DOI: 10.5194/hess-19-1439-2015
Scopus记录号: 2-s2.0-84925359719
论文题名: Recharge estimation and soil moisture dynamics in a Mediterranean, semi-arid karst region
作者: Ries F ; , Lange J ; , Schmidt S ; , Puhlmann H ; , Sauter M
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 3 起始页码: 1439
结束页码: 1456
语种: 英语
Scopus关键词: Complex networks
; Groundwater
; Meteorological instruments
; Meteorology
; Moisture
; Precipitation (meteorology)
; Rain
; Recharging (underground waters)
; Soil moisture
; Soils
; Solvents
; Storms
; Meteorological station
; Metropolis algorithms
; Rainfall distribution
; Shuffled Complex Evolution
; Soil hydraulic parameters
; Soil moisture dynamics
; Soil moisture measurement
; Temporal and spatial variability
; Infiltration
; infiltration
; karst
; moisture flux
; rainstorm
; recharge
; semiarid region
; soil moisture
; unsaturated medium
; Mediterranean Region
英文摘要: Knowledge of soil moisture dynamics in the unsaturated soil zone provides valuable information on the temporal and spatial variability of groundwater recharge. This is especially true for the Mediterranean region, where a substantial fraction of long-term groundwater recharge is expected to occur during high magnitude precipitation events of above-average wet winters. To elucidate process understanding of infiltration processes during these extreme events, a monitoring network of precipitation gauges, meteorological stations, and soil moisture plots was installed in an area with a steep climatic gradient in the Jordan Valley region. In three soil moisture plots, Hydrus-1D was used to simulate water movement in the unsaturated soil zone with soil hydraulic parameters estimated by the Shuffled Complex Evolution Metropolis algorithm. To generalize our results, we modified soil depth and rainfall input to simulate the effect of the pronounced climatic gradient and soil depth variability on percolation fluxes and applied the calibrated model to a time series with 62 years of meteorological data. Soil moisture measurements showed a pronounced seasonality and suggested rapid infiltration during heavy rainstorms. Hydrus-1D successfully simulated short and long-term soil moisture patterns, with the majority of simulated deep percolation occurring during a few intensive rainfall events. Temperature drops in a nearby groundwater well were observed synchronously with simulated percolation pulses, indicating rapid groundwater recharge mechanisms. The 62-year model run yielded annual percolation fluxes of up to 66% of precipitation depths during wet years and of 0% during dry years. Furthermore, a dependence of recharge on the temporal rainfall distribution could be shown. Strong correlations between depth of recharge and soil depth were also observed. © 2015 Author(s). CC Attribution 3.0 License. © 2015 Author(s). CC Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78570
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Hydrology, University of Freiburg, Freiburg, Germany; Geoscience Center, Applied Geology, University of Göttingen, Göttingen, Germany; Forest Research Institute Baden-Württemberg, Freiburg, Germany
Recommended Citation:
Ries F,, Lange J,, Schmidt S,et al. Recharge estimation and soil moisture dynamics in a Mediterranean, semi-arid karst region[J]. Hydrology and Earth System Sciences,2015-01-01,19(3)