Patent ID: 9658093
Date: 2017-05-23
CPC Classifications: E21B,G01F,G01N

Claim:
1. A water exchange meter at surface water/sediment interface comprising: a chamber fixedly installed at the bottom of a stream and having a filling medium there inside; a measuring unit of vertical hydraulic conductivity including a storage pipe to communicate with the chamber by a connection line and to have a hydraulic head difference with the chamber for measuring the hydraulic head difference between upper and lower portions inside the chamber, and measuring the amount of the water induced into the storage pipe from the lower portion to the upper portion inside the chamber and measuring the flow rate of the water so as to obtain a saturated vertical hydraulic conductivity of the medium; and a vertical hydraulic gradient measuring unit installed around and at both sides of the chamber and is detachable from the chamber after the saturated vertical hydraulic conductivity is measured and the measuring unit of vertical hydraulic conductivity is removed from the chamber, and communicatedly connected to the chamber through upper and lower portions of the chamber for continuously measuring the vertical hydraulic gradient between two portions of the upper and lower of the chamber and by multiplying the vertical hydraulic gradient and the saturated vertical hydraulic conductivity so as to measure the water exchange through the chamber.