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Climatic Parameter TMI in Subgrade Soils
This paper evaluates historical climatic data acquired from Mesonet weather stations across Oklahoma for pavement applications. Thornthwaite Moisture Index (TMI), a climatic parameter, is widely used in geotechnical engineering as well as other disciplines to evaluate the changes in moisture conditions in near surface soils in the unsaturated zone. It has become an important parameter for predicting the equilibrium soil suction beneath the moisture active zone, as well as the depth to constant suction. This paper employs three different TMI calculation methods (Thornthwaite 1948; Thornthwaite and Mather 1955; and Witczak et al. 2006) and produces TMI-based contour maps for Oklahoma using the climatic data from Mesonet stations. The results are analyzed and compared within the three methods. The evaluation of the analysis indicates that caution should be exercised when adopting a TMI-based approach in predicting climate-related unsaturated soil parameters (e.g., depth to constant suction and equilibrium soil suction).
Climatic Parameter TMI in Subgrade Soils
This paper evaluates historical climatic data acquired from Mesonet weather stations across Oklahoma for pavement applications. Thornthwaite Moisture Index (TMI), a climatic parameter, is widely used in geotechnical engineering as well as other disciplines to evaluate the changes in moisture conditions in near surface soils in the unsaturated zone. It has become an important parameter for predicting the equilibrium soil suction beneath the moisture active zone, as well as the depth to constant suction. This paper employs three different TMI calculation methods (Thornthwaite 1948; Thornthwaite and Mather 1955; and Witczak et al. 2006) and produces TMI-based contour maps for Oklahoma using the climatic data from Mesonet stations. The results are analyzed and compared within the three methods. The evaluation of the analysis indicates that caution should be exercised when adopting a TMI-based approach in predicting climate-related unsaturated soil parameters (e.g., depth to constant suction and equilibrium soil suction).
Climatic Parameter TMI in Subgrade Soils
Yue, Er (author) / Chen, Lizhou (author) / Bulut, Rifat (author) / Cheng, Qi (author)
International Symposium of Climatic Effects on Pavement and Geotechnical Infrastructure 2013 ; 2013 ; Fairbanks, Alaska
2014-04-02
Conference paper
Electronic Resource
English
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