Change Analysis of Karst Landforms, Hydrogeological Conditions and Effects of Tunnel Excavation on Groundwater Environment in Three Topography Grades in China
نویسندگان
چکیده
One-third of the Earth in China is formed by Karst topography, which exposes different landforms three topography grades from southeast to northwest, corresponding below several hundred meters for first grade, one two thousand second and more than 4000 m Qinghai-Tibet Plateau. Through hydrochemical D-18O stable isotopes 64 water samples collected along railway lines fractal characteristics typical areas grades, changes development degree, groundwater activities, influence tunnel excavation effects on environment were analyzed. The results indicated that: (1) degree are somehow similar while there significant differences between slopes area third grade area. (2) In detail, relatively weaker flow seeping weaken influences excavation, including distribution pattern resources, field, circulation, elevation has little room rise. (3) There many large faults north-southward direction transportation eastern-western will inevitably encounter them. intersection area, great environment. (4) lighter hydrogen oxygen enriched indicating that recharge source presents obvious effect.
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ژورنال
عنوان ژورنال: Water
سال: 2023
ISSN: ['2073-4441']
DOI: https://doi.org/10.3390/w15010207