Dissertation > Excellent graduate degree dissertation topics show

Study on Risk Analysis and Assessment of Hillslope Debris Flow

Author: JiangQingFeng
Tutor: XuGang
School: Southwest China Normal
Course: Physical Geography
Keywords: Hillslope Debris Flow Hazard Vulnerability Risk Beibei of Chongqing
CLC: P642.23
Type: Master's thesis
Year: 2002
Downloads: 493
Quote: 15
Read: Download Dissertation

Abstract


Hillslope debris flow is developed in hillslope, which is small-scale and without clear circulation area, and whose ditch slope and hillslope have nearly same slope. Debris flow’s risk is decided by the hazard of debris flow and the vulnerability of affected object. Taking Beibei of Chongqing as example, the paper discusses problems about risk assessment of hillslope debris flow. The paper includes seven parts:Part One introduces simply general situation of Beibei of Chongqing, and expounds the conception of risk assessment of hillslope debris flow.Part Two analyses the condition (the source of material and water, terrain etc.) in the process of forming hillslope debris flow, and summaries the common regular of distribution of hillslope debris flow.In Part Three, according to the viewpoint of system, giving consideration to all kinds of condition of forming hillslope debris flow, taking five indexes as follow :the shape index of ditch, the mean value of greatest precipitation within 24 hours, the developing degree of unstable mass, the mean depth of loose ’accumulated clay and the rate of plant cover ,applying fuzzy mathematics, the paper designs a suit of scheme about judging hillslope data. The result indicates the scheme’s rate of distinguish is 84.6%.Part Four is the hazard assessment of hillslope debris flow .Because the hazard of hillslope debris flow mainly is pounding, the former formula (Hazard = Magnitude X Probability)can’t assess accurately the hazard of hillslope debris flow. Applying the law of conservation of energy, we improved the formula as : Hazard = Energy X Probability,and examined it on the basis of concrete example. The result indicates the relative value of hazard on the basis of improved formula can embody accurately the pound-destroy effect of hillslope debris flow. It conforms to reality.Part Five discusses preliminary vulnerability of hillslope debris flow. The vulnerability is composed by two parts. One part is the chance that affected object is destroyed .It is decided by affected object’s place, terrace condition and the distribution of affected objects. The other part is the degree of difficulty that affected objects is destroyed by debris flow .It is related with affected objects’ type, structure and condition. So we get the formula of vulnerability assessment.Part Six is the calculation of risk. Taking the results of Part Foul; and Part Five into the formula: Risk = Hazard X Vulnerability .It calculates the risk of every debris flow ditch.Part Seven is conclusion and discussion.

Related Dissertations

  1. Research and Analysis of Postcholecystectomy Diarrhoea (PCD) in Chronic Calculous Cholecystitis,R657.4
  2. Research on Dam-Break Probability Analysis Method for Dangerous Reservoir,TV697
  3. Key Technologies of Dam-break Life Loss Risk Assessment Research,TV122.4
  4. The Studies and Establishment of Ready-mixed Concrete Information-guided Price on the Basis of Risk Analysis,F407.92
  5. Study on Development Risk Analysis and Management of Urban Commercial Residence,F293.35
  6. Financing Behaviors of Sina Microblogging in View of Risks,F49
  7. The Study on Risk Evaluation of BOT Projects in China University,G647
  8. GIS of Baoshan City, land and ecological environment vulnerability assessment,X826
  9. Health Risk Assessment of a Brownfield Contaminated by Volatile Chlorinated Hydrocarbons and Study on Screening of Remediation Technique,X820.4
  10. Health-based and Ecological Risk Assessment of Contaminated Sites,X820.4
  11. Assessment of Resistance Risk in Spodoptera Exigua (Hubner) and Spodoptera Litura (Lepidoptera: Noctuidae) to Chlorantraniliprole,S433
  12. Distribution and Bioavaiability of Polycyclic Aromatic Hydrocarbons in Soil Particle-size Separates,X131.3
  13. The Empirical Research of the Important Factors of the Financial Risks of Chinese A-share Construction Enterprises Market,F426.92
  14. Drought Risk Analysis of Dazhen Irrigated Area,S423
  15. Monitoring of Insecticide Resistance, Resistance Risk Assessment and Biochemical Mechanism for Buprofezin in Nilaparvata Lugens(St(?)l),S435.112.3
  16. The Prediction of Potential Suitable Distributions and Risk Assessment of the Alien Invasive Plant Flaveria Bidentis(L.) in China,S451
  17. Research on Relationship between Different TCM Dialectical Type and Associate with Sex Hormones and Risk Factors of Cardiovascular Disease in Perimenopausal Women of Hypertension,R259
  18. Study on Application of HACCP in Strawberry Juice Processing,TS255.44
  19. Study on the Application of Hazard Analysis and Critical Control Point System (HACCP) in Ice Cream and Related Products Processing,TS277
  20. The Heavy Metals Distribution Characteristics and Risky Evaluations of Farmland Soils-Crops Around Different Types of Chemical Industrial Park,X833
  21. Environmental Lead Exposure Among Preschool Children in Hefei, China: Blood Lead Level and Risk Factors,R179

CLC: > Astronomy,Earth Sciences > Geology > Hydrogeology and Engineering Geology > Engineering Geology > The geological and engineering geological > Debris flow
© 2012 www.DissertationTopic.Net  Mobile