Attenuation of P,S and coda waves in Longtan reservoir region

Longtan reservoir with high dam and high storage capacity lies in the east-north area of Yunnan-Guizhou plateau.

The relationships among Urease Activity(UA), Phosphatase Activity(PA) and parameters of water quality in the aquatic ecosystem of Heilongtan Reservoir have been studied.

Based on the study and analysis of the activity characters of reservoir-induced earthquake, this paper analyzes the effective way of emergency management and decision for reservoir-induced earthquake, through which we can decrease economic loss and social disaster as great as possible.

On the basis of reference [1], through the analyses of rock media, geological structures, tectonic stress field and seismic active characteristics in the reservoir area and nearby, it is considered that the geological ambiance of reservoir-induced earthquake in Xiaowan area is complicated.

The case study on reservoir earthquakes home and abroad and in the Three Gorges projection and its vicinity shows that the generation, place and intensity of the induced earthquake are affected and controlled by geological environment.

With accumulation of experience and unceasing progress of science and technology, the re search on reservoir earthquake prediction gradually enters the stage of "model mechanism re search-quantative estimation" from the previous "phenomenal description-qua1itative esti mation ".