Research on Ecological Runoff of Taohe River Basin Based on Interannual Runoff Variation
Human activities, especially the construction of large-scale water conservancy projects, have greatly affected the consistency of the runoff, so it is of great significance to carry out the research on ecological runoff of the river basin based on interannual runoff variation. Taking the Taohe River...
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| Main Authors: | , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2020-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2020.02.006 |
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| Summary: | Human activities, especially the construction of large-scale water conservancy projects, have greatly affected the consistency of the runoff, so it is of great significance to carry out the research on ecological runoff of the river basin based on interannual runoff variation. Taking the Taohe River Basin as an example, this paper conducts the change test for the monthly observed runoff at the Minxian station (at the middle reaches of Taohe River) and Lijiacun station (at the lower reaches of Taohe River) from 1950 to 2016 by the Mann-Kendall and sliding t test methods, obtains the minimum and optimal ecological runoff by the monthly minimum method and monthly frequency calculation method, and analyzes the guaranteed conditions of the ecological runoff before and after hydrological variation and the possible effects from the development of river basin. The results shows that: (1)There are significant hydrological variations in annual runoff at the Minxian station and the Lijiacun station, with change points occurring in 1989 and 1991, respectively; (2) The minimum ecological runoff obtained by the monthly minimum method and the optimal ecological runoff obtained by the monthly frequency calculation method can ensure that the river habitat is featured with “good” or above runoff; (3) After the hydrological variation, the guaranteed conditions of the minimum and optimal ecological runoff are worse, especially in the spawning and breeding period of the fish(April to August); (4) There is a significant decrease for the runoff of the current river, and the intensity and impact of human activities will be further increased, so the ecological, economic and social water use should be comprehensively considered based on the condition of Taohe River Basin in the future. Moreover, the research can provide reference for the future development and utilization of the water resources in Taohe River Basin. |
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| ISSN: | 1001-9235 |