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Paper Information

Journal:   IRANIAN JOURNAL OF SOIL AND WATER RESEARCH   FALL 2015 , Volume 46 , Number 3; Page(s) 443 To 453.
 
Paper: 

VARIATIONS OF RUNOFF GENERATION DURING RAINFALL EVENT WHEN DIFFERENT LEVELS OF POLYACRYLAMIDE IN ITS POWDER VS LIQUID FORM APPLIED

 
 
Author(s):  KARIMI ZEINAB, SADEGHI SEYED HAMIDREZA*, BAHRAMI HISSEIN ALI
 
* DEPARTMENT OF WATERSHED MANAGEMENT ENGINEERING, FACULTY OF NATURAL RESOURCES, TARBIAT MODARRES UNIVERSITY CORRESPONDING AUTHOR
 
Abstract: 

A study of the temporal variations in runoff generation is one of the important in water and soil conservation when either under natural conditions or accompanied by application of soil amendments. However, runoff generation variations along with application different types of soil amendments has less been considered. Therefore, the current study was planned to investigate such states of runoff generations' temporal variations as observed on a clay-loamy soil. To follow the purpose, the effects of different levels of Polyacrylamide (0.4, 2, and 6 g m-2) on runoff generation in the presence of flour vs liquid types were carried out on 0.25 m2-small plots and as well in lab conditions. Rainfall simulation was performed with two intensities of 50 and 80 mm h-1 for 17 and 8 minutes, respectively, compatible with the dominant conditions of the area, and after 48 hours past from Polyacrylamide application. Results obtained from general linear model verified non-significant effect (P<0.2) of 0.4 g m-2 treatment (use of flour vs liquid form Polyacrylamide) and the significant effect (p=0.00) of rainfall intensity on runoff generation. In addition, significant effect of Polyacrylamide type at 2 and 6 g m-2 levels (P<0.04) and also rainfall intensity (p=0.00) on runoff generation was verified. Also, the cross effect of amendment type and rainfall intensity on runoff intensity in the case of 0.4 g m-2 treatment was evaluated as insignificant (p>0.2), whereas it was found significant for the 2 and 6 g m-2 treatments (p<0.04).

 
Keyword(s): RAINFALL SIMULATION, RUNOFF CONTROL, SOIL AMENDMENTS, SOIL CONSERVATION
 
References: 
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