| Cite this article: | 王佳坤.砒砂岩土壤水分入渗规律及适用模型研究[J].灌溉排水学报,,():-. |
| wangjiakun.砒砂岩土壤水分入渗规律及适用模型研究[J].灌溉排水学报,,():-. |
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| Study on horizontal infiltration law and model test of pish sandstone soil |
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wangjiakun
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内蒙古农业大学
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| Abstract: |
| 【Objective】Taking the typical arsenic sandstone soil in Zhungeer banner of Inner Mongolia as the research object, the influence of the change of bulk density on the infiltration characteristics of arsenic sandstone soil and the applicable model were studied.【Method】 In this paper, RS (purplish red), HS (pink) and WS (gray white) of three groups of soft rock soil were tested by simulated soil column method. The influence of 5 gradients (volume weight 1.30, 1.35, 1.40, 1.45 and 1.50g/cm3) on water infiltration was studied. 【Result】In the vertical infiltration of pisha sandstone soil, the infiltration rate and the migration rate of wetting front decrease with the time in a power function; the volume weight affects the infiltration capacity of soft rock soil, the larger the volume weight is, the lower the infiltration rate and cumulative infiltration amount are, and the slower the migration of wetting front is.【Conclusion】Philip model and Kostiakov model are suitable for simulating the vertical infiltration process under the influence of different volume weight, in which Kostiakov model is fitted The improved Philip model, which can directly reflect the relationship between bulk density and infiltration rate, is established, and the improved model is verified to have higher simulation accuracy by r-test. |
| Key words: infiltration； pisha sandstone soil； bulk density |
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