DOI: 10.5194/hess-20-1-2016
Scopus记录号: 2-s2.0-84956976674
论文题名: Soil-aquifer phenomena affecting groundwater under vertisols: A review
作者: Kurtzman D ; , Baram S ; , Dahan O
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期: 1 起始页码: 1
结束页码: 12
语种: 英语
Scopus关键词: Aquifers
; Arid regions
; Contamination
; Cracks
; Groundwater
; Groundwater flow
; Groundwater resources
; Hydrogeology
; Land use
; Nitrates
; Recharging (underground waters)
; Saline water
; Soils
; Anion exchange capacity
; Flow and transport
; Groundwater contamination
; Nitrate contamination
; Preferential flows
; Preferential pathways
; Retarding effect
; Sediment samples
; Groundwater pollution
; agricultural land
; airflow
; alluvial deposit
; aquifer
; clay soil
; denitrification
; evaporation
; flushing
; groundwater flow
; groundwater pollution
; land use change
; lysimeter
; nitrate
; pollutant transport
; recharge
; saline intrusion
; salinity
; salinization
; semiarid region
; soil
; soil cracking
; vadose zone
; Vertisol
; void
英文摘要: Vertisols are cracking clayey soils that (i) usually form in alluvial lowlands where, normally, groundwater pools into aquifers; (ii) have different types of voids (due to cracking), which make flow and transport of water, solutes and gas complex; and (iii) are regarded as fertile soils in many areas. The combination of these characteristics results in the unique soil-aquifer phenomena that are highlighted and summarized in this review. The review is divided into the following four sections: (1) soil cracks as preferential pathways for water and contaminants: in this section lysimeter-to basin-scale observations that show the significance of cracks as preferential-flow paths in vertisols, which bypass matrix blocks in the unsaturated zone, are summarized. Relatively fresh-water recharge and groundwater contamination from these fluxes and their modeling are reviewed; (2) soil cracks as deep evaporators and unsaturated-zone salinity: deep sediment samples under uncultivated vertisols in semiarid regions reveal a dry (immobile), saline matrix, partly due to enhanced evaporation through soil cracks. Observations of this phenomenon are compiled in this section and the mechanism of evapoconcentration due to air flow in the cracks is discussed; (3) impact of cultivation on flushing of the unsaturated zone and aquifer salinization: the third section examines studies reporting that land-use change of vertisols from native land to cropland promotes greater fluxes through the saline unsaturated-zone matrix, eventually flushing salts to the aquifer. Different degrees of salt flushing are assessed as well as aquifer salinization on different scales, and a comparison is made with aquifers under other soils; (4) relatively little nitrate contamination in aquifers under vertisols: in this section we turn the light on observations showing that aquifers under cultivated vertisols are somewhat resistant to groundwater contamination by nitrate (the major agriculturally related groundwater problem). Denitrification is probably the main mechanism supporting this resistance, whereas a certain degree of anion-exchange capacity may have a retarding effect as well. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78952
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Soil, Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet Dagan, Israel; Dept. of Land, Air and Water Resources, University of California, Davis, CA, United States; Dept. of Hydrology and Microbiology, Zuckerberg Institute for Water Research, Ben Gurion University of the Negev, Sde Boker Campus, Negev, Israel
Recommended Citation:
Kurtzman D,, Baram S,, Dahan O. Soil-aquifer phenomena affecting groundwater under vertisols: A review[J]. Hydrology and Earth System Sciences,2016-01-01,20(1)