Comparative study on appropriate drought and flood index selection in a tropical farming island in China
The traditional drought and flood analysis method had not fully considered the proportion analysis of different drought and flood grades in the historical years of each rainfall station. This made results unconvincing and made it difficult to deeply understand the characteristics and applicability o...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2023-01-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.1066828/full |
| _version_ | 1797950723196977152 |
|---|---|
| author | Yi Zou Lirong Zhu Yanhu He Youwen Lin Xu Liang Changqing Ye Changqing Ye |
| author_facet | Yi Zou Lirong Zhu Yanhu He Youwen Lin Xu Liang Changqing Ye Changqing Ye |
| author_sort | Yi Zou |
| collection | DOAJ |
| description | The traditional drought and flood analysis method had not fully considered the proportion analysis of different drought and flood grades in the historical years of each rainfall station. This made results unconvincing and made it difficult to deeply understand the characteristics and applicability of various methods. Based on the daily rainfall data of 88 stations in Hainan Island from 1970 to 2019, the China-Z index and the Standardized Precipitation Index (SPI) were used to compare and analyze the spatial and temporal distribution characteristics of droughts and floods from three different time scales (flood season, non-flood season and the whole year). The results showed that both SPI and China-Z index can well reflect the actual drought and flood situations in Hainan Island. The analysis of the proportions of different drought and flood grades in the historical years of each rainfall station and regional historical drought and flood statistics suggested that the China-Z index had a better indication effect than SPI on the extreme drought and flood grades. The alternation of drought and flood between different eras were obvious. Hainan Island generally presented an east-west reverse drought-flood variation trend, as well as a north-south reverse drought-flood variation trend. The drought and flood in the central mountainous area of Hainan Island had been relatively stable. The distribution pattern of drought and flood had a good spatial consistency in the three periods. On the whole, Hainan Island had shown a trend of flood in the east and drought in the west in the past 50 years. |
| first_indexed | 2024-04-10T22:19:39Z |
| format | Article |
| id | doaj.art-475a6aa7107e4d15a1a9ea027277df77 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-10T22:19:39Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-475a6aa7107e4d15a1a9ea027277df772023-01-18T04:30:58ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-01-011010.3389/feart.2022.10668281066828Comparative study on appropriate drought and flood index selection in a tropical farming island in ChinaYi Zou0Lirong Zhu1Yanhu He2Youwen Lin3Xu Liang4Changqing Ye5Changqing Ye6College of Ecology and Environment, Hainan University, Haikou, ChinaSchool of Tourism, Hainan University, Haikou, ChinaInstitute of Environmental and Ecological Engineering, Guangdong Technology University, Guangzhou, ChinaHainan Hydrology and Water Resources Survey Bureau, Haikou, ChinaCollege of Ecology and Environment, Hainan University, Haikou, ChinaCollege of Ecology and Environment, Hainan University, Haikou, ChinaKey Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Haikou, ChinaThe traditional drought and flood analysis method had not fully considered the proportion analysis of different drought and flood grades in the historical years of each rainfall station. This made results unconvincing and made it difficult to deeply understand the characteristics and applicability of various methods. Based on the daily rainfall data of 88 stations in Hainan Island from 1970 to 2019, the China-Z index and the Standardized Precipitation Index (SPI) were used to compare and analyze the spatial and temporal distribution characteristics of droughts and floods from three different time scales (flood season, non-flood season and the whole year). The results showed that both SPI and China-Z index can well reflect the actual drought and flood situations in Hainan Island. The analysis of the proportions of different drought and flood grades in the historical years of each rainfall station and regional historical drought and flood statistics suggested that the China-Z index had a better indication effect than SPI on the extreme drought and flood grades. The alternation of drought and flood between different eras were obvious. Hainan Island generally presented an east-west reverse drought-flood variation trend, as well as a north-south reverse drought-flood variation trend. The drought and flood in the central mountainous area of Hainan Island had been relatively stable. The distribution pattern of drought and flood had a good spatial consistency in the three periods. On the whole, Hainan Island had shown a trend of flood in the east and drought in the west in the past 50 years.https://www.frontiersin.org/articles/10.3389/feart.2022.1066828/fulldroughts and floodsHainan IslandChina-Z indexStandardized precipitation indexempirical orthogonal function analysisspatial and temporal distribution pattern |
| spellingShingle | Yi Zou Lirong Zhu Yanhu He Youwen Lin Xu Liang Changqing Ye Changqing Ye Comparative study on appropriate drought and flood index selection in a tropical farming island in China Frontiers in Earth Science droughts and floods Hainan Island China-Z index Standardized precipitation index empirical orthogonal function analysis spatial and temporal distribution pattern |
| title | Comparative study on appropriate drought and flood index selection in a tropical farming island in China |
| title_full | Comparative study on appropriate drought and flood index selection in a tropical farming island in China |
| title_fullStr | Comparative study on appropriate drought and flood index selection in a tropical farming island in China |
| title_full_unstemmed | Comparative study on appropriate drought and flood index selection in a tropical farming island in China |
| title_short | Comparative study on appropriate drought and flood index selection in a tropical farming island in China |
| title_sort | comparative study on appropriate drought and flood index selection in a tropical farming island in china |
| topic | droughts and floods Hainan Island China-Z index Standardized precipitation index empirical orthogonal function analysis spatial and temporal distribution pattern |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.1066828/full |
| work_keys_str_mv | AT yizou comparativestudyonappropriatedroughtandfloodindexselectioninatropicalfarmingislandinchina AT lirongzhu comparativestudyonappropriatedroughtandfloodindexselectioninatropicalfarmingislandinchina AT yanhuhe comparativestudyonappropriatedroughtandfloodindexselectioninatropicalfarmingislandinchina AT youwenlin comparativestudyonappropriatedroughtandfloodindexselectioninatropicalfarmingislandinchina AT xuliang comparativestudyonappropriatedroughtandfloodindexselectioninatropicalfarmingislandinchina AT changqingye comparativestudyonappropriatedroughtandfloodindexselectioninatropicalfarmingislandinchina AT changqingye comparativestudyonappropriatedroughtandfloodindexselectioninatropicalfarmingislandinchina |