The Effects of Surface Soil Characteristics on Length Expansion Gullies in Different Climates of Fars Province

Abstract:
One of the most significant water erosion is gully erosion that leads to creating problems and losses. This kind of erosion has special importance because of sediment production and major damages to lands، highways and civil projects. Fars province has gully erosion in six regions. In this study، 30 active gullies were recognized in selecting one region in each climate. Gully progress by means of historical documents such as aerial images and topographic maps and field studies was determined. In watershed located on headcut gully، surface soil specification، slope and cover plant was measured. In order to determine effective factors on gully length progress، the relationship between gully length as a dependent variable and surface soil Characteristics as independent variables by means of step by step regression method in SPSS software were analyzed. The result of this study showed that four factors including; slope، EC، pH، cover plant have significant correlation in one percent level with gully length progress. The slope gradient of above gully headcut was the most important factor. The factors such as; slope، EC and pH had positive relationship and cover vegetation had negative relationship with length expansion gullies rate. The significant influence of slope is due to production of surface flow speed in headcut. Decreasing slope and increasing cover plant around gullies can have main influence on decreasing gullies and sediment production.
Language:
Persian
Published:
Iranian Journal of Watershed Management Science and Engineering, Volume:7 Issue: 22, 2014
Page:
75
https://magiran.com/p1231873  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 1,390,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!