施加PAM和PG对坡地产流产沙的影响研究

Influence of Using PAM and PG to Runoff and Sediment Yields of Sloping Land

在人工降雨条件下,研究吕梁地区混合施加不同量的聚丙烯酰胺(PAM)和磷石膏(PG)对坡地产流和产沙的影响,结果表明:单独施加PAM可以明显减少产流量和产沙量,施加1、2 g/m^2PAM处理分别比CK总产流量减少58.6%和21.2%,总产沙量减少41.7%和54.1%;单独施加PG对产流量影响不明显,而且产沙量会增加,施加100、200 g/m^2PG处理比CK总产沙量增加7.8%和10.3%;PAM与PG混施可提高土壤的稳定入渗率,具有比单独施加等量PAM更佳的减流效果,但产沙量会有所增加;1 g/m^2PAM和200 g/m^2PG混施具有最优的减流、减沙综合效果,相比CK总产流量减少71.2%、总产沙量减少33.2%。实践中建议采用1 g/m^2PAM和200 g/m^2PG混施以达到最佳的蓄水减沙效果。

The paper studied the influence of adding different mixed amount of PAM and PG to the runoff and sediment yields of sloping land in Lyuliang region under the conditions of artificial rainfall.The outcomes show that a)the runoff and sediment yields can be significantly reduced by separately adding PAM.The total runoff yield is 58.6%and 21.2%less and the total sediment yield is 41.7%and 54.1%less than that of CK with 1 g/m^2 and 2 g/m^2 PAM;b)PG has no obvious effect on runoff yield but the sediment yield will be increased.The total sediment yield will be 7.8%and 10.3%respectively more than that of CK with adding 100 g/m^2 and 200 g/m^2 PG;c)Adding the mixture of PAM and PG can increase the stable soil infiltration and has better effect of runoff reduction than only adding PAM,while the sediment yield will be increased and;d)The mixture of 1 g/m^2 PAM and 200 g/m^2 PG have the best comprehensive effect of runoff and sediment reduction.The total runoff yield is 71.2%less and the total sediment yield is 33.2%less than that of CK.Therefore,it suggests adopting the mixture of 1g/m^2 PAM and 200 g/m^2 PG for achieving the best comprehensive effect of water conservation and sediment reduction.