关山地区水文地质及工程地质条件复杂，地下水类型以基岩裂隙水和断层构造裂隙水为主。

The geological, hydrogeological and engineering geological conditions are complicated in Guan Mountain region, with the ground water mainly as the rock and tectonic crevice water.

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其特殊的岩性构造特征决定坝区地下水埋藏特征为裂隙水。

The embed feature of ground water is flaw-water with the special trait of rock-conformation.

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关山隧道在掘进过程中，围岩裂隙带和构造破碎带相互串通导致基岩裂隙水向隧道内渗漏，引起山体泉水干涸，对其周边地区生态环境产生影响。

During the tunnel digging, crevice water seeped into the tunnel and resulted in the dry-up of the springs, thus affecting the ecological environment of the mountain region.

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