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- Title
Reconstructing the pristine flow of highly developed rivers - a case study on the Chao Phraya River.
- Authors
Adisorn Champathong; Naota Hanasaki; Masashi Kiguchi; Taikan Oki
- Abstract
Understanding the extent to which human activities affect river flow is fundamental for enhancing effective water resources management. In past decades, various methods have been proposed to estimate naturalized flow (i.e. the expected flow if the basin is unaffected by human activities). However, there are still drawbacks to naturalized flow estimation, particularly in a highly regulated basin with incomplete hydrological observation. This study proposes a method for daily naturalized flow development at the key station of the Chao Phraya River Basin; the most highly regulated basin in Thailand. The naturalized flow is estimated by applying the Naturalization with Coarse and Fine Components (NCFC) method to perceive river flow conditions unaffected by human disturbance. The estimation is derived with the integration of five components: (1) observed river flow at the key hydrological station; (2) changes in major reservoir storage; (3) water withdrawal along the river; (4) travel time from major reservoirs to the station; and (5) the filtering technique used by Savitzky- Golay with a three-day window.
- Subjects
THAILAND; WATER storage; STREAMFLOW; HYDROLOGICAL stations; WATER withdrawals; WATER supply; WATERSHEDS
- Publication
Hydrological Research Letters, 2020, Vol 14, Issue 2, p89
- ISSN
1882-3416
- Publication type
Article
- DOI
10.3178/hrl.14.89