Baotu Spring

The Baotu Spring is a socially noteworthy artesian karst spring situated in the city of Jinan, Shandong, China. It is specified in the Spring and Autumn Annals, one of the Five Classics of Chinese writing, and was pronounced the "Number One Spring under the Heaven" by the Qianlong Emperor in the Qing tradition. The Baotu Spring is the most eminent among the more than 70 named artesian springs in the downtown territory of the city of Jinan. The water of every one of these springs starts from an Ordovician karst aquifer under the city.

As the landscape around Jinan slants starting from the south toward the north, the energize region for the aquifer is situated in the sloping zone toward the south of the city. The revive territory of the springs covers 1,500 square kilometers, out of which 550 km2 give coordinate energize and 950 km2 backhanded energize. Out and out, the springs encouraged by the aquifer have a release of around 300,000-350,000 cubic meters for every day. Since the 1970s, the springs have quit streaming a few times on the grounds that an excess of water has been taken out from the aquifer for human utilization.

The Baotu Spring is a piece of a group of around 20 named springs. Water age gauges propose that its water starts from shallow dissemination. The spring pool of the Baotu Spring is bolstered by a submerged limestone water through three outlets, the volume of the water leaving the spring can achieve top qualities up to 1.6 cubic meters for each second. The water planes from the spring are said to have achieved highs up to 26 meters. The water temperature stays steady of 18 degree Celsius through the whole year.