Did You Know that 6.5 million people in the United States alone have intellectual disabilities (including mild to profound cognitive impairment)? This week, a group of ADS volunteers had the privilege to meet and work alongside some special needs adults to support a 501(c)(3) organization in Harvest, AL – Next Step […]
Scattergraph
37 posts
Understanding the key relationships between basin sizes selected for monitoring within a given area and the resultant accuracy of Infiltration and Inflow (I&I) analysis has become a critical factor for implementing cost-effective management of I&I. Take a dive into the key principles for basin sizing to learn how many forward-looking […]
29. Drifting Velocity Sensor This scattergraph displays data from a flow monitor with a drifting velocity sensor. Note that the reported flow velocity drifts over a wide range without a corresponding change in depth. This flow monitor was equipped with an electromagnetic velocity sensor, which is subject to fouling from […]
28. Drifting Depth Sensor Most flow monitoring data can be described by the Manning Equation using either the Design Method, the Lanfear-Coll Method, or the Stevens-Schutzbach Method. Data that do not lie on a pipe curve generated by one of these methods indicate that either the hydraulics are different or […]
27. Undular Jump A hydraulic jump or other transcritical flow condition may reduce the accuracy of a flow monitor. However, this effect is not strictly limited to critical flow (Fr = 1), but may also occur within a wider range of near-critical flow conditions. Research by Chanson, Hager, and others […]
26. Hydraulic Jump This scattergraph is from a site that experiences a hydraulic jump. This condition occurs when flow transitions from supercritical to subcritical flow. In this example, the hydraulic jump is located upstream from the monitor at lower flow rates, and the subcritical side of the hydraulic jump is […]