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Comprehensive Evaluation of geological hazard , Qingdao

Author: ChenHui
Tutor: SuiYuZhu
School: Qingdao University
Course: Environmental Science
Keywords: Qingdao Province Risk assessment Fuzzy mathematics Geological hazard
CLC: P694
Type: Master's thesis
Year: 2011
Downloads: 96
Quote: 0
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Abstract


Qingdao, one of the fourteenth coastal open city in China, is an important economic center and coaster city of the country. Then increasing economic development and human activities on coastal areas have contributed to environmental problems and various geological disasters, which’s frequency has the growth trend year by year. The environmental problems have become the people’s focus.The text has illustrated the basic law of space-time distribution about geological disaster in Qingdao. The background, distribution law and influence factors of Collapse, Landslide, Mud-rock flow and Seawater intrusion are also discussed in detail. Discover that the main factor of bringing out this district geological calamity is human activities and heavy rainfall. Because of economic growth, human activities aggravating and the process of large scale projects, the rock denudation rate become exacerbated, superadded to heavy rainfall effect, more and more geological disaster occur.Therefore, assessment on geological disaster in Qingdao has been made quantification in the means of fuzziness synthesis estimation, which quantifies the factors that influence geological disasters. It divides into historical disaster intensity index and potential disaster intensity index. According to how severely the influence degree two index affect disaster, using Analytic Hierarchy Process constitute a comprehensive analysis of the geological disaster mathematical model. The estimator agent is the main geological disaster, such as Collapse, Landslide, Mud-rock flow and Seawater intrusion. Based on comprehensive assessment, there is 4.8% severe danger area 21.8% moderate area and 43.4% safe area. The result indicates that in general there is no danger area and the severe danger is on a low level in most areas in Qingdao. But the risk of geological disaster can’t be ignored, because the severe danger area is in low mountains and hills, which has big slope angle, and the rock upper the hill is exposed and little plant. If heavy rainfall, the disaster may has occurred.

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CLC: > Astronomy,Earth Sciences > Geology > Disaster geology
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