Research of Time Domain Reflectometry in Measuring Water Content of Marine Sediments

Abstract

Abstract:

Time Domain Reflectometry (TDR) has been widely used in water system investigation in agriculture, geosciences, etc. The experiments in this paper show that with a conventional TDR probe we can not measure water content of the sediment where pore water salinity is higher than about 0.5% in weight. Therefore, a coated TDR probe was developed and successfully used in measuring water content of the highsalinity sediments. The dielectric constants were observed when adding solutions with 0, 0.5, 2 and 3.5 percent of salinity to the dry sands respectively, and the results were used to reveal the empirical relations between water content and dielectric constants, which enabled us measuring water content of marine sediments with TDR. The study have significances for introducing TDR technology in measuring water content and hydrate saturation of marine sediments.

Key words: Time Domain Reflectometry, water content, high salinity, marine sediment, coated probe

CLC Number:

P736.21

HU Gao-Wei, YE Yu-Guang, DIAO Shao-Bo, ZHANG Jian, LIU Chang-Ling. Research of Time Domain Reflectometry in Measuring Water Content of Marine Sediments[J]. Geoscience, 2010, 24(3): 622-626.

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