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SPATIAL VARIABILITY OF HYDRAULIC CONDUCTIVITY AND SODIUM CONTENT OF DESERT SOILS: IMPLICATIONS FOR MANAGEMENT OF IRRIGATION USING TREATED WASTEWATER
Adhikari, P.; Shukla, M. K.; Mexal, J. G.
通讯作者Adhikari, P.
来源期刊TRANSACTIONS OF THE ASABE
ISSN2151-0032
EISSN2151-0040
出版年2012
卷号55期号:5页码:1711-1721
英文摘要

Information on soil hydraulic properties, spatial variability, and relation to soil chemical properties is crucial for making management decisions for lands affected by anthropogenic activities. Proper management strategies based on the spatial variability of soil hydraulic properties are necessary to reduce the detrimental effect on soil environment due to the continuous application of wastewater In situ infiltration tests were conducted at the West Mesa Land Application Facility near Las Cruces, New Mexico, to determine the spatial variability of hydraulic properties and quantify the macroporosity using tension infiltrometry Infiltration tests were conducted for an hour at the center of 50 x 50 m sampling grid at pressure heads (psi) of -30, -20, -10, -5, and 0 cm during March-April 2009. Wooding’s equation was used to calculate saturated (K-s) and unsaturated (K(psi)) hydraulic conductivity from the steady-state infiltration rate. Coefficients of variation (CV) for each of the five classes of K-s were low to moderate, and semivariograms displayed both short and long range variability. Kriged maps of K-s showed that classes I, II, and III were concentrated at the northeast and southwest sides of the study site, where higher Na+ was detected, and classes IV and V were at the center of the study site, corresponding to lower Na+ levels. Significantly lower macroporosity was observed in the area were K-s was lower and Na+ content higher Therefore, additional increases in Na+ could further decrease the K-s and macroporosity and may affect water uptake by the native vegetation. Change in the wastewater application pattern by applying higher amounts of wastewater in the areas where soil Na+ concentrations are lower would be beneficial for sustaining soil quality and plant community.


英文关键词Hydraulic conductivity Macropore Semivariograms Tension infiltrometer Wastewater
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000311330100008
WOS关键词PHYSICAL-PROPERTIES ; INFILTRATION ; MACROPOROSITY ; SALINITY ; CLASSIFICATION ; MESOPOROSITY ; SODICITY ; FIELD ; FLOW
WOS类目Agricultural Engineering
WOS研究方向Agriculture
来源机构New Mexico State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/175189
作者单位New Mexico State Univ, Dept Plant & Environm Sci, Las Cruces, NM 88003 USA
推荐引用方式
GB/T 7714
Adhikari, P.,Shukla, M. K.,Mexal, J. G.. SPATIAL VARIABILITY OF HYDRAULIC CONDUCTIVITY AND SODIUM CONTENT OF DESERT SOILS: IMPLICATIONS FOR MANAGEMENT OF IRRIGATION USING TREATED WASTEWATER[J]. New Mexico State University,2012,55(5):1711-1721.
APA Adhikari, P.,Shukla, M. K.,&Mexal, J. G..(2012).SPATIAL VARIABILITY OF HYDRAULIC CONDUCTIVITY AND SODIUM CONTENT OF DESERT SOILS: IMPLICATIONS FOR MANAGEMENT OF IRRIGATION USING TREATED WASTEWATER.TRANSACTIONS OF THE ASABE,55(5),1711-1721.
MLA Adhikari, P.,et al."SPATIAL VARIABILITY OF HYDRAULIC CONDUCTIVITY AND SODIUM CONTENT OF DESERT SOILS: IMPLICATIONS FOR MANAGEMENT OF IRRIGATION USING TREATED WASTEWATER".TRANSACTIONS OF THE ASABE 55.5(2012):1711-1721.
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