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以南方花岗岩崩岗崩壁不同土层土壤为研究对象,运用染色示踪和Photoshop CS5图像提取技术,记录水平方向上土壤剖面的染色面积和最大染色深度,以分析崩岗崩壁不同土层的水分运动分布特征.结果表明:红土层持水性能高于砂土层和碎屑层,但水分的侧向运移速率低于其他2个土层;在水平方向上10~30 cm内各土层土壤含水量均随深度的增加呈现逐渐减小的趋势;经过24 h染色入渗试验后,砂土层水平方向上0~9 cm和碎屑层0~13 cm内的染色面积均超过80%;红土层优先流现象明显,剖面染色比例小,亮蓝染色剖面呈条带状分布,其染色面积随深度的增加而缓慢下降;砂土层和碎屑层平均染色比例较大,亮蓝染色剖面呈块状均匀分布,并随深度的增加表现出先缓慢下降后迅速下降的趋势.
In this paper, soil samples collected from collapsed granite slant in different soil layers of southern granite were taken as research objects. The stained area and the maximum depth of stain in horizontal soil profile were recorded by using color tracing and Photoshop CS5 image extraction technology. The results showed that the water holding capacity of laterite was higher than that of sand and debris, but the lateral migration rate of water was lower than that of the other two soils. In the horizontal direction of 10 ~ 30 cm Soil water content showed a decreasing trend with increasing depth; after 24 h dyeing infiltration test, the dyeing area in the horizontal direction of sand layer was 0 ~ 9 cm and the debris layer 0 ~ 13 cm was more than 80 %. The phenomenon of preferential flow is obvious in the red soil layer, and the proportion of stained sections is small. The section of bright blue stain is in a striped distribution. The dyeing area decreases slowly with increasing depth. The average proportion of sand layer and detritus layer is large, Dyeing sections were evenly distributed in the form of lumps, and showed a trend of first decreasing slowly and then decreasing rapidly with the increase of depth.