Awass, Adane Abebe: Hydrological drought analysis- occurrence, severity, risks : the case of Wabi Shebele River Basin, Ethiopia. 2009
Inhalt
- Declaration of Authorship
- Acknowledgements
- Abstract
- Contents
- List of Figures
- List of Tables
- Acronyms and Abbreviations
- 1 Introduction
- 1.1 Background and Statement of the Problem
- 1.2 Research Objective
- 1.3 Scope of the Study
- 1.4 Conceptual Framework of the Research
- 1.5 Organization of the Thesis
- 2 Description of Study Area and Data
- 2.1 General Physiographic Condition
- 2.1.1 Location, Coverage
- 2.1.2 Topographic Features
- 2.1.3 Geologic Features
- 2.1.4 Land Use/Land Cover
- 2.1.5 Soils
- 2.2 Hydro Climatic Conditions
- 2.3 Socio-economics
- 3 Characterising Hydrological Drought
- 3.1 Background
- 3.2 Genesis of the Process
- 3.3 Drought Indices
- 3.3.1 Standardized Precipitation Index
- 3.3.2 Normalized Difference Vegetation Index
- 3.3.3 Palmer Drought Severity Index
- 3.3.4 Surface Water Supply Index
- 3.3.5 Multivariate Aggregate Drought Index
- 3.4 Hydrologic Drought Event Definition
- 4 Hydrologically Homogeneous Drought Pools
- 4.1 Catchment Characteristics as Predictors of Base Flow Index
- 4.2 Pooled Estimates of Low Flow Quantiles
- 4.3 Pattern Recognition
- 4.4 Formation of Homogeneous Pools at Basin Scale
- 5 Spatial Patterns of Hydrological Drought
- 5.1 Background
- 5.2 Data and Methodology
- 5.3 Area Coverage of Recent Worst Droughts
- 5.4 Severity-area-frequency
- 6 Paleohydrology
- 7 Stochastic Simulation of Severity of Drought
- 7.1 Trends of Drought
- 7.2 Background
- 7.3 Data and Methodology
- 7.4 Results and Discussion
- 7.5 Conclusion
- 8 Double Chain Markov Model
- 8.1 Background
- 8.2 Homogeneous Markov Model
- 8.3 Non-homogeneous Markov Model
- 8.4 Hidden Markov Model (HMM)
- 8.5 Double Chain Markov Model (DCMM)
- 9 Prediction of Risks of Hydrological Drought
- 9.1 Support Vector Machines
- 9.2 Copula Modelling
- 9.2.1 Families of Copulas
- 9.2.2 Identification of Copulas
- 9.2.3 Fitting Copulas to Hydrological Drought Variables
- 9.2.4 Results and Discussion
- 9.2.5 Conclusion
- 9.3 Drought Risks
- 10 Summaries and Conclusions
- References
- A Appendix 1
- B Appendix 2
- C Appendix 3
- Glossary
- Index