Analysis of natural resources and environment eco-geological conditions in the Xiong'an New Area

The investigation of natural resources, environmental background and ecological geological conditions is the basis of urban geological survey, which can provide effective basic geological support for urban land spatial planning, construction and delicacy management. With the acceleration of urban development in Xiongan New Area, earth-shaking changes have taken place in its natural resources and ecological environment. Based on the comprehensive geological survey results of Xiongan New Area, the background conditions of natural resources and ecological environment are defined in Xiongan New Area, the variation trend of natural resources is analyzed in the construction cycle, and the natural resources and ecological issues are discussed that should be paid attention to in future urban construction. The results show that the type of land use has been changed dramatically after the establishment of Xiongan New Area. Woods land area increased by about 58.1 km², grass land area increased by about 2.0 km², cultivated land decreased by 68.8km², and construction land increased by 7.2 km². The soil quality is mainly superior and good. The water table of shallow and deep groundwater generally flows from northwest to southeast in Xiongan New Area and gradually decreases, and depression cones of groundwater exit locally. The depth to ground water in shallow aquifers, mainly stabilizing and rising, is generally 5~20 meters. The depth to ground water in deep aquifers is generally 25~35 meters, and the area of water table decline is still relatively high. The wetland of Baiyangdian is rich in animal and plant resources and its water quality is improving gradually. The exploitation and utilization conditions of geothermal resources are good, and the recoverable heat of geothermal fluid is 10.10×10¹⁶J/a, equivalent to 3.4603 million tons/year of standard coal. The ecological environment geological problems should be focused, such as land subsidence and ground cracks, changes of groundwater table, sand liquefaction, potholders and soft soil, etc. existing in the New Area. The effective preventive measures should be taken when necessary to avoid engineering accidents caused by ecological environment geological problems.