不同技术措施对河岸带治理效果的研究

Study on the Effect of Different Technical Measures on Riparian Zone Governance

为更好地保护牤牛河两岸林地资源,开展了“生物技术+简易工程技术”相结合的生态治理技术体系研究,结果表明:2.0 m和3.0 m宽的梯形缓坡简易坝体对河岸有效防护率较对照分别提高119.5%和136.6%,林木成活率和有效防护率均在90%以上;2.0 m和3.0 m宽的坝体树木成活率、有效防护率、平均淤积深度、冲淤量均极显著高于对照和1.0 m坝体宽度。“生物技术+简易工程技术”比其他两项技术平均淤积深度分别提高了0.29 m和0.96 m,治理效果显著,其平均淤积深度和冲淤量极显著高于其他两项措施。通过应用“生物技术+简易工程技术”对河岸带进行治理,4年间累计冲淤深度1.51 m,冲淤量20.14万m^(3)。

In order to better protect the forest and land resources on both sides of the Mangniu River,the research of ecological management technology system was carried out by combining“biotechnology+simple engineering technology”.The results show that compared with the control,the effective protection rates of the simple dams with trapezoidal gentle slopes at 2.0 m and 3.0 m width were increased by 119.5%and 136.6%,respectively,and the survival rate and effective protection rate were both above 90%;survival rate,effective protection rate,average deposition depth,and scour and deposition volume of dams with 2.0 m and 3.0 m width were significantly higher than those of control and dams with 1.0 m widths.Compared with the other two technologies,the average sedimentation depth of“biotechnology+simple engineering technology”was increased by 0.29 m and 0.96 m,respectively.Treatment effect was remarkable.The average sedimentation depth and erosion-sediment volume were significantly higher than those of the other two measures.The accumulated erosion and deposition depth was 1.51 m,and erosion-sedimentvolume was 201400 m^(3)in 4 years by“biotechnology+simple engineering technology”application in riparian zone.