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当前位置: 首页 > 文章 > 弃土场原位与弃土斜坡水分运动特征对比分析山东农业大学学报(自然科学版) 2024,55 (2) 279-287

Position: Home > Articles > Comparison of Water Movement Characteristics Between Spoil Ground and Spoil Slope Journal of Shandong Agricultural University(Natural Science Edition) 2024,55 (2) 279-287

弃土场原位与弃土斜坡水分运动特征对比分析

作者：

代国发;王永奇;何玉琼;张家明;董文杰

单位：

关键词：

弃土场;水分运动特征;染色示踪试验;染色面积比;湿润锋

摘要：

降雨入渗会改变斜坡原有的平衡状态,为探究弃土场原位与弃土斜坡降雨入渗过程的水分运动特征.以某弃土场为研究对象重复开展染色示踪试验,对比分析原位与弃土斜坡垂直方向上土壤剖面的染色面积比和渗流前后水分运动特征的差异.结果表明(1)原位斜坡水分入渗以基质流为主,少量优先流动由生物通道引发;0~50 cm深度水分垂直均匀入渗程度高,随深度增大,表现出沿容重小一侧非均匀流动;50 cm深度以下,平均染色面积比与深度呈负相关;(2)无植被发育弃土斜坡无优先流动,沿斜坡土体表层水平扩散流动程度高,平均染色面积比在20 cm深度以下保持为0,无染色特征;植被发育弃土斜坡水分沿植物根茎优先入渗,垂直入渗较活跃;(3)染色面积比及湿润带特征能很好的捕捉斜坡水分渗流的非均匀信息;同时,根系会改变土体的孔隙发育程度,形成内部交织的网状结构,降低土壤容重,增加水分入渗,有利于增强表层土壤含水率,降低水分深层渗流,增强斜坡稳定性;加强弃土场植被生态恢复有利于增加斜坡的固土保水能力及稳定性.

译名：

Comparison of Water Movement Characteristics Between Spoil Ground and Spoil Slope

关键词：

Disposal site%water movement characteristics%staining tracer test%staining area ratio%wet front

摘要：

Rainfall infiltration can change the slopes original equilibrium state,in order to explore the water movement characteristics in the process of rainfall infiltration in situ and on the spoil slope,we repeated the staining tracing test on an abandoned soil site and compared the differences in the staining area ratio of the soil profile in the vertical direction and the water movement characteristics before and after infiltration and analyzed between the in-situ and disposal slopes.The results showed:(1)In situ slope water infiltration is dominated by matrix flow,and a small amount of preferential flow is initiated by biological channels.The vertical uniform infiltration degree of water at the depth of 0~50 cm is high,and it shows non-uniform flow along the side with small volume weight as the depth increases.Below the depth of 50 cm,the average area ratio was negatively correlated with the depth.(2)There is no preferential flow on the non-vegetated disposal slopes and the horizontal diffusion flow along the surface layer of the slope soil is high,the average staining area ratio remains 0 below 20 cm depth,with no staining characteristics,the vegetated disposal slopes have preferential infiltration of water along the plant roots and stems,and the vertical infiltration is more active.(3)The stained area ratio and the wetted zone feature can well capture the non-uniform information of the water infiltration on the slopes;at the same time,the root system changes the degree of pore development of the soil,forms the internal intertwined reticulation structure,lowers the soil capacity,increases water infiltration,and contributes to the enhancement of the water infiltration.Strengthening the ecological restoration of vegetation in abandoned field is beneficial to increasing the soil fixation and water retention capacity and stability of slope.

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弃土场原位与弃土斜坡水分运动特征对比分析

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山东农业大学学报(自然科学版)

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