摘要
阐述了钉螺起动流速试验研究成果。由于钉螺对河床具有吸附作用，因而钉螺起动可概括为三种不同起动状态：第一种为定床有吸附力起动，起动流速在１．０ｍ／ｓ以上；第二种为动床有吸附力起动，起动流速约在０．３～０．４ｍ／ｓ之间；第三种为无吸附力起动，起动流速在０．１４～０．１９ｍ／ｓ之间。钉螺无吸附力起动可利用钉螺起动流速公式计算。
This paper chiefly addresses the results of experimental study on flow velocity of incipientmotion of snails(Oncomelania hupensis).Seeing that the snails are a animal of life,they have an ad-sorption to river bed.Beginning of snail motion can be generalized into three different kinds of states.The first state is adsorption of the snails to fixed bed and flow velocity in such a case is more than1.0m/s,the seeond is that to mobile bed and the flow velocity is about 0.3～0.4m/s correspondingly,and the third is incipient motion without adsorption and its flow velocity is 0.14～0.19m/s. Beginning of snails motion without adsorption may be calculated by a formula for the flow velocity oftheir critical motion.
出处
《长江科学院院报》
CSCD
北大核心
1994年第4期23-29,共7页
Journal of Changjiang River Scientific Research Institute
基金
湖北省科委
关键词
渠道
钉螺
吸附力
流速
试验
snail
adsorbed force
incipient motion
flow velocity
