Characteristics of stable isotopes in soil water under several typical land use patterns on Loess Tableland

CHENG Li-ping; LIU Wen-zhao
March 2012
Yingyong Shengtai Xuebao;Mar2012, Vol. 23 Issue 3, p651
Academic Journal
In this study, the precipitation over the Loess Tableland in Changwu County of Shaanxi Province and the soil water in 0-20 m loess profiles under different land use patterns on the Tableland were sampled, and their isotope compositions were analyzed, aimed to understand the characteristics of stable isotopes in the soil water and the mechanisms of the soil water movement. In the study area, the equation of the local meteoric water line (LMWL) was δD=7. 39δ18O+4. 34 (R2 = 0. 94, n =71), and the contents of the stable isotopes in the precipitation had an obvious seasonal variation of high in winter and spring and low in summer and autumn. The contents of the stable isotopes in the soil water were fell on the underside of the LMWL, and higher than those in the precipitation from July to October, indicating that the soil water was mainly replenished by the precipitation with lower stable isotope contents in summer and autumn. In the soil profiles of different land use patterns, the stable isotope contents in soil water tended to be the same with the increasing soil depth; while under the same land use patterns, the water's stable isotope composition in shallow soil layers changed greatly with time, but changed less with increasing depth. Through the comparison of the stable isotope contents in precipitation and in soil water, it was observed that the piston flow and preferential flow on the Tableland were coexisted in the process of precipitation infiltration, and the occurrence of the preferential flow had a certain relation with land use pattern. Generally, the soil desiccation caused by the negative water balance resulted from the artificial plantations of high water consumption could reduce the probability of preferential flow occurrence, whereas the precipitation infiltration in the form of preferential flow could easily occur on the farmland or natural grassland so that the soil water in deep layers or the ground water could be replenished.


Related Articles

  • The Effects of Adjacent Land Use on Nitrogen Dynamics at Forest Edges in Northern Idaho. Pocewicz, Amy; Morgan, Penelope; Kavanagh, Kathleen // Ecosystems;Mar2007, Vol. 10 Issue 2, p226 

    The effects of immediately adjacent agricultural fertilization on nitrogen (N) at upland forest edges have not been previously studied. Our objective was to determine whether N from fertilized agriculture enters northern Idaho forest edges and significantly impacts their N status. We stratified...

  • Land use and forest cover on private parcels in the Upper Midwest USA, 1970 to 1990. Daniel G. Brown // Landscape Ecology;Aug2003, Vol. 18 Issue 6, p1 

    Focuses on land use and forest cover on private parcels in the Upper Midwest U.S. Interactions between land use and forest cover; Evaluation of the effects of land-use changes, especially abandonment of agriculture and dispersed development, on forest cover throughout the region; Increase in...

  • Soil hydraulic properties and their influences on soil water content under different land uses in Liudaogou watershed of Loess Plateau. LIU Chun-li; SHAO Ming-an // Yingyong Shengtai Xuebao;Nov2008, Vol. 19 Issue 11, p2400 

    By the method of cross correlation coefficient in geo-statistics, this paper studied the soil hydraulic properties and their influences on soil water distribution under four land uses, i.e., farmland, waste-grassland, forestland, and alfalfa land in Liudaogou watershed of Loess Plateau. The...

  • Is short rotation coppice economically interesting? An application to Germany. Wolbert-Haverkamp, Matthias; Musshoff, Oliver // Agroforestry Systems;Jun2014, Vol. 88 Issue 3, p413 

    Short rotation coppice (SRC) is, from a comparative static point of view, an interesting economic alternative to traditional agricultural land use. Nevertheless, farmers often do not integrate SRC into their land use. Due to the fact that the conversion to SRC can be seen as an investment, it...

  • Using an Interoperable Geoprocessing System for Hydrological Simulation. Alarcon, Vladimir J.; O'Hara, Charles G.; Viger, Roland; Shrestha, Bijay; Mali, Preeti // AIP Conference Proceedings;12/26/2007, Vol. 963 Issue 2, p1136 

    Calculation of land use and topographical parameters for hydrological models is usually performed using GIS software. Current approaches, however, are limited by the intensive user dependency on fixed routines, commands, sequences, etc., specific to the software been used. Therefore, current...

  • At landfill, developer sees golf, smells trouble. Illia, Tony // Las Vegas Business Press;07/03/2000, Vol. 17 Issue 26, p1 

    Reports on the plan of local developer Jimmy Gomes to transform the polluted Sunrise landfill into a multi-use recreational site in Las Vegas, Nevada. Claim of Gomes against Republic, formerly Silver State Disposal; Reaction of the county about the readiness of the landfill for development.

  • The high value of logged tropical forests: lessons from northern Borneo. Berry, Nicholas J.; Phillips, Oliver L.; Lewis, Simon L.; Hill, Jane K.; Edwards, David P.; Tawatao, Noel B.; Ahmad, Norhayati; Magintan, David; Khen, Chey V.; Maryati, M.; Ong, Robert C.; Hamer, Keith C. // Biodiversity & Conservation;Apr2010, Vol. 19 Issue 4, p985 

    The carbon storage and conservation value of old-growth tropical forests is clear, but the value of logged forest is less certain. Here we analyse >100,000 observations of individuals from 11 taxonomic groups and >2,500 species, covering up to 19 years of post-logging regeneration, and quantify...

  • Ecological and Land Use Studies Along Elevational Gradients. Becker, Alfred; Körner, Christian; Brun, Jean-Jacques; Guisan, Antoine; Tappeiner, Ulrike // Mountain Research & Development;Feb2007, Vol. 27 Issue 1, p58 

    Mountain regions and UNESCO Mountain Biosphere Reserves (MBRs) encapsulate broad elevational ranges, cover large gradients of geological, topographical and climatic diversity, and thus host greater biodiversity than the surrounding lowlands. Much of the biological richness in MBRs results from...

  • Sprawl Study.  // Bond Buyer;8/20/2003, Vol. 345 Issue 31702, p35 

    Cites a study by Michigan Land Use Leadership Council to study the causes, effects and trends of urban sprawl in Michigan. Approximate number of recommendations of the council; Leader of the council; Possible impact of the study on state's policy on the development of land.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics