凍線
凍線(frost line、frost depth 或 freezing depth)是指冬季時凍結之表層土壤與未凍結之下層土壤間的分界線。
不同地點的凍線例子
參考文獻
- . library.municode.com. [2018-03-13]. (原始内容存档于2018-03-14) (英语).
- (PDF) 2007. Minnesota Department of Labor and Industry. 2007-03-09 [2010-01-04]. (原始内容存档 (PDF)于2011-07-18).
- (PDF). Minnesota Department of Labor and Industry. 2007-10-09 [2010-01-04]. (原始内容 (PDF)存档于2010-05-27).
- (PDF). Ontario Ministry of Transportation. Nov 2010 [16 January 2014]. (原始内容存档 (PDF)于2019-01-15).
- . Walters Forensic Engineering. [16 January 2014]. (原始内容存档于2019-01-15).
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