Flumes offer distinct advantages over sharp-crested weirs: 1  For the same control width, the head loss for a flume is about one-fourth of that needed to operate a sharp-crested weir. 2  The velocity of approach is part of the calibration equations for flumes.
How long does alcohol stay in your system saliva tests - How long does alcohol stay in my system for a saliva test? Depends. Alcohol has an approximate detection time of 12-24 hrs, The detection time depends on the maximum level of blood alcohol content (BAC) which can vary. One serving of alcohol can be fully absorbed in the blood stream 30 min up to 2 hrs after intake. The body metabolizes aprox 0.25 oz per hour.
12-24 hours: Marijuana is detectable in the saliva test only for about 12 to 24 hrs. It can be detected in the urine much longer and up to 90 days in a hair follicle sample. Best wishes. ...Read more.aliva: 1-10 days: With a single use of marijuana, thc can be detected in saliva for 1-10 days. Hair can last longest lasting of all: up to 90-120 days. Urine is the fluid usually tested, though. With a single use, thc is detectable in urine for 5-8 days. ...Read more.