کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9491292 | 1630179 | 2005 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Estimating spatial distributions of hydraulic parameters for a two-scale structured heterogeneous lignitic mine soil
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Estimating spatial distributions of hydraulic parameters for a two-scale structured heterogeneous lignitic mine soil Estimating spatial distributions of hydraulic parameters for a two-scale structured heterogeneous lignitic mine soil](/preview/png/9491292.png)
چکیده انگلیسی
The hydraulic properties are calculated from the measured bulk densities and texture data, using the Kozeny-Carman-equation for the saturated hydraulic conductivity, Ks, and the Arya-Paris approach for the water retention characteristics, Ï(θ). The effective porosity for Ks is reduced and the water retention increased in proportion to the lignite contents. Small-scale variability of hydraulic parameters is evaluated by using photographs of lignitic fragment distributions. For the discernable inclined layer structures, with a width of approximately 40 cm and a dip of 35°, Ks values in the range between 2.5 and 250 cm/d are estimated. The variability of the water retention characteristics is less pronounced. The predicted Ï(θ) functions are more comparable with loamy than sandy soils. The small-scale intra-layer variability of hydraulic parameters is higher than for lignite-poor mine spoil sediments and for most natural soils. The results may help to improve the analyses of flow and transport in lignitic mine soils by providing 2D two-scale parameter distributions for numerical simulations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 312, Issues 1â4, 10 October 2005, Pages 109-124
Journal: Journal of Hydrology - Volume 312, Issues 1â4, 10 October 2005, Pages 109-124
نویسندگان
Uwe Buczko, Horst H. Gerke,