recently, the public reflected, the two years Baotu Spring and the black tiger spring water level each other, "two springs do not belong to a spring"? City City Landscaping Bureau official said, only on the water level can not be determined whether Baotu Spring and black tiger springs belong to a spring vein. Even if the Baotu Spring and the black tiger spring are in the same spring field, they have formed relatively independent flow fields, which may lead to the slight change in the water level of the two springs.
experts say two springs are in the same spring area
27 days, the reporter learned from the Ji'nan Water Conservancy Bureau that the water level of the black tiger spring exceeded the Baotu Spring water level many times in 2011. For most of 2012, the water level of black tiger spring was lower than that of Baotu Spring. Since 2013, the water level of the black tiger spring has not exceeded the water level of Baotu Spring.
the relevant officials of the Municipal Bureau of parks and gardens indicated that the Baotu Spring and the black tiger spring are in the same spring area. In October 2012, Ji'nan city issued "Ji'nan water ecological civilization city establishment plan (central part of urban area)" ", which clearly defined the range of the spring area of Ji'nan. According to the hydrogeological conditions of Ji'nan, the spring water can be divided into four great springs area: Ji'nan spring area, Bai Quan spring domain, Zhangqiu hundred pulse spring spring domain peace Yin Hong Fan Chi Quan area. From the division of springs, the Baotu Spring and black tiger springs belong to the Ji'nan spring area.
and from the geological structure analysis of Ji'nan, there are a lot of rock fracture zones in the Ji'nan spring area. Among them, the Mashan fault zone and the East Wuwu fault zone are the largest two fracture zones. In addition, there are many small fault zones in this spring area, such as the cultural bridge fault zone in the urban area of Ji'nan and the Qianfo Hill fault zone. These fracture zones will directly affect the groundwater flow and further affect the spewing of springs. According to the exploration of geological departments, the Baotu Spring and hehequan are located in the west of the small fault zone in the Ji'nan spring area, and there are no other fault zones in the middle of the two springs.
two springs each form underground water flow field
it is understood that the Baotu Spring and the black tiger spring springs are from the southern mountain area. The groundwater from the southern mountain area flows from the south to the north through the surface infiltration, the underground dissolving gully, the karst cave, the dark River and so on. The distance between the two springs is about 1 kilometers, and there is no barrier or mountain barrier in the middle. Experts say that it is impossible to speculate on the conclusion that the two springs belong to different springs. If we want to confirm the two springs, we need to carry out accurate geological surveys.
Tian Xiaodong, director of the famous spring protection technology office of Ji'nan Municipal Bureau of parks and gardens, said that the spout condition of spring is directly related to the geological structure. In the geological structure, the buried depth of the Quaternary soil layer at the highest level directly affects the spring surge. The more shallow the Quaternary soil layer is, the larger the spring surge, the deeper it is, the more detrimental to the spring water gushing. According to the geological survey results, the Quaternary strata of the Baotu Spring and the black tiger spring are shallow, so spring springs are formed.
Tian Xiaodong said that in 2012, they made a survey of the two springs, based on the spewing conditions of the Baotu Spring and the black tiger spring, on the characteristics of the macroscopic flow, flow, range and other characteristics of the groundwater in a region. The water volume of Baotu Spring and black tiger springs is large, and the position of springs is a pulling force and driving force to the surrounding groundwater. As a result, the Baotu Spring and black tiger springs have formed their own small water fields, which may cause the two springs to have different levels of water.