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[1]LIU Hongtao,LI Qilong,HAN Yu,et al.Effect of PAM on the Characteristics of Runoff and Sediment Yield in Protection Slope of Embankment of Silty Loam in Cold Area[J].Research of Soil and Water Conservation,2020,27(06):14-20.

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Effect of PAM on the Characteristics of Runoff and Sediment Yield in Protection Slope of Embankment of Silty Loam in Cold Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 27 Number of periods: 2020 06 Page number: 14-20 Column: 目次 Public date: 2020-10-20

Title:: Effect of PAM on the Characteristics of Runoff and Sediment Yield in Protection Slope of Embankment of Silty Loam in Cold Area

Author(s):: LIU Hongtao^1,2,3, LI Qilong^1,2, HAN Yu⁴, CAI Die^1,2, LI Qiqi⁴, LONG Yufan^1,2; (1.School of Water Conservancy & Environment Engineering, Changchun Institute of Technology, Changchun 130012, China; 2.Laboratory of Applied Disaster Prevention in Water Conservation Engineering of Jilin Province, Changchun 130012, China; 3.Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot 010018, China; 4.College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China)

Keywords:: slope erosion; polyacrylamide; slope; runoff and sediment yield

CLC:: S157.1

DOI:: -

Abstract:: In order to solve the problem of soil and water loss on the backwater slope of the silty loam dyke in the cold region, based on the outdoor simulated rainfall experiment, the influence of PAM on the slope erosion characteristics of the second silty loam dyke in the Songhuajiang River basin under different slope gradients and underlying surface conditions were studied. The treatments included 4 slope gradients(10°, 15°, 20°, 25°)and 5 PAM concentrations(0,2,3,4,5 g/m²). The results showed that the slope gradients increased from 10° to 25°, the average runoff of the slope first increased and then decreased, and the sediment yield increased with the increase of the slope under the same rainfall intensity and underlying surface conditions; the concentration of polyacrylamide increased from 2 g/m² to 5 g/m², and the average flow yield decreased by 10.6%～20% compared with bare land under the condition of the same rainfall intensity and slope; the average sediment yield decreased with the increase of concentration; there were the positive correlation between sediment yield and slope and the negative correlation between sediment yield and concentration based on fitting average sediment yield of slope and concentration; the erosion pattern of open slope was mainly characterized by splash erosion and surface erosion; the application of PAM reduced the area of serious slope erosion by 54.57% compared with that of open slope, which had a certain effect of erosion control. It is concluded from this experiment that the application of polyacrylamide on the slope can enhance the soil water infiltration capacity and reduce the erosion and sediment production.

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Last Update: 2020-10-20