关键词: 钙质砂, 孔隙水电导率, 体积含水率, 线性关系, 计算模型

Abstract: Calcareous sand is generally saturated with salt water in marine environment. Conductivity is an important parameter in salinity evaluation which can reflect the salinity of the water. Therefore, the conductivity of calcareous sand has great significance in water quality evaluating of calcareous sand in marine environment. In this paper, we selected an exposed open calcium sand on a calcareous sand island, and buried triple sensors of soil conductivity, volumetric water content and temperature at the depths of 0.5, 1.0, 1.5 m to monitor the calcareous sand conductivity and volumetric water content. The relationship between calcareous sand conductivity and pore water conductivity is analyzed based on conductivity and volumetric water content site observation, conductivity indoor testing and Manta2 water quality sensor verification of calcareous sand with different gradations. The results show that the conductivity of calcareous sands has linear relationship with the volumetric water content and the conductivity of pore water respectively, and then promote a calculation model for the conductivity of calcareous sand.

Key words: calcareous sand, conductivity, volumetric water content, linear relationship, calculation model