摘要
根据青岛电厂运行观测和模拟实验，分析了卷载效应中机械损伤和高温冲击对梭幼鱼（ＬｉｚａｈａｅｍａｔｏｃｈｌｉａＴｅｍｍｉｎｃｋａｎｄＳｃｈｌｅｇｅｌ）和对虾仔虾（ＰｅｎａｅｕｓＣｈｉｎｅｓｉｓＯｓｎｅ－ｃｋ）的危害．研究表明，电厂冷却系统内流速≥２．Ｏｍ／ｓ，滤网孔径８ｍｍ时，对体长７─１７ｍｍ和２０─３４ｍｍ仔虾的致死率分别为２８．３％─５５．３％和２８．６％─６６．９％；对体长２０─４０ｍｍ梭幼鱼的致死率为６３．４％─７８．８％．卷载致死率与生物的密度、体长及形态特征有关．模拟实验结果为：０．９─１．０５ｍ／ｓ的流速下，孔径８ｍｍ的滤网对体长２５─４２ｍｍ梭幼鱼的阻截致死率为４０％─４８．３％，孔径１０ｍｍ的，致死卒为３０％─３３％；４０℃水温冲击２ｍｉｎ，梭幼鱼死亡率为２０％．
Entrainment injured rate of young fish and postlarve shrimp by high tem perature shock and mechanical force in the power plant cooling system were analyzed based on simulating test and field observation.The results showed that lethal rate of the postlarve shrimp of 7─17mm and 20─30mm are 28.3% ─55.3%,diameter of screening is 8rnm in the power plant cooling system.In the same condition,the lethal rate of young fish of body length 20─40mm is 63.4%─78.8%. Diameter of screening are 8mm and 10mm,obstratice rate are 40%─48.3%and 30%─33% respectively,when water flow speed is 0.9─ 1.05m/s and body length of young fish is 25─42mm.Lethal rate of young fish is 20%with water temperature of 40℃ and shock duration of 2 minu- tes.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1994年第1期47-55,共9页
Acta Scientiae Circumstantiae
关键词
卷载效应
幼鱼
仔虾
高温冲击
电厂
entrainment effect
young fish
postlarve shrimp
simulating test
high temperature shock.
