Construction of basic database for application of river water-source heat pump in Chongqing

Researches the annual change characteristics of water temperature, quality and level of the Yangtze River and the Jialing River in Chongqing district by the annual monthly testing. The results show that the water temperature of the two rivers roughly maintains constant in the vertical section, while the water of the Yangtze River is more suitable as cold and heat sources than the Jialing River, for its temperature lower in summer and higher in winter. The problem of high turbidity of the two rivers and the higher ferric ion concentration for the Yangtze River must be solved. The change of the water level of the two rivers in Chongqing district is respectively about 3.8 meters and 5.4 meters, and frequent change occures.