龙口市中心城区浅层地温变化特征

VARIATION CHARACTERISTICS OF SHALLOW GEOTEMPERATURE IN THE CENTRAL CITY OF LONGKOU

根据龙口市中心城区200 m范围内地温长测孔实测数据,对浅层地温的变化规律进行分析,地表以下至24.44 m范围为变温带,呈现自山前地带向西北平原区变温带影响深度增加;24.44~50 m深度范围为恒温带,从山前地带到冲洪积平原再到黄县凹陷地带,埋深增加,地温降低;50 m以下为增温带,平均地温梯度为2.60℃/100 m,地温梯度由山前地带向黄县凹陷地带增大,相应地温级度从山前地带向西北内陆到凹陷区呈现整体减小的态势。该研究为龙口市浅层地温能开发利用和发展规划提供理论依据和借鉴。

This article analyze the vertical and horizontal distribution characteristics of the shallow geothermal in the central city of the Longkou city according to the ten sites geothermal data measured within 200 m.It indicated that the variable temperate zone ranged from 0 to 24.44 m which is depth of influence increased from piedmont to Northwest plains.The constant temperature zone ranged from 24.44 to 50 m which is depth increases with geothermal decreases from piedmont to alluvial-proluvial plain then to Huangxian county sag zone.The depth below 50 m called the increasing temperature zone.The geothermal average temperature is 15.46℃,and the geothermal gradient is 2.60℃/100 m with increasing from piedmont to Huang xian sag zone.Geothermal levels shows correspondingly an overally decreasing trend from piedmont to Northwest plains then to Huang county sag zone.It could provide a basis for the development and utilization of shallow geothermal energy in this area.