[Home ] [Archive]   [ فارسی ]  
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
:: Volume 11, Issue 39 (1-2018) ::
jwmseir 2018, 11(39): 105-108 Back to browse issues page
The effect of plan and slope profile on runoff initiation threshold
Abstract:   (180 Views)

The alertness of runoff appearance of the watershed is useful knowledge in knowing about sediment movement in surface flow, flow amount, and soil surface damage caused by precipitation. The plan shape is an important parameter which affects the run-off initiation which has been investigated in this research. In order to investigate the effect of the plan shape, a three dimensional geometric model is required. Calculating the run-off appearance in hillslopes leads to measuring the time that the run-off starts, as well as surface water flow and the amount of runoff and sediment movement. A laboratory research is conducted to investigate the effects of plan shape which are divergent, parallel, and convergent on time of run-off initiation. The results showed that the nine complex hillslopes have a different runoff initiation threshold. As well, when the plan shape changes from convergent to divergent, the time of runoff initiation of surface and subsurface flow increases. This means that in the convergent hillslopes, runoff starts later. Also, the effect of plan shape is more important than profile curvature for starting runoff. Thus, in the divergent and concave hillslopes, runoff is started posterior than convergent and convex hillslopes.  
 

Keywords: runoff initiation threshold, plan shape, slope profile
Full-Text [PDF 753 kb]   (45 Downloads)    
Type of Study: Research | Subject: Special
Received: 2016/01/31 | Accepted: 2017/05/31 | Published: 2018/01/7
Add your comments about this article
Your username or Email:

Write the security code in the box >


XML   Persian Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

The effect of plan and slope profile on runoff initiation threshold. jwmseir. 2018; 11 (39) :105-108
URL: http://jwmsei.ir/article-1-591-en.html


Volume 11, Issue 39 (1-2018) Back to browse issues page
مجله علوم ومهندسی آبخیزداری ایران Iranian Journal of Watershed Management Science and Engineering
Persian site map - English site map - Created in 0.049 seconds with 808 queries by yektaweb 3604