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首页> 外文会议>International Conference on Water and Environment(WE-2003); 20031215-18; Bhopal(IN) >Spatial Variability Of Vertical Permeability Of The Soil Cover Determined Using Double Ring Infiltrometer In Maheshwaram Watershed, A Granitic Semi Arid Region
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Spatial Variability Of Vertical Permeability Of The Soil Cover Determined Using Double Ring Infiltrometer In Maheshwaram Watershed, A Granitic Semi Arid Region

机译：花岗岩半干旱地区Maheshwaram流域用双环渗透计测定土壤覆盖物垂直渗透率的空间变异性

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The infiltration test was carried out specially to know the rate of percolation or rate of vertical flow from the surface to few ten's of centimeter below the ground. As the hard rock region is extremely heterogeneous system so as to understand the unsaturated zone specially the top layer, infiltration test was very useful to have idea of vertical flow of fluid. In the present study infiltration test using double ring infiltrometers was carried out at 38 sites in a small watershed of about 60 km~2 in a crystalline hard rock terrain. Out of 38 sites; 16 tritium injection sites comprising different type of soils, 17 tank beds, 4 bottom of the dug wells and 1 near the hydro-meteorological station. The result shows significant variation of infiltration rate in different soil types, tank beds and dug wells. The infiltration rates vary from 848.8 to 1.7mm/hr, such a wide variation in rate again confirms the heterogeneity although it also depends on the initial soil moisture content. The field saturated hydraulic conductivity (K_(fs)) varies from 1.52683 * 10~(-7) m/s to 3.1255 * 10~(-5) m/s corresponding to minimum and maximum infiltration rate. This infiltration results could be used for the correlation of the recharge measured with tritium injection and also these results has provided spatial variability of rainfall recharge an important input to the groundwater flow model.
机译：专门进行渗透测试是为了了解从表面到地下几十厘米的渗透速率或垂直流动速率。由于硬岩区域是非常不均匀的系统，以便特别了解顶层的非饱和带，因此渗透测试对于了解流体的垂直流动非常有用。在本研究中，使用双环渗透仪在结晶硬岩地形中约60 km〜2的小流域的38个地点进行了渗透测试。在38个站点中； 16个injection注入点，包括不同类型的土壤，17个槽床，4个挖井底部和1个在水文气象站附近。结果表明，不同土壤类型，储罐床和挖井的入渗率差异很大。入渗速率从848.8到1.7mm / hr不等，这种速率的较大变化再次证实了异质性，尽管这也取决于初始的土壤水分含量。场饱和导水率（K_（fs））从1.52683 * 10〜（-7）m / s到3.1255 * 10〜（-5）m / s，对应于最小和最大渗透率。该入渗结果可用于injection注入测得的补给量的相关性，这些结果也为降雨补给量的空间变化提供了地下水流模型的重要输入。

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