Fig. 2
Hydrogeological map and section map. [1: Specific yield of single well 300–500 m³/(d·m); 2: Specific yield of single well 100–300 m³/(d·m); 3: Specific yield of single well < 100 m³/(d·m); 4: The distribution area of aquifers mainly composed of medium sand (More than 50% of the total thickness of the aquifer); 5: The distribution area of aquifers mainly composed of fine sand (More than 50% of the total thickness of the aquifer); 6: The distribution area of aquifers mainly composed of silt (More than 50% of the total thickness of the aquifer); 7: Boundary line of water yield property; 8: Isopleth of burial depth of aquifer group bottom plate; 9: Isopleth of thickness of aquifer in aquifer group; 10: I-I’section; 11: borehole and its numbering; 12: Silty sand; 13: Fine sand; 14: Medium sand; 15: Coarse sand; 16: Unknown particle size sand; 17: Clayey silt; 18: Mild clay; 19: Silt stratification; 20: Clay; 21: Boundary line of aquifer group; 22: The boundary of lithology in geological strata; 23: The boundary line between saltwater and freshwater (sawtooth direction is saltwater); 24: Borehole and its numbering, exposed lithology].
