| Study of long-term variation and potential of available surface water resources of Jinghui Canal Head |
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| DOI：10.7606/j.issn.1000-7601.2018.06.35 |
| Key Words: surface water resources annual runoffs available water resources ecological flow usable runoffs potential Jinghui Canal Irrigation District |
| Author Name | Affiliation | | LIU Zhao | Institute of Water and Development, Chang’an University, Xi’an, Shannxi 710054, China
Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Chang’an University, Xi’an, Shannxi 710054, China | | LI Qiang | Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Chang’an University, Xi’an, Shannxi 710054, China | | LI Lu-lu | Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Chang’an University, Xi’an, Shannxi 710054, China | | MAO Quan-nian | The Administration Bureau of Jinghui Canal Irrigation Area, Sanyuan, Shaanxi 713800, China | | JIA Zhi-feng | Institute of Water and Development, Chang’an University, Xi’an, Shannxi 710054, China
Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Chang’an University, Xi’an, Shannxi 710054, China |
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| Abstract: |
| Based on long series of hydrological data of Jinghui Canal head on Jinghe River, the runoff, the water demand in dry season, and the unusable runoff in flood season were analyzed using moving average, regression, statistic and Tenant methods. The average annual usable runoffs and potentially usable runoffs of the Jinghe River were further discussed. The results showed that the annual runoff of Jinghe River decreased apparently from 1.72 billion m3 in the 60’s of last century to less than 1.00 billion m3 now and the observed minimum runoff departure was almost -29.6%. The average annual usable runoff was about 50% to 60% of the total runoff. Both of the average annual usable runoff and the potential usable runoff were increased with the improvement of sediment limitation for the irrigation and its canal system. According to the runoff situation and its trend of the Jinghe River, there are still 166 to 210 million m3 of runoff, which are potential available for the Jinghui Canal Irrigation Area. |
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