海螺沟生态旅游景区地质环境评价

海螺沟作为国家级风景区，其地表生态现象和生态过程与其地质环境演变有着密切关系，加之近年来西部大开发中人类活动在沟内陡然增长，人为致灾陆续发生。在实地调查的基础上，对该沟的地质环境状况进行了较翔实的评价，分析了孕育这些人－地互馈演变作用的独特地质背景，为下一步的合理开发提出了可行的防治对策。调查表明，沟内的地质环境问题主要包括雪（冰）崩、融冻、岩土体蠕滑、崩塌、滑坡、泥石流、水土流失和地震等。分析认为导致这些灾害问题的主要作用包括五个方面，即强烈的新构造抬升运动、复杂的地质构造体系、冰川作用显著、强降水丰沛以及人类活动不当等。最后针对海螺沟开发提出了加强地质环境保护和整治的建议，对一号营地进行稳定性评价，二号营地进行崩塌与泥石流整治和热泉水开发，三号营地进行泥石流沟建设。

Assessment of Geoenvironment and Its Countermeasure in Hailuogou Valley

In Hailuogou, a famous landscape, there is a close relationship between the ecological phenomenon and the evolvement of geological environment. Many natural hazards or unnatural disasters happened because of the rapid growth of population in this region. The authors carefully evaluated the geological environment, and analyzed the particular geology characters in this region. As a result, a series of prevention measures of disasters are brought forward for the further development of the region. According to the field investigation, the main geological problems included snow avalanche, glacier avalanche, frost bursting, creeping slip of rock and soil, falling, landslide, debris flow, soil erosion and earthquake, and the reasons for these problems can be concluded as following: (1) the upward risen of the neo tectonic movement is very strong. (2) the geological structure system is quite complex. (3) the effect of glacierization is rather clear. (4) the heavy precipitated water often happens. (5) human activities are very frequent. At last, for protection of the geological environment in the area, the authors raise three pieces of advice. First, evaluate the stability of the slope in section 1.Second, control of falling and debris flows and exploit thermal springs in section 2. Last, plan a channel for the drainage of debris flow in section 3.