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offices; next, preliminary rough sketches are delineated; then, it will be iden- 
tified in the field, the fault can be understood in more detail in practice, 
the new technique that uses satellite image to solve engineering geological 
problem of water conservancy and electric power is a best method, which can 
achieve greater, faster, better and more economical results. 
Interpretation of geoligic structure in Jiao Cheng County, Shan Xi Pro- 
vinces 
The 1:50,000 scale topographical map is used for the basic map, the 
1:1,000,000, 1:500,000, 1:250,000 scale landsat image and mOre than two hundred 
1330,000 scale aerial photographs are references, the results that are inter- 
preted from landsat image and aerial photograph are delineated on the basic 
map, then 1:50,000 scale geologic structure maps are made, there are more than 
seventy lineaments three times of those from earlier results, 
Three hundred and sixty lineaments are interpreted from satellite image 
in Shan Xi Province, which doubles those from earlier results as interpreted 
from 13500,000 scale conventional geologic structure map. 
The lineaments are used to research the regime of ground water move- 
ment, The nature, rock stratum, shape, uplift, and low lying of lineaments 
are all related to the regime of ground water. The large springs in Shan Xi 
Province, such as? Shen Tou Spring of Shuo County, Jin Ci Spring, etc. are all 
located down stream of the limestone zone with plenty karst water the springs 
apre at the intersected situation of faults, 
(2) The interpretation of geologic structure is also used to research 
The Three Gorge dam site of the Yangtze River, the 1:500,000 scale false co- 
lor composite image was: used, the regional stability of the dam site is good, 
there are no regional large faults, the geologic structure is clear eut, there 
are large faults on the outskivts of the dam site region, only one fault is 
nearer (about 20 km), the new activity phenomena are not seen, 
(3) The satellite imagery and density slicing picture are used to in- 
terpret geologic structure of Pan Jia Kou Reservoir. This reservoir is a wa- 
ter supply work to Tianjin, an aerial remote sensing experiment was carried 
out in 1980, the twin-otter airplane was used to do it, it consisted of the 
multi-spectral photograph and IR color photograph, the range of surveying 
was 500 to 700 km?, there are four teams: geology, Hydrology, depth of water 
and spectrum to collect data in the field, 
(4) Interpretation of geologic structure is also used to investigate 
the site. for Da Tong eleotric power plant, À large fault in Da Tong plant 
Site was avoided as a result of the investigation. 
(5) Interpretation of geologic Structure is also used to investigate 
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