Low Flow Duration Frequency Relationships of Selected Catchments in the Blue Nile Basin
Low flow extremes are natural phenomena that have amplitudes lower than the average low flow on a river basin brought about by severe droughts that hamper sustainable development in the basin (e.g. agricultural damage, water supply shortage). The study aimed to establish a probabilistic picture of e...
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| Format: | Article |
| Language: | English |
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Philippine Association of Institutions for Research, Inc.
2016-01-01
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| Series: | JPAIR |
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| Online Access: | https://philair.ph/index.php/jpair/article/view/350 |
| _version_ | 1811266990863548416 |
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| author | Jeremy Mondejar Patrick Willems |
| author_facet | Jeremy Mondejar Patrick Willems |
| author_sort | Jeremy Mondejar |
| collection | DOAJ |
| description | Low flow extremes are natural phenomena that have amplitudes lower than the average low flow on a river basin brought about by severe droughts that hamper sustainable development in the basin (e.g. agricultural damage, water supply shortage). The study aimed to establish a probabilistic picture of extreme Low flow-Duration-Frequency (QDF) relationships in the Blue Nile basin. A 3-arc seconds (approximately 90m at the equator) digital elevation model (DEM) that covers the Blue Nile basin from CGIAR-CSI SRTM 90m database were downloaded and used in the delineations. The distribution parameters and aggregation levels were calibrated in a combined manner in deriving the QDF relationships accounting for their return period. Hence, the QDF relationship comprises the multi-duration and multi-frequency characterisation of observed extreme values. The amplitude of low flow discharge in Blue Nile basin is phenomenally varying with catchment area, hence, accurate and representative design of QDF curves should be created in order to prevent over and under estimation of design discharge values. Low-flow-duration-frequency models represent the watershed drought regime which can be used to predetermine low-flow characteristics of a catchment. The QDF models developed in this study can be a useful tool in terms of amount and duration of water abstraction during dry period in an area. |
| first_indexed | 2024-04-12T20:53:19Z |
| format | Article |
| id | doaj.art-29e8d0ce82da44938d8504609075acf2 |
| institution | Directory Open Access Journal |
| issn | 2012-3981 2244-0445 |
| language | English |
| last_indexed | 2024-04-12T20:53:19Z |
| publishDate | 2016-01-01 |
| publisher | Philippine Association of Institutions for Research, Inc. |
| record_format | Article |
| series | JPAIR |
| spelling | doaj.art-29e8d0ce82da44938d8504609075acf22022-12-22T03:17:03ZengPhilippine Association of Institutions for Research, Inc.JPAIR2012-39812244-04452016-01-01231183510.7719/jpair.v23i1.350327Low Flow Duration Frequency Relationships of Selected Catchments in the Blue Nile BasinJeremy Mondejar0Patrick Willems1CTU-Barili CampusKatholieke Universiteit LeuvenLow flow extremes are natural phenomena that have amplitudes lower than the average low flow on a river basin brought about by severe droughts that hamper sustainable development in the basin (e.g. agricultural damage, water supply shortage). The study aimed to establish a probabilistic picture of extreme Low flow-Duration-Frequency (QDF) relationships in the Blue Nile basin. A 3-arc seconds (approximately 90m at the equator) digital elevation model (DEM) that covers the Blue Nile basin from CGIAR-CSI SRTM 90m database were downloaded and used in the delineations. The distribution parameters and aggregation levels were calibrated in a combined manner in deriving the QDF relationships accounting for their return period. Hence, the QDF relationship comprises the multi-duration and multi-frequency characterisation of observed extreme values. The amplitude of low flow discharge in Blue Nile basin is phenomenally varying with catchment area, hence, accurate and representative design of QDF curves should be created in order to prevent over and under estimation of design discharge values. Low-flow-duration-frequency models represent the watershed drought regime which can be used to predetermine low-flow characteristics of a catchment. The QDF models developed in this study can be a useful tool in terms of amount and duration of water abstraction during dry period in an area.https://philair.ph/index.php/jpair/article/view/350hydrologylow flow extremesqdfblue nile basinexperimental designcebuphilippines |
| spellingShingle | Jeremy Mondejar Patrick Willems Low Flow Duration Frequency Relationships of Selected Catchments in the Blue Nile Basin JPAIR hydrology low flow extremes qdf blue nile basin experimental design cebu philippines |
| title | Low Flow Duration Frequency Relationships of Selected Catchments in the Blue Nile Basin |
| title_full | Low Flow Duration Frequency Relationships of Selected Catchments in the Blue Nile Basin |
| title_fullStr | Low Flow Duration Frequency Relationships of Selected Catchments in the Blue Nile Basin |
| title_full_unstemmed | Low Flow Duration Frequency Relationships of Selected Catchments in the Blue Nile Basin |
| title_short | Low Flow Duration Frequency Relationships of Selected Catchments in the Blue Nile Basin |
| title_sort | low flow duration frequency relationships of selected catchments in the blue nile basin |
| topic | hydrology low flow extremes qdf blue nile basin experimental design cebu philippines |
| url | https://philair.ph/index.php/jpair/article/view/350 |
| work_keys_str_mv | AT jeremymondejar lowflowdurationfrequencyrelationshipsofselectedcatchmentsinthebluenilebasin AT patrickwillems lowflowdurationfrequencyrelationshipsofselectedcatchmentsinthebluenilebasin |