Field scale variability of solute transport parameters and related soil properties
| Autor: | B. Lennartz, S. K. Kamra, S. Meyer-Windel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1997 |
| Předmět: | |
| Zdroj: | Hydrology and Earth System Sciences, Vol 1, Iss 4, Pp 801-811 (1997) |
| Druh dokumentu: | article |
| ISSN: | 1027-5606 1607-7938 95845879 |
| Popis: | The spatial variability of transport parameters has to be taken into account for a reliable assessment of solute behaviour in natural field soils. Two field sites were studied by collecting 24 and 36 small undisturbed soil columns at an uniform grid of 15 m spacing. Displacement experiments were conducted in these columns with bromide traced water under unsaturated steady state transport conditions. Measured breakthrough curves (BTCs) were evaluated with the simple convective-dispersive equation (CDE). The solute mobility index (MI) calculated as the ratio of measured to fitted pore water velocity and the dispersion coefficient (D) were used to classify bromide breakthrough behaviour. Experimental BTCs were classified into two groups: type I curves expressed classical solute behaviour while type II curves were characterised by the occurrence of a bromide concentration maximum before 0.35 pore volumes of effluent (MI |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|