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| A gauging Station is a site on a river which has been selected, equipped and operated to provide the basic data from which systematic records of water level and discharge may be derived. Essentially it consists of natural or artificial river cross section where a continuous record of stage can be obtained and where a relationship between stage and discharge can be determined. | |
| Because water levels change regularly, a water level recorder is placed on one of the banks. The recorder is linked to the water level of the river via a pipe system. The purpose of the water level recorder is to obtain a continuous record of water level variation. | |
| The following instruments are used for data logging in the Mpumalanga region | |
| Mechanical
Recorder (Type X) This recorder uses a float and counter weight as sensor. The float cable runs over a pulley and turns the axle of the recorder as the water level rises or drops. A pen is connected to the axle which draws a line on a graph paper that represents the flow height. |
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| Thalemedes
(Electronic data logging instrument) This recorder also uses a float and counter weight as sensor. The data is stored electronically and can be retrieve with a Data reader or a Laptop. A cell phone modem can be connected to the Logger and flow records can be retrieved directly from the office. |
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| Ott -
Log (Electronic data logging instrument) This recorder uses a Probe as a sensor. The data is stored electronically and can be retrieve with a Data reader or a Laptop. A cell phone modem can be connected to the Logger and flow records can be retrieved directly from the office. |
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