| water conservancy project is a kind of huge investment and benifit, but after having an accident , can cause the special project of seriousness disaster. Its structural, boundary condition and the complexity that runs environment are designed , are under construction to run the experience of defending , uncertainty and the extensiveness that is concerned with content , can affect the safety of large dams ,so, inspection and detection work get generally to pay attention. Monitor project major have: distortion ﹑stress ﹑ an emergency of seep press and seep flow ﹑water conservancy study prototype anddynamical detection etc.. Detection method have: geological radar, surface wave and the electrical resistance rate of high density. The adopting electrical method of this paper and the data that gets from inspection turn over to develop result contrast, verify finally with isotope method, complete the understanding for the form of large dams. According to the mechanism of forming vaduse field ,to have stated the influence of physics inspecting leakage by inversion calculation under the different mthematics model, and obtain the optimized solution of inversion calculation .meanwhile geo-Exploration measurement check the original underground water geo-model firistly, then the thesis carries out the inversion calculation of tendency vadose field . The solution indicates that the vadose water of the measuring from each case. .The solution provides the disposal of the dam with a lot of reasonable basis.To discuss the relationship between displacement stress and seepage field,when they reach couple ,then means the one of sign that seepage reaches the stabilization , summarizing accord with active calculation model. Check out first from these means that underground water is composed to store the geological model space, then from seepage parameter to perform inversion, According to reservoir, check leakage in explore method effect it , find specificly seepage position comparatively accurately. So for shot-off of loss project, offer reliable design basis to ensure the safety of reservoir to transport battalion. This paper is taking xiao-shan power station as analysis example , applies above-mentioned theory to turn over to develop calculation, According to the result of isotope tracer measurement and two-year original data of measure weir , osmometer and piezometer , taking advantage of the software package of eo6 menu inversion calculation , applying saturation—non-saturation method of finite difference integration , the thesis carries out the inversion calculation of tridementional vadose field in xiao shan hydropower station under four different conditions , and obtain the optimized solution of inversion calculation . The solution indicates that the vadose water of the measuring weir behind xiao shan hydropower station dam mainly comes from basalt and the unconformity of basalt and asdesite . The solution provides the disposal of the dam with a lot of -amount basis data.on the inversion result to sum up following concluion : 1 , measure water weir behind dam seep running water to come from basalt layer mainly, basalt layer inversion water penetration develop above10-3~10-4cm/s, even reaching , especially 650 m, 670 m above basalt district, water penetration scope of 10-1~10-21 cm/s. 2 measure water weir behind dam seep running water come from two bank hillside mainly, since a series of develop inversion calculation result , two bank hillside seeps water to measure taking dam rear water weir seeps rate of flow minimum also have 55%( the group of 2th), reach 82.9%( the group of 4th). 3 measure water weir after dam seep running water to come from right bank hillside mainly, since a series of develop inversion calculation result , in the right dam hillside seep running water to measure is one time when left hillside seeps water to measure at least in dam, biggest ,to reach 4 times around. After seeping running water to take dam , measure the proportion that water weir see...
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