caa a22 4500 445815124 CHVBK 20180317145225.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10040-011-0716-3 doi (NATIONALLICENCE)springer-10.1007/s10040-011-0716-3 Impacts of soil conservation on groundwater recharge in the semi-arid Loess Plateau, China [Elektronische Daten] [John Gates, Bridget Scanlon, Xingmin Mu, Lu Zhang] Impacts de la préservation des sols sur la recharge de la nappe du plateau lœssique semi-aride, Chine Soil conservation measures undertaken to address land degradation can alter the hydrologic cycle by changing partitioning of water fluxes at the land surface. While effects on runoff are well documented, impacts of soil conservation activities on fluxes to groundwater are poorly understood. The goal of this study was to examine fluxes to groundwater in a semi-arid area of China's Loess Plateau that has been subject to extensive soil conservation activities. Unsaturated zone pore-water pressures and concentrations of chloride show that impacts on deep drainage differ between ecological and structural soil conservation approaches. High matric potentials and low chloride beneath cultivated terrace and gulley sites are consistent with deep drainage occurring at these sites. Estimated recharge rates for dryland cultivated upland sites were approximately 55-90mm/year (11-18% of mean annual rainfall) based upon chloride mass balance. In contrast, results suggest that mature tree and shrub plantations prevent deep drainage. Stable isotope signatures of unsaturated-zone moisture and groundwater indicate that focused infiltration through gullies and other topographic lows is likely to be the primary recharge mechanism. The results of this study highlight the potential for inadvertent effects of some soil conservation approaches on regional water resources. Springer-Verlag, 2011 Groundwater recharge nationallicence Unsaturated zone nationallicence Loess plateau nationallicence China nationallicence Agriculture nationallicence Gates John Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, University Station Box X, 78713, Austin, TX, USA aut Scanlon Bridget Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, University Station Box X, 78713, Austin, TX, USA aut Mu Xingmin Institute of Soil and Water Conservation, Northwest A&F University and Chinese Academy of Sciences, 26 Xinong Ra, 712100, Yangling, Shaanxi, China aut Zhang Lu CSIRO Land and Water, GPO Box 1666, ACT 2601, Canberra, Australia aut Hydrogeology Journal Springer-Verlag 19/4(2011-06-01), 865-875 1431-2174 19:4<865 2011 19 10040 https://doi.org/10.1007/s10040-011-0716-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10040-011-0716-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gates John Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, University Station Box X, 78713, Austin, TX, USA aut NATIONALLICENCE 700 1- Scanlon Bridget Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, University Station Box X, 78713, Austin, TX, USA aut NATIONALLICENCE 700 1- Mu Xingmin Institute of Soil and Water Conservation, Northwest A&F University and Chinese Academy of Sciences, 26 Xinong Ra, 712100, Yangling, Shaanxi, China aut NATIONALLICENCE 700 1- Zhang Lu CSIRO Land and Water, GPO Box 1666, ACT 2601, Canberra, Australia aut NATIONALLICENCE 773 0- Hydrogeology Journal Springer-Verlag 19/4(2011-06-01), 865-875 1431-2174 19:4<865 2011 19 10040 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer