Experiments on conversion coefficient between electricity consumed and
water pumped for agricultural wells in Beijing plain
Yin Shiyang1,2, Wu Wenyong2, Liu Honglu2, Sun Zhenhua3, Qi Xinghui2, Yuan Guixia2
1.School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing 100083, China; 2.Water Resources Research Institute, Beijing Water Science & Technology Institute, Beijing 100048, China; 3. Changping District Water Authority, Beijing 102200, China
Abstract:A series of systematic tests were conducted to calibrate conversion coefficient between electricity power consumed and water pumped for agricultural wells by means of 62 monitoring points located at different vadose zone structures and groundwater tables in the up, mid and downstream alluvial fans of River Chaobai and River Yongding. The conversion coefficients between the electricity consumed and water pumped were obtained for the agricultural wells distributed in the different alluvial fans based on the realtime water flow rate, electricity consumed and dynamic level of groundwater, which were measured by using the remote water flow rate, electricity power and dynamic groundwater level monitoring systems as well as a realtime data transmission system. It was identified that the aquifer water abundance and local groundwater level are the dominant factors for determining a conversion coefficient. Moreover, the conversion coefficients under various water abundances and groundwater levels were compared, the coefficient is in a range of 2.53-4.88 m3/(kW·h) for the counties and districts in Beijing. Not only can this outcome provide a technical support for an electricity-water conversion metering system to be applied in Beijing even in the whole nation, but also it can improve the accuracy of the system.