In recent years acoustic flow measurement and flow metering has established itself as the standard method for measurement in many hydrological stations but is also used as the basis for various applications, for example for flood protection and flood forecasting. Ultrasonic flow meters are also used in hydro-engineering constructions. With this almost contact free technology data can be recorded continuously and it provides 24/7 monitoring. Such flow monitoring is particularly important in waterways used for shipping, transportation, irrigation, drainage and for cooling water extraction of power plants. A further important use of transit-time open channel flow meters is the transportation of water used for the supply of drinking water. Here the focus lies on detecting the flow rate of water loss at an early stage as it is sometimes difficult to detect small leakages.
By HydroVision GmbH based in Kaufbeuren, GERMANY.
The GEOWEB system offers design flexibility for unpaved roadway surfaces, base stabilization, road shoulders as well as erosion protection of embankments and stormwater drainage channels. The 3D GEOWEB structure offers strength improvements to the road base layer for asphaltic and concrete pavements far greater than delivered by geogrids. A single GEOWEB layer performs well over soft subgrades - while geogrids require 2-3 layers for the same benefit - saving cost and construction time. Unpaved roads built with the GEOWEB system are permeable, and require 50% less infill. Roadway slope and channel designs include vegetation, aggregate or concrete protection.
By Presto Geosystems based in Appleton, WISCONSIN (USA).
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