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首页> 外文期刊>International Journal of Erosion Control Engineering >Intensive Measurements of Soil Pore Water Pressure for Analyzing Heterogeneous Hydrological Processes on a Hillslope
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Intensive Measurements of Soil Pore Water Pressure for Analyzing Heterogeneous Hydrological Processes on a Hillslope

机译：土壤孔隙水压力的密集测量，用于分析山坡上的非均质水文过程

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We conducted intensive tensiometer measurements of soil pore water pressure to examine the spatial heterogeneity of hydrological properties at a mountainous hillslope at the Hodaka Sediment Observatory of Kyoto University, Gifu, central Japan. The detailed measurements revealed that pressure head at the soil-bedrock interface was highly variable in terms of waveform, value, and timing throughout the slope. On the basis of its variation, pressure head was classified into four general groups (types 1-4). Type 1 showed rapid peaks with near-zero pressure values coinciding with rainfall peaks and type 2 showed almost no responses to hyetographs. Compared to types 1 and 2, types 3 and 4 showed unique characteristics. That is, type 3 showed delayed peaks in comparison with hyetographs and gradual recession limbs, indicating the existence of groundwater seepage from the bedrock fracture. Moreover, it also represented the characteristic base flow discharge from whole basin area. Type 4 showed sharp pressure spikes coinciding with rainfall peaks, suggesting vertical infiltration within macropores and irregular preferential flows above the bedrock. In this study, we successfully detected various patterns of soil water behavior within the relatively narrow area that characterized the hydrological processes of the hillslope and the watershed.
机译：我们对土壤孔隙水压力进行了密集的张力测量，以研究位于日本中部岐阜市京都大学穗高沉积物观测站山坡上水文特性的空间异质性。详细的测量结果表明，在整个斜坡上，土-基岩界面处的压头在波形，数值和时间方面都高度可变。根据其变化，压头分为四个一般组（类型1-4）。类型1显示快速峰，压力值接近零，与降雨峰相吻合，类型2显示对吸油描记器几乎没有响应。与类型1和2相比，类型3和4显示出独特的特性。也就是说，与等温线描记器和渐进式衰退肢体相比，类型3显示出延迟的峰值，表明存在从基岩裂缝渗漏的地下水。此外，它还代表了整个流域面积的特征性基流流量。类型4显示出尖锐的压力峰值与降雨峰值相吻合，表明大孔内垂直渗透和基岩上方的不规则优先流动。在这项研究中，我们成功地检测到了在相对狭窄的区域内表征山坡和流域水文过程的土壤水分行为的各种模式。

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