Title Page
Contents
Abstract 13
Chapter 1. Introduction 16
1.1. Research Background 16
1.2. Research purposes 19
Chapter 2. Previous Study 20
2.1. Study to calculate drought index 20
2.2. Calculation method by major drought index 27
2.2.1. SPI 27
2.2.2. GEVI 29
2.2.3. SPEI 31
2.3. Correlation Analysis Method of Drought Index 36
2.3.1. Pearson's Correlation Coefficient 36
2.3.2. Spearman Correlation Coefficient 36
Chapter 3. Evaluation of Domestic Applicability of Drought Index 38
3.1. Study Area 38
3.2. Result of drought index calculation 39
3.2.1. SPI 39
3.2.2. GEVI 44
3.2.3. SPEI 49
3.3. Drought Index Comparison 54
3.3.1. Comparison of Drought Days by Drought Indices by Drought Depth 54
3.3.2. Correlation Analysis of Drought Index by Pearson correlation coefficient 58
3.3.3. Comparative analysis of drought index calculation results by region 60
3.3.4. Comparison of analysis results of SPI, GEVI and SPEI 63
3.3.5. Long-term drought in six regions 81
3.4. Correlation Analysis of Each City in Korea 94
Chapter 4. Evaluation of Applicability of Drought Index in China 99
4.1. Study Area 99
4.2. Result of drought index calculation 101
4.2.1. SPI 101
4.2.2. GEVI 108
4.2.3. SPEI 114
4.3. Comparative analysis by drought index 120
4.3.1. Comparison of Drought Days by Drought Indices and Drought Depth 120
4.3.2. Correlation Analysis of Drought Index by Pearson correlation coefficient 125
4.3.3. Beijing 128
4.3.4. Guangzhou 136
4.3.5. Shanghai 146
4.3.6. Chongqing 151
4.3.7. Urumuqi 156
4.3.8. Shenyang 159
4.3.9. Wuhan 163
4.3.10. Yulin 166
4.4. Correlation Analysis of Each City in China 173
4.4.1. Correlation Analysis of Cities in China under SPI 173
4.4.2. Correlation Analysis of Cities in China under GEVI 178
4.4.3. Correlation Analysis of Cities in China under SPEI 180
Chapter 5. Predicting Future Drought Conditions in the RCP4.5 Scenario 183
5.1. Study Area 183
5.2. Results of Korea Drought Index 183
5.2.1. SPI 183
5.2.2. GEVI 186
5.2.3. SPEI 188
5.3. Results of China RCP4.5 Drought Index 190
5.3.1. SPI 190
5.3.2. GEVI 192
5.3.3. SPEI calculation results 194
5.4. Future drought prospects in Korea 196
5.5. China's future drought prospects 206
Chapter 6. Conclusions 217
References 220
국문초록 227
Table 2.1. Drought Classification by Values of Drought Index 35
Table 3.1. Rainfall monitoring records for 6 stations 39
Table 3.2. Ratio of drought occurrence period to total observation... 43
Table 3.3. Ratio of drought occurrence period to total observation... 47
Table 3.4. Ratio of drought occurrence period to total observation... 52
Table 3.5. Pearson correlation coefficient 58
Table 3.6. Spearman corelation coefficient 59
Table 3.7. Seoul (1970-2017) February SPI and GEVI calculation results 60
Table 3.8. Correlation Analysis of Citiesin China under SPI 94
Table 3.9. Correlation Analysis of Citiesin China under GEVI 95
Table 3.10. Correlation Analysis of Citiesin China under SPEI 96
Table 4.1. Rainfall monitoring records for 8 stations 100
Table 4.2. Percentage of drought occurrences as a percentage of total... 106
Table 4.3. Percentage of drought occurrences as a percentage of total... 113
Table 4.4. Percentage of drought occurrences as a percentage of total... 119
Table 4.5. Correlation Analysis by Drought Index(Pearson correlation... 126
Table 4.6. Correlation Analysis by Drought Index(Spearman correlation... 127
Table 4.7. Correlation Analysis of Cities in China under SPI 173
Table 4.8. Correlation Analysis of Cities in China under GEVI 178
Table 4.9. Correlation Analysis of Cities in China under SPEI 180
Figure 3.1. Location of the six observatories used 38
Figure 3.2. SPI results at six cities 40
Figure 3.3. GEVI results at six cities 47
Figure 3.4. SPEI results at six cities 52
