ZHANG Zhao-fu,HUANG Yan-he,LIN Jin-shi,et al.Effects of PAM Characteristics on Runoff and Erosion of Colluvial Deposits in Benggang[J].Research of Soil and Water Conservation,2014,21(03):1-5.
PAM特性对花岗岩崩岗崩积体径流及产沙的影响
- Title:
- Effects of PAM Characteristics on Runoff and Erosion of Colluvial Deposits in Benggang
- Keywords:
- PAM; molecular weight; hydrolysis; colluvial deposits; erosion; runoff
- 分类号:
- S157.1
- 摘要:
- 研究利用人工模拟降雨，研究不同分子量（800万、1 200万和1 500万），不同水解度（10%，20%，30%）聚丙烯酰胺（PAM）对崩岗崩积体土壤侵蚀和径流的影响。结果表明：3种分子量和水解度的PAM都能够减少土壤侵蚀量，1 200万分子量PAM处理土壤侵蚀的效果最好，PAM的水解度对抗侵蚀影响差异不明显；各种PAM处理均使径流量增加，随着分子量的变大，径流量也在增加，而同一分子量的PAM，其水解度对径流量和侵蚀量的影响大致成反比关系；PAM处理下侵蚀土壤中不同粒径颗粒的含量会发生变化，砂粒的含量会有所增加，粉粒和黏粒的含量会减少。综合价格和抗侵蚀效果来看，1 200万10%水解度的PAM更适合于崩岗崩积体侵蚀治理。
- Abstract:
- Effects of PAMs with different molecular weights (MW) (8×106, 1.2×107, 1.5×107 Da) and hydrolysis degrees (10%, 20%, 30%) on soil erosion and runoff were investigated through artificial simulation rainfall experiment. The results showed that all the three PAMs decreased soil erosion separately compared with the control, the molecular weight of 1.2×107 Da was more effective than the other two, the hydrolysis degree did not show much difference in affecting soil erosion. PAMs different in molecular weights and degrees of hydrolysis, increased runoff, the higher the molecular weight was, the more the runoff increased, meanwhile, the degree of hydrolysis influenced the runoff and the erosion in an inverse relation. All the PAMs affected the content of eroded sediment particles, the percentage of sand-sized particles increased, whereas the fraction of silt-sized and clay-sized particles decreased. Considering the costs of PAMs and the effect of erosion resistance, the PAM with hydrolysis of 10% and molecular weight of 1.2×107 Da was more suitable for application to colluvial deposits of Benggang.
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备注/Memo
收稿日期:2014-01-08;改回日期:2014-02-19。
基金项目:国家自然科学基金资助项目（41001169，40671113）；国家科技支撑项目（2014BAD15B03）
作者简介:张兆福(1987-),男,福建武夷山人,硕士生,研究方向:土壤侵蚀与治理。E-mail:ffairaul@163.com
通讯作者:黄炎和(1962-),男,广东饶平人,博士,教授,研究方向:土壤侵蚀。E-mail:yanhehuang@163.com