Environmental Engineering & Techniques On-Line Water Quality Measuring Stations are designed and used for detection of chemical and physical parameters of Ground- and Surface Waters. Water Level  &  Water Gauging Stations  WGS   Waterquantity The continuous measurement of water quantity is important for various projects like flood forecasting, flood prevention, irrigation, climatic change monitoring but also for hydro power plant construction and operation. The discharge calculation is usually done by water level, cross section and flow, why an automatic water gauging station and circular flow measurements during different water levels across the profile in the beginning are necessary for accurate results. From this interrelation between water level and flow rate the related values must be measured one by one or by using new technology like ADCP (acoustic doppler current profiler). This instrument is able to deliver accurate discharge results, but sometimes it could be tricky to calibrate the instrument. The following measuring instruments are used to measure the discharge:   Waterlevel: Radar Sensors  are installed above the maximal water level and are not connected with the water, so there is no doubt about damages or malfunction during high water levels or high sediment load. Piezo-Pressure Sensors are mounted in pipes or shafts below the water surface. Disadvantages of this sensor types may be the sensitivity against sedimentation and mud in surface waters and sometimes calcification in ground waters caused by electrolysis (e.g. near trains).  Air-Pressure Sensors consist on a compressor and a pressure pipe line which is lead below the water surface. Disadvantage of this sensors may be the abrasion of membranes and valves as well as damages on the pipeline during high water levels. Water level measurement with floating body is not often used nowadays, there is also a high demand in implementation time and material.  Gauge Boards are used for manual read outs of water levels and for check values to set and control the automatic instruments. Flow Measurements: Rotation Flow Measurements are done with a heavy weight torpedo shaped sinker where a propeller is mounted. The water flow drives the propeller and each rotation gives a signal to a counter. the more rotations per time the higher the flow on the specific place of the cross section. There are many different shapes of rotating bodies available. The Tracer - Method is used for small rivers and also for ground water where for example dissolved salt is added into the water and the time which is used to change the conductivity immediately on a specific downstream point is measured.   Precipitation Measurement The precipitation measurement is important for a flood forecasting and flood prevention system. The automatically detection is mostly done by a dipping sensor, a small bowl mounted on a rocker, which empty the bowl when it is filled and sends a signal to a data logger. The amounts of signal in a designated time shows the precipitation. ENVIRTEC.wgs en office@envirtec.info Contact:   Telefon Austria:  +43 699 12 47 65 64 Telefon Indonesia: +62 856 42694822 E-Mail:     office@envirtec.info AUSTRIA ALBANIA  2008 INDIA  2009 INDONESIA  2000 - 2004 PAKISTAN  2007 Impressum On-Line Water Quantity Measuring Stations are designed and used for the detection of the Water Level and the discharge of Surface Waters or also the Water Level of Ground Waters. Overview of all project areas and  places of work via Google Maps.