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- W2077206586 abstract "Steep slopes consisting of disturbed soil are very often found in construction, landfill, and surface miningsituations. Although legislation and economics dictate that vegetative cover be established on these slopes as rapidly aspossible, the occurrence of large rainfall events during critical periods of vegetation establishment can frequently causeextensive soil loss. Sediment generated from erosion can impair offsite water quality, and onsite damages to the erodedregion can be so extensive that expensive earthmoving, regrading, reseeding, and remulching may be necessary. We evaluatedthe effectiveness of two soil treatments for reducing runoff and soil loss from a silt loam topsoil placed on a constructed 32%slope. The three treatments were an untreated control, 80 kg ha1 anionic polyacrylamide (PAM) applied as a liquid spray,and 80 kg ha1 PAM as a liquid spray combined with a dry granular application of 5 Mg ha1 of gypsum. Replicated plotswere subjected to a range of rainfall intensities under a programmable rainfall simulator, and resulting runoff and sedimentloss were measured. In the first event of 69 mm h1 uniform rainfall applied for one hour to initially dry soil, the PAM andPAM with gypsum treatments significantly reduced runoff by almost 90% and sediment yield by 99%, compared to the control.Total runoff through a series of simulated rainfall events was reduced by 40% to 52%, and sediment loss was reduced by 83%to 91% for the plots treated with PAM and PAM plus gypsum, respectively. These results indicate that the use of PAM aloneor in combination with gypsum can significantly reduce runoff and soil loss from large storm events, and may be acosteffective approach to protect the soil during critical periods of vegetation establishment, particularly for disturbed soilson steep slopes." @default.
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- W2077206586 date "2002-01-01" @default.
- W2077206586 modified "2023-09-23" @default.
- W2077206586 title "POLYACRYLAMIDE SOIL AMENDMENT EFFECTS ON RUNOFF AND SEDIMENT YIELD ON STEEP SLOPES: PART I. SIMULATED RAINFALL CONDITIONS" @default.
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- W2077206586 doi "https://doi.org/10.13031/2013.11070" @default.
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