیعی کرمان، سازمان تحقیقات، آموزش و ترویج

2 دانشیار دانشکده منابع طبیعی و علوم دریایی دانشگاه تربیت مدرّس، مازندران، نور، خیابان امام خمینی، دانشکده منابع طبیعی و علوم دریایی

3 استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران

4 دانشیار دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرّس، مازندران، نور، ایران

چکیده

بارش اسیدی یکی از عوارض زندگی صنعتی است که از نظر جغرافیائی در سال‌های اخیر گسترش وسیعی پیدا کرده و مورد توجه بسیاری از محققین قرار گرفته است . این بارش‌ها اثرات قابل توجهی بر اکوسیستم‌‌های مختلف کره زمین دارند. در این تحقیق به منظور بررسی حساسیت به رواناب و تولید رسوب نهشته های سازند گچساران به بارش اسیدی و تغییر غلظت آن، بخشی از حوزه آبخیزکوه گچ در شهرستان ایذه با مساحت 1202 هکتار انتخاب گردید. این تحقیق به منظور تعیین رواناب و رسوب تولیدی در 8 نقطه و با 3 بار تکرار در سازند گچساران در شدت های مختلف 1 و 25/1 میلیمتر در دقیقه و در غلظت های آب مقطر و اسیدیته 4 و 5 در چهار جهت شمالی، جنوبی، شرقی و غربی به کمک دستگاه باران ساز کامفورست انجام شد. به منظور انجام و تحلیل‌های آماری از نرم افزارهای SPSS و EXCEL استفاده گردید. بیشترین میزان رواناب و رسوب در سازند گچساران در شدت های 1 و 25/1 میلی متر در دقیقه مربوط به بارش با اسیدیته 4 می باشد. بارش با اسیدیته 5 نیز رواناب و رسوب بیشتری نسبت به بارش با آب مقطر نشان داد. نفوذ پذیری نیز در غلظت های مختلف بارش اختلاف معنی داری را نشان داد. بیشترین حساسیت به فرسایش و تولید رسوب به بارش اسیدی را نیز دامنه های شرقی از خود نشان دادند.

کلیدواژه‌ها

عنوان مقاله [English]

Acidic Rainfall Effect on Erodibility of slope main Aspects in Gachsaran formation (A case study: Kuhe Gach Watershed Area in Izeh Township)

نویسندگان [English]

  • hamzeh saeediyan 1
  • Hamid Reza Moradi 2
  • Sadat Feiznia 3
  • nader Bahramifar 4

1 Research Assistant Professor, Department of Soil Conservation and Watershed Management Research, Kerman Agricultural and Natural Resource Research Center, Agricultural Research, Education and Extension Organization, Kerman, Iran.

2 Associate professor, Department of watershed management engineering, college of natural resource, Tarbiat modares university, Noor, Iran,

3 Professor, Department of watershed management engineering, college of natural resource, Tehran university, Iran, Sfeiz@ut.ac.ir

4 Associate professor, college natural resource of Tarbiat modares university, Noor, Mazandaran, Iran

چکیده [English]

Acidic rainfall is one of the complications of industry life that a point of view geographically in recent years spread widely and the attention of many researchers has been found. These rains have significant effects on the different ecosystems of earth. In this study, in order to investigate the sensitivity of erosion and sediment yield of Gachsaran Formation to acidic rainfall and its density change, parts of the Kuhe Gach watershed area in Izeh Township are selected with the area of 1202 hectares. This investigation in order to determine productivity runoff and sediment in 8 points and with 3 replicates in Gachsaran formation in different intensities 1, 1/25 mm in min and in the intensities of distilled water and 4, 5 acidic water in four aspects of northern, southern, eastern, western with using kamphorst rain simulator was done. In order to analyze statistical was used SPSS and EXCEL packages. The highest of runoff and sediment rates in Gachsaran formation in 1, 1/25 mm in min are related to 4 acidic rainfalls. The rainfall of 5 acidic also runoff and sediment are more than the rain of distilled water. The infiltration rates in rainfall different intensities also showed a significant difference.

کلیدواژه‌ها [English]

  • Key words: Soil erosion
  • Acidic rainfall
  • Gachsaran formation
  • Kamphorst rain simulator
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