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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2010.5
- 수록면
- 81 - 93 (13page)
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초록· 키워드
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Anionic polyacrylamide (PAM) can reduce soil erosion. Slope is an important factor determining erosion rate; however, PAM guidelines have not been well developed for different slopes. The objective of this study was to evaluate the extent which 20-kg ha<SUP>-1</SUP> (18-lb ac<SUP>-1</SUP>) PAM (20P) and 40-kg ha<SUP>-1</SUP> (36-lb ac<SUP>-1</SUP>) PAM (40P) increase the time to initial runoff (TRO), decrease cumulative runoff (RO), and decrease cumulative sediment loss (SL) on a Mexico silt loam soil adjusted to slopes of 10%, 20%, and 40%. Soils were packed to a bulk density of 1.3 Mg m<SUP>-3</SUP> (81 lb ft-3) in test beds 0.3 m x 0.3 m x 0.15 m (12 in x 12 in x 6 in) and were subjected to a 61-mm h<SUP>-1</SUP> (2.4-in hr<SUP>-1</SUP>) simulated rainfall with a kinetic energy (KE) of 1.5 kJ m<SUP>-2</SUP> h<SUP>-1</SUP> (103 ft lb ft<SUP>-2</SUP> hr<SUP>-1</SUP>) for 1 h. Differences in TRO and SL for all slopes and PAM rates were all highly significant, as were all two-way interactions (p < 0.01). Applications of 20P and 40P significantly increased TRO compared to the untreated control (0P) at slopes 20% and greater, but not at a 10% slope. No difference in TRO was found for soils at slopes up to 20% between 20P and 40P. The TRO was significantly greater at 40% slope for the 40P compared to the 20P application. Values of TRO with 20P and 40P were not increased at a 10% slope compared to 0P. Slope was not a factor in reducing RO. Applications of 40P for all slopes had significantly greater RO than either 0P or 20P. Polyacrylamide reduced SL for all slopes. A higher rate of PAM (40P) had less SL than a lower rate of PAM (20P) at slopes of 20% and 40%. With 40P, the reduction in SL was 72% greater than 0P at 40% slope. Therefore, slope is a critical factor in determining a PAM rate for reducing soil erosion and should be considered for proper application.
목차
Abstract
Materials and Methods
Results and Discussion
Summary and Conclusions
References
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UCI(KEPA) : I410-ECN-0101-2014-521-000669457