[PDF] Top 20 Polyacrylamide decreases furrow erosion

... The decreasing concentration implies that, after a rapid initial increase in sediment transport, there is a net deposition (ie: deposition rate exceeds the erosion rate) and that sedimen[r] ... See full document

... The concentration of PAM in runoff declined over time for both application methods (Fig. 3.9). PAM concentrations from the GPAM treatment were 13 to 17 mg L -1 in the first runoff samples of the first and second rain ... See full document

... The decreases in runoff were large between several treatments. For instance, on January 14 th the 705 mulched treatment compared to the seed/mulch control decreased runoff 100% (Figure 55), but there was not a ... See full document

... (Except when head-cuts formed, furrow cross-sectional shape did not change substantially after the initial several minutes of flow.) Instead, the net sediment deposition was likely the r[r] ... See full document

... splash erosion at rain intensities of 65, 95 and 120 mm/h among all the ...of polyacrylamide do not enter in the soil clog and remain on the soil surface and it can prevent soil surface cracks and stabilize ... See full document

... a furrow irrigation erosion model or prediction equations continues ...rills, furrow inflow water typically contains little sediment and proceeds to detach and transport ...flow decreases with ... See full document

... uncontrolled furrow erosion is often excessive (Brown and Kemper, ...substantial decreases in loss rates suggest that one or two whey applications in the first half of the irrigation sea- son may ... See full document

... for erosion and infi ltra- tion management in irrigation furrows, other researchers discovered that the approach also decreased runoff losses of nutrients, sediment-associated pesticides, and microorgan- isms ... See full document

... slows furrow advance (Lentz and Sojka, 1994), initial irrigation infl ows for WSPAM furrows were set to 45 L min −1 ...prevented erosion that would ordinarily occur at these high infl ow ... See full document

... In furrow irrigation, where downslope infiltration results in increasingly smaller downstream flows, (the opposite of rain induced rill erosion where streams increase as runoff accumulat[r] ... See full document

... Laboratory-scale furrow results compared with field test results highlighting the effect of molecular weight on the effectiveness of polyacrylamide, PAM, in controlling erosion-induced s[r] ... See full document

... Seely (eds.) Proc. Worksnop on Computer Ap p lications in Water Management. Colorado State University Water Resources Research institute Info. 1996 Polyacryiamide application to control [r] ... See full document

... Recent field studies have demonstrated that small concentra- tions of polymers dissolved in irrigation water appreciably reduce soil loss from irrigated furrows and increase net infil- t[r] ... See full document

... It has been shown to effectively halt furrow irrigation erosion on a variety of western soils (Sojka and Lentz, 1996c), about half a ton of soil per ounce of PAM used in Idaho tests.. It[r] ... See full document

... Furrow irrigation erosion reduces topsoil depth on upslope portions of furrow irrigated fields and seriously reduces soil productivity.. Crop yield decreases resulting from furrow irriga[r] ... See full document

... Field responses to specific PAM treatments also varied among irrigations, especially at application rates less than 0.7 kg he. A number of factors potentially influence PAM efficacy in a[r] ... See full document

... L Seasonal sediment losses per treatment per irrigation in furrow outflows in 1993 and 1994, as affected by PAM addition (P) or untreated water (C), normal (N) or high (H) flow rate, and[r] ... See full document

... Not Enough PAM Was Applied - Rate of PAM addition mist be based on total irrigation inflow rate, erosion potential for a field, and desired injection concentration.. Losses of PAM Durin[r] ... See full document

... Cationic or anionic PAM treatments having high charge densities appeared to be more effective for reducing sediment loss from furrows than low-charge density polymers.. Sediment loss dat[r] ... See full document

... Applying polyacrylamide (PAM) with furrow irrigation water dramatically reduces soil erosion and frequently increases infiltration. We conducted three studies to determine if PAM control[r] ... See full document