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汉江丹江口水库由汉江、丹江两个库段组成.在丹库的峡谷灰岩地带,断裂、节理发育,利于水的渗透和循环.1967年11月蓄水后,随水位的变化,地震活动增加,几年来由 M_s<2.5上升到 M_s=4.7,并在丹库的峡谷附近形成北北西方向延伸的三个地震密集区.地震频度、强度与水位(库容)变化有一定的相关性.蓄水后地壳形变明显,并讨论了形变应力分布特征及诱发机制.
The Hanjiang Danjiangkou Reservoir is composed of two reservoir sections, the Hanjiang River and the Danjiang River. In the limestone canyon of Dancu, faults and joints develop, which are conducive to the infiltration and circulation of water. After the impoundment in November 1967, with the change of water level, the seismic activity , Increasing from M_s <2.5 to M_s = 4.7 in several years and forming three seismic-intensive areas extending north and west along Dan Canyon’s canyon.The frequency and intensity of earthquakes have some correlation with the change of water level (storage capacity). The crustal deformation is obvious after impoundment, and the distribution of deformation stress and its mechanism are discussed.