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1. How to measure water volume
1. Pipeline water can be detected and accumulated by selecting vortex flowmeter, electromagnetic flowmeter, orifice flowmeter, water meter, etc. according to the diameter and flow rate.
2、 Open ditches and channels can be used to calculate the accompanying flow rate per unit time based on the flow velocity detection method.
3、 The pumping capacity of the water storage station pool can be calculated based on the rate of water level reduction.
4、 Large water outlets can be used to estimate the water flow rate. Calculating unit time traffic is pure and foolish.
2. How to know the flow rate of the water pump? The flow rate of a water pump is the amount of liquid (volume or mass) that the pump delivers per unit time. ① The flow rate of a water pump is usually represented by the letter Q. The flow units of a water pump are m3/s (cubic meter/second), L/s (liter/second), or M3/h (cubic meter/hour), and the conversion relationship between them is: 1m3/s=1000L/s=3600m3/h. ② Design flow rate: Under the premise of meeting efficiency requirements, the flow rate is generally used as a reference point to determine the energy gain (lifting and opening stroke) obtained from the pump inlet to outlet at different flow rates, and then draw the performance curve. ③ Rated flow rate: Based on the intermediate value (limit value) of the flow rate obtained from the test, the rated flow rate of the water pump will be indicated on the nameplate when it leaves the factory. Under this flow rate data, the working efficiency is the highest. If it deviates from this flow rate during use, the efficiency of the water pump will decrease. If it deviates too much, it may also caus
3. What are the specific steps for flushing a well during a pumping test?
The specific steps for flushing a well during a pumping test include four main stages: preliminary preparation, equipment installation, formal flushing, and effectiveness verification. The entire process requires strict adherence to hydrogeological standards to ensure data accuracy.
. 1. Preliminary preparation • Equipment inspection: Ensure that submersible pumps, flow meters, water level gauges, cables, pipelines, and other equipment are in good condition, and that the pump head and flow rate match the design requirements of the test well • Well condition confirmation: Measure the depth of the static water level, remove debris from the wellhead, and check whether the well pipe is blocked or damaged • Safety protection: Set up wellhead protective barriers, wear safety ropes, and equip leakage protection devices on site. 2 Equipment installation - Lift the submersible pump to a location below the aquifer (usually 5-10 meters below the dynamic water level), and install a stabilizer on the pump body to avoid collision with the wellbore. Install the outlet pipeline and flow monitoring device, and seal the pipeline connection to prevent leakage. Deploy an automatic water level monitoring device, and it is recommended to set the sampling interval to 1-5 minutes (according to the requirements of the "Hydrogeological Survey Code" GB 50027-2018) Formal well washing operation • Initial strong washing: Use maximum flow rate to continuously pump water for 2-4 hours until the turbidity of the effluent significantly decreases
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