【摘要】 本研究根据钉螺壳形的几何特征，进行了钉螺静水沉降观测；运用泥沙运动力学理论，推导并建立了钉螺静水沉速公式；对公式中反映钉螺壳形的三个主要物理变量作了较详细的阐述。从公式的结构可以看出，各变量的物理意义明确，理论基础可靠，由公式计算出的钉螺静水沉通理论值与实测值之间无显著性差异，具有实用价值。更多还原

【Abstract】 Observation and measurement on the snails’ dropping in stable water was performed,based on the geometric characteristics of the snail shell- According to the theory of silt movement dynamics,the formula of dropping speed of Oncomelania hupensis in stable water was established to represent the relation to the geometric characteristics of the snail shell. Results showed a clearly physical meaning and theoretical basis in each variable in the formula. There is no significant difference in the snail dropping speed between measurement data and theoretical value calculated from the formula. The findings in the study can be practically applied in preventing snails’ dispersal.更多还原