Historical Change in the Flow Duration Curve for the Upper Nan River Watershed, Northern Thailand
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- TEBAKARI Taichi
- Department of Environmental and Civil Engineering, Toyama Prefectural University
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- DOTANI Kentaro
- Arakawa-karyu River Office, Ministry of Land, Infrastructure, Transport and Tourism
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- KATO Takuma
- Nakano-City Assembly
Bibliographic Information
- Other Title
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- タイ北部ナン川上流域における流況変化
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Abstract
<p> In recent years, large-scale deforestation has increased in Nan Province, northern Thailand, and the impact on the hydrological environment due to deforestation has become a concern. In this study, historical changes in the rainfall duration curve and flow duration curve (FDC) were examined by statistical analysis using hydrological data for a 42-year period (1974- 2015) obtained from the upper Nan River watershed. Daily rainfall did not show any significant increasing trend over the study period. However, low-flow discharge and drought-flow discharge in the FDC both increased significantly. Especially, the drought-flow discharge, from 86 % to 96 % of the annual time flow exceeded (days 314-351), increased with a significance level of 0.001. According to previous research, natural forest decreased by about 41.5 % (from 856,246 to 500,439 ha) and agricultural land increased by about 51.5 % (from 342,997 to 518,257 ha) in Nan Province over a 17-year period (1995-2012). This largescale land-use change is thought to have influenced the change in the FDC.</p>
Journal
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- JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
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JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES 31 (1), 17-24, 2018
THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
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Details 詳細情報について
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- CRID
- 1390282679416913920
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- NII Article ID
- 130006386643
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- NII Book ID
- AN10088049
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- ISSN
- 13492853
- 09151389
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- NDL BIB ID
- 028770954
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed