China News Service, Beijing, November 21 (Reporter Pang Wuji) The Ministry of Natural Resources and China Geological Survey announced on the 21st the comprehensive geological survey results of the Xiongan New Area, including engineering geology, land quality, groundwater and land subsidence, geothermal clean energy, and Baiyangdian ecology Environment and other content.
First, the Xiongan New District is rich in geothermal resources, with large reserves, high temperature, good water quality, easy recharge, and suitable for large-scale development and utilization under technical, economic, and environmentally feasible conditions, which can provide a stable, safe and clean city for building a green, ecological and livable new city. Energy supply.
The survey results show that the shallow geothermal energy in Xiongan New Area is widely distributed in the 0-200 meters underground, which is suitable for the utilization of underground ground source heat pumps. The available resources are equivalent to 4 million tons of standard coal per year, which can meet about 100 million square meters. Building heating and cooling needs.
The medium-deep geothermal heat is mainly underground hot water, which is concentrated in the three large and medium-sized geothermal fields of Xiongxian, Rongcheng and Gaoyang, 600-4000 meters underground, and the temperature of the thermal reservoir is 60℃-130℃. The underground hot water is under the condition of balanced extraction and irrigation. The available resources are 400 million cubic meters per year, which is equivalent to 3.46 million tons of standard coal per year, and can support heating area of more than 100 million square meters.
The second is that the quality of the soil environment in the Xiongan New Area is generally excellent, and the survey results can provide a scientific basis for the delineation of permanent basic farmland and the adjustment of construction land planning in the new area.
The land quality survey and evaluation work of the Xiongan New District found that the soil environmental quality in the starting area is generally clean and free of pollution risks, and 99.241% of the first-class land without pollution risks.
The investigation newly discovered 574 hectares of selenium-rich farmland, mainly distributed in farmland areas such as Nanzhang Town and Xiaoli Town in Rongcheng County.
Third, the quality of groundwater in the Xiongan New Area is generally good and stable, which can provide a guarantee for the safe water supply in the new area.
The survey showed that the quality of shallow groundwater in Xiongan New Area is generally good, while deep groundwater is of good quality, and strontium-rich groundwater is widely distributed.
The reserve water source target area delineated in the northwest of Rongcheng can provide guarantee for emergency water supply in Xiongan New Area.
The fourth is to preliminarily build a multi-scale three-dimensional structure of underground space within a depth of 10,000 meters in the starting area to help the construction of "transparent Xiong'an".
The geological survey work established a three-dimensional geological model with meter-level accuracy in the starting area of Xiongan New Area with a depth of 200 meters underground, evaluated the conditions for development and utilization of underground space and the suitability of engineering construction, and constructed underground aquifers and underground aquifers in the starting area of 10,000 meters in depth. The multi-level and multi-scale three-dimensional structure framework of underground space, such as thermal reservoirs and deep detection layers, effectively supports the development and utilization of underground resources in Xiongan New Area and facilitates the construction of "transparent Xiongan".
Fifth, the preliminary investigation of the geological structure and permeability of the shallow part of Yangdian District will serve the ecological restoration of Baiyangdian Lake.
Using aerial geophysical prospecting and 118 geological boreholes, a preliminary model of the geological structure of the Baiyangdian area with a shallow depth of 50 meters was established, and the spatial distribution and permeability of sand, clay, silt and other major strata were analyzed, and the interaction between surface water and groundwater was studied. Provided basic geological data for Baiyangdian ecological restoration.
Sixth, a comprehensive monitoring network for the natural resources and environment of the Xiongan New Area has been initially established to realize online integration of monitoring data and information services.
Focusing on the need to solve major resource and environmental issues, the comprehensive natural resources and environmental monitoring network has been initially built to achieve continuous dynamic monitoring of indicators such as groundwater level, water quality, soil environmental quality, spatial distribution of forest and grass wetness, land subsidence, and development area. Relying on the "transparent Xiong'an" digital platform, the query statistics, comprehensive analysis and early warning services of all-element monitoring information have been basically realized.
Since April 2017, China Geological Survey has conducted comprehensive geological surveys.
The above survey results will fully support the planning, implementation, supervision, use control and ecological protection and restoration of the Xiongan New Area.
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