Figure 3.5. Comparison of SPI, GEVI and SPEI Days of Drought in Korea 57
Figure 3.6. Long-term drought evaluation in Gangneung and Daejeon 64
Figure 3.7. Seoul annual precipitation and yearly average temperature 67
Figure 3.8. Gwangju annual precipitation and yearly average... 68
Figure 3.9. Comparison of drought in Seoul and Gwangju 70
Figure 3.10. Busan annual precipitation and yearly average temperature 72
Figure 3.11. Deajeon annual precipitation and yearly average temperature 73
Figure 3.12. Comparison of drought in Busan and Deajeon 75
Figure 3.13. Gangneung annual precipitation and yearly average... 76
Figure 3.14. Deagu annual precipitation and yearly average temperature 77
Figure 3.15. Comparison of drought in Gangneung and Daegu 79
Figure 3.16. Korea dought frequency probability SPI-12 81
Figure 3.17. Korea cumulative frequency of drought SPI-12 81
Figure 3.18. Korea dought frequency probability GEVI-12 82
Figure 3.19. Korea cumulative frequency of drought GEVI-12 82
Figure 3.20. Korea dought frequency probability SPEI-12 83
Figure 3.21. Korea cumulative frequency of drought SPEI-12 83
Figure 3.22. Comparison of drought index calculation results by... 90
Figure 3.23. Comparison of drought index calculation results by... 91
Figure 3.24. Comparison of drought index calculation results by site(SPEI) 92
Figure 3.25. Correlation Analysis of Citiesin China under SPI 94
Figure 3.26. Correlation Analysis of Cities in China under GEVI 95
Figure 3.27. Correlation Analysis of Cities in China under SPEI 96
Figure 4.1. Location of the eight observatories used 99
Figure 4.2. SPI results at eight cities 105
Figure 4.3. GEVI results at eight cities 112
Figure 4.4. SPEI results at eight cities 118
Figure 4.5. Comparison of SPI, GEVI and SPEI Days of Drought in China 124
Figure 4.6. Beijing annual precipitation and yearly average temperature 130
Figure 4.7. Guangzhou annual precipitation and yearly average... 138
Figure 4.8. Short and long-term drought contrast between Beijing and... 144
Figure 4.9. Shanghai annual precipitation and yearly average temperature 147
Figure 4.10. Chongqing annual precipitation and yearly average... 151
Figure 4.11. Short-term(Above) and long-term(below) drought comparison... 154
Figure 4.12. Urumuqi annual precipitation and yearly average temperature 156
Figure 4.13. Shenyang annual precipitation and yearly average temperature... 160
Figure 4.14. Short-term and long-term drought comparison between... 162
Figure 4.15. Wuhan annual precipitation and yearly average temperature 164
Figure 4.16. Yulin annual precipitation and yearly average temperature 166
Figure 4.17. long-term drought comparison between Beijing and Shanghai 169
Figure 4.18. long-term drought comparison between Wuhan and Chongqing 170
Figure 4.19. long-term drought comparison between Beijing and Yulin 171
Figure 4.20. Correlation Analysis of Cities in China under SPI 173
Figure 4.21. Correlation Analysis of Cities in China under GEVI 178
Figure 4.22. Correlation Analysis of Cities in China under SPEI 180
Figure 5.1. SPI results at six cities 185
Figure 5.2. GEVI results at six cities 187
Figure 5.3. SPEI results at six cities 189
Figure 5.4. SPI results at six cities 191
Figure 5.5. GEVI results at six cities 193
Figure 5.6. SPEI results at six cities 195
Figure 5.7. Comparison of past and future long-term drought conditions in... 197
Figure 5.8. Comparison of past and future long-term drought conditions in... 199
Figure 5.9. Comparison of past and future long-term drought conditions in... 201
Figure 5.10. Comparison of past and future long-term drought conditions in... 207
Figure 5.11. Comparison of past and future long-term drought conditions in... 209
Figure 5.12. Comparison of past and future long-term drought conditions in... 211