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[1]LIU Gang,LI Zhanbin,XU Guoce,et al.Analysis on Variation of Groundwater Electrical Conductivity over Time in Guanzhong Plain Irrigation District[J].Research of Soil and Water Conservation,2018,25(06):216-220.

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Analysis on Variation of Groundwater Electrical Conductivity over Time in Guanzhong Plain Irrigation District

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 06 Page number: 216-220 Column: Public date: 2018-10-26

Title:: Analysis on Variation of Groundwater Electrical Conductivity over Time in Guanzhong Plain Irrigation District

Author(s):: LIU Gang^1,2, LI Zhanbin^1,3, XU Guoce¹, YANG Yuanyuan¹, CHENG Yuting¹, YAO Jingwei¹; 1. State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an 710048, China;
2. Hanjiang-to-Weihe River Valley Water Diversion Project Construction Co., Ltd., Shaanxi Province, Xi’an 710010, China;
3. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China

Keywords:: Luohuiqu; groundwater; electrical conductivity; temporal stability

CLC:: S273.4

DOI:: -

Abstract:: Soil salinization is the current constraint on agriculture development in the irrigation areas throughout the world. To study the temporal and spatial variation of groundwater electrical conductivity (EC) is of importance for guiding agricultural irrigation in irrigation districts. Based on the long term monitoring data of EC in the 51 observation wells in Luohuiqu Irrigation District, relative difference analysis and non-parametric Spearman’s rank correlation test were used to check the EC temporal stability. The results indicated that 21 wells were slightly saline and 30 wells were moderately saline. The bigger the EC was, the greater the EC changed during the entire measurement period. The mean groundwater EC of the 51 wells did not show the increasing trend in the entire measurement period, but demonstrated moderate spatial variability with coefficient of variation (CV) values ranging from 61% to 72%. The groundwater EC exhibited strong spatial and temporal stability patterns with Spearman correlation coefficients ranging from 0.81 to 0.98 (p < 0.01). The mean EC representative location in the study area was well 2^#. It was little difference between the predictive groundwater EC values based well 2^# and the actual mean groundwater EC values of the study area. In conclusion, the groundwater EC is strong temporal stability in Luohuiqu Irrigation District. It is feasible to obtain the mean groundwater EC of the study site through the mean groundwater EC representative location. The method is of great importance to monitor the mean groundwater EC and to determine the correct irrigation time.

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