[1]HUA Rui,XU Xuexuan,ZHANG Shaoni.Research for Suitable Brilliant Blue Concentrations to Trace Soil Water Movement[J].Research of Soil and Water Conservation,2016,23(06):73-77.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 06
Page number:
73-77
Column:
Public date:
2016-12-28
- Title:
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Research for Suitable Brilliant Blue Concentrations to Trace Soil Water Movement
- Author(s):
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HUA Rui1, XU Xuexuan2, ZHANG Shaoni3
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1. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling, Shaanxi 712100, China;
3. Shaanxi Huadi Real Estate Appraisal and Consulting Co., LTD. Xi’an 710065, China
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- Keywords:
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brilliant blue; infiltration rate; water breakthrough time; steady effluent rate; retardation coefficient
- CLC:
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S152.7+2
- DOI:
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- Abstract:
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Although brilliant blue is one of dyes which is widely used to trace water movement path, there is a need to examine whether the absorption of brilliant blue affects the water movement and how researchers can choose a more suitable dying concentration. In order to determine the suitable concentration of brilliant blue by comparing steady effluent rate, water breakthrough time and the condition of deviation between wetting front and dying front, this infiltration experiment is set in three soil types by using 5 brilliant blue concentrations. The results are demonstrated as follows. (1) Among the ranges of 0~2.0 g/L, the addition of brilliant blue has no apparent effect on the infiltration behavior, namely, it is feasible to use brilliant blue to trace water infiltration. (2) When the brilliant blue concentration is 1.5 g/L, the water breakthrough time and steady effluent rate are almost close to control group (0.0 g/L), but differences are small between different concentrations; however, according to the retardation coefficient (R) caused by the differences between dying front and wetting front, the most suitable concentration for Heilu soil is 1.5 g/L brilliant blue, 1.5~2.0 g/L brilliant blue for loessial soil and 2.0 g/L brilliant blue for sandy soil. (3) There is significant positive correlation between R and clay content. Brilliant blue, which has adsorption capacity, is most suitable for the soils whose clay contents are low. By comprehensive consideration, it is feasible to use 1.5~2.0 g/L brilliant blue to trace soil water movement.