Long Term Rainfall Trend of The Brantas Catchment Area, East Java
Spatial and temporal rainfall analyses of the Brantas Catchment Area from 1955 to 2002 based on 40 daily rainfall stations has been performed. To identify the climate pattern for the last five decades, we used the Empirical Orthogonal Function (EOF) followed by the Fast Fourier Transform. By using E...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Universitas Gadjah Mada
2013-07-01
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| Series: | Indonesian Journal of Geography |
| Subjects: | |
| Online Access: | https://jurnal.ugm.ac.id/ijg/article/view/2233 |
| _version_ | 1819076539977826304 |
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| author | Edvin Aldrian Yudha Setiawan Djamil |
| author_facet | Edvin Aldrian Yudha Setiawan Djamil |
| author_sort | Edvin Aldrian |
| collection | DOAJ |
| description | Spatial and temporal rainfall analyses of the Brantas Catchment Area from 1955 to 2002 based on 40 daily rainfall stations has been performed. To identify the climate pattern for the last five decades, we used the Empirical Orthogonal Function (EOF) followed by the Fast Fourier Transform. By using EOF, we found the monsoonal pattern as the most dominant, which explains about 72% of all variances. The interannual pattern shows a negative trend of the monsoonal strength. From the monthly isohyets for each decade, the rainfall amount appears to decrease significantly during the last five decades, indicated by wider low rainfall amount areas and the orographic effect is detected, indicated by always greater amount in highlands. From rainfall data in mountain and coastal areas, dry periods had been increasing, mainly in lowlands. Thus, the continued imbalance of the dry and wet period is one cause of the monsoonal strength decrease during the last five decades. |
| first_indexed | 2024-12-21T18:42:55Z |
| format | Article |
| id | doaj.art-3a057db9e26d4d3c9d03ca0fbf7c3f9d |
| institution | Directory Open Access Journal |
| issn | 0024-9521 2354-9114 |
| language | English |
| last_indexed | 2024-12-21T18:42:55Z |
| publishDate | 2013-07-01 |
| publisher | Universitas Gadjah Mada |
| record_format | Article |
| series | Indonesian Journal of Geography |
| spelling | doaj.art-3a057db9e26d4d3c9d03ca0fbf7c3f9d2022-12-21T18:53:58ZengUniversitas Gadjah MadaIndonesian Journal of Geography0024-95212354-91142013-07-0138110.22146/indo.j.geog,22332047Long Term Rainfall Trend of The Brantas Catchment Area, East JavaEdvin AldrianYudha Setiawan DjamilSpatial and temporal rainfall analyses of the Brantas Catchment Area from 1955 to 2002 based on 40 daily rainfall stations has been performed. To identify the climate pattern for the last five decades, we used the Empirical Orthogonal Function (EOF) followed by the Fast Fourier Transform. By using EOF, we found the monsoonal pattern as the most dominant, which explains about 72% of all variances. The interannual pattern shows a negative trend of the monsoonal strength. From the monthly isohyets for each decade, the rainfall amount appears to decrease significantly during the last five decades, indicated by wider low rainfall amount areas and the orographic effect is detected, indicated by always greater amount in highlands. From rainfall data in mountain and coastal areas, dry periods had been increasing, mainly in lowlands. Thus, the continued imbalance of the dry and wet period is one cause of the monsoonal strength decrease during the last five decades.https://jurnal.ugm.ac.id/ijg/article/view/2233spatial rainfall trend, Brantas, EOF, climate change |
| spellingShingle | Edvin Aldrian Yudha Setiawan Djamil Long Term Rainfall Trend of The Brantas Catchment Area, East Java Indonesian Journal of Geography spatial rainfall trend, Brantas, EOF, climate change |
| title | Long Term Rainfall Trend of The Brantas Catchment Area, East Java |
| title_full | Long Term Rainfall Trend of The Brantas Catchment Area, East Java |
| title_fullStr | Long Term Rainfall Trend of The Brantas Catchment Area, East Java |
| title_full_unstemmed | Long Term Rainfall Trend of The Brantas Catchment Area, East Java |
| title_short | Long Term Rainfall Trend of The Brantas Catchment Area, East Java |
| title_sort | long term rainfall trend of the brantas catchment area east java |
| topic | spatial rainfall trend, Brantas, EOF, climate change |
| url | https://jurnal.ugm.ac.id/ijg/article/view/2233 |
| work_keys_str_mv | AT edvinaldrian longtermrainfalltrendofthebrantascatchmentareaeastjava AT yudhasetiawandjamil longtermrainfalltrendofthebrantascatchmentareaeastjava |