水温与水中尸体上浮时间的关系

Relationship between Water Temperature and Floating Time of Aquatic Cadavers

目的研究水温与水中尸体上浮时间之间的关系,为更精确地定位搜索浮尸提供参考。方法建立17~30℃水温下豚鼠溺死后上浮模型,记录尸体上浮时间。收集32例珠江水域浮尸案件,整理尸体上浮时间和事发水域水温。分别构建豚鼠尸体上浮时间、真实案例浮尸上浮时间与水温的关系模型。结果尸体上浮时间与水温呈负相关。豚鼠尸体上浮时间与水温关系的幂函数拟合方程为y=1×1015x-10.530(R2=0.871,P<0.01),案件尸体上浮时间与水温关系的幂函数拟合方程为y=3×106x-3.467(R2=0.802,P<0.01)。结论尸体平均上浮时间与水温具有幂函数关系,可为浮尸的定位及建立搜索模型提供参考。

Objective To study the relationship between water temperature and floating time of aquatic cadavers,providing a reference for more precise positioning and searching for floating corpses.Meth⁃ods The floating model of guinea pig after drowning at 17-30℃was established,and the floating times of carcasses were recorded.The collected data of 32 floating corpse cases in the Pearl River were sorted out and analyzed according to the floating time of corpses corresponding to each degree of water temperature.The relationship models between water temperature and the floating time of guinea pig carcass,and between that and the floating time of real cases were established.Results The floating time of the cadaver was negatively correlated with water temperature.The power func‐tion fitting equation of the relationship between floating time and water temperature of guinea pig carcass was y=1×1015x-10.530(R2=0.871,P<0.01),and the power function fitting equation of the relation‐ship between corpse floating time and water temperature was y=3×106x-3.467(R2=0.802,P<0.01).Conclu⁃sion It is found that average floating cadaver time has a power function with water temperature,which provides a reference for locating floating cadavers and establishing search models.