DOI: 10.5194/hess-19-1107-2015
Scopus记录号: 2-s2.0-84923881926
论文题名: A groundwater recharge perspective on locating tree plantations within low-rainfall catchments to limit water resource losses
作者: Dean J ; F ; , Webb J ; A ; , Jacobsen G ; E ; , Chisari R ; , Dresel P ; E
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 2 起始页码: 1107
结束页码: 1123
语种: 英语
Scopus关键词: Catchments
; Chlorine compounds
; Evapotranspiration
; Forestry
; Groundwater
; Groundwater resources
; Rain
; Reforestation
; Rivers
; Runoff
; Timber
; Water levels
; Water resources
; Water supply
; Chloride mass balance
; Economic viability
; Forestry management
; Ground water recharge
; Plantation forestry
; Spatial heterogeneity
; Spatial variations
; Water table fluctuations
; Recharging (underground waters)
; groundwater-surface water interaction
; plantation
; rainfall-runoff modeling
; recharge
; reforestation
; stream bed
; water resource
; Plantations
; Trees
; Water Resources
英文摘要: Despite the many studies that consider the impacts of plantation forestry on groundwater recharge, and others that explore the spatial heterogeneity of recharge in low-rainfall regions, there is little marriage of the two subjects in forestry management guidelines and legislation. Here we carry out an in-depth analysis of the impact of reforestation on groundwater recharge in a low-rainfall (< 700 mm annually), high-evapotranspiration paired catchment characterized by ephemeral streams. Water table fluctuation (WTF) estimates of modern recharge indicate that little groundwater recharge occurs along the topographic highs of the catchments (average 18 mm yr-1); instead the steeper slopes in these areas direct runoff downslope to the lowland areas, where most recharge occurs (average 78 mm yr-1). Recharge estimates using the chloride mass balance (CMB) method were corrected by replacing the rainfall input Cl- value with that for streamflow, because most recharge occurs from infiltration of runoff through the streambed and adjacent low gradient slopes. The calculated CMB recharge values (average 10 mm yr-1) are lower than the WTF recharge values (average 47 mm yr-1), because they are representative of groundwater that was mostly recharged prior to European land clearance (> BP 200 years). The tree plantation has caused a progressive drawdown in groundwater levels due to tree water use; the decline is less in the upland areas. The results of this study show that spatial variations in recharge are important considerations for locating tree plantations. To conserve water resources for downstream users in low-rainfall, high-evapotranspiration regions, tree planting should be avoided in the dominant zone of recharge, i.e. the topographically low areas and along the drainage lines, and should be concentrated on the upper slopes, although this may negatively impact the economic viability of the plantation. © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78590
Appears in Collections: 气候变化事实与影响
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作者单位: Agricultural Sciences Department, La Trobe University, Bundoora, VIC, Australia; National Centre for Groundwater Research and Training, Adelaide, Australia; Institute for Environmental Research, ANSTO, Sydney, Australia; Department of Environment and Primary Industries, Bendigo, VIC, Australia; Biological and Environmental Sciences, University of Stirling, United Kingdom
Recommended Citation:
Dean J,F,, Webb J,et al. A groundwater recharge perspective on locating tree plantations within low-rainfall catchments to limit water resource losses[J]. Hydrology and Earth System Sciences,2015-01-01,19(2)