| 引用本文: | 孟春芳,宋孝玉,田珂宁,等.卫河水系新乡段环境流量最小值研究[J].灌溉排水学报,0,():-. |
| mengchunfang,SONG Xiaoyu,TIAN Kening,et al.卫河水系新乡段环境流量最小值研究[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 摘 要：【目的】研究卫河水系新乡段的环境流量最小值，有助于河流生态系统的规划与保护。【方法】将环境流量最小值分为生态需水、水质自净需水和输沙需水三部分。首先采用Tennant法计算生态需水量，采用一维水质模型计算水质自净需水量，根据汛期输送单位泥沙所需水量来计算输沙需水量。其中，计算生态需水量时，Tennant法基于径流突变前的自然水流(1963-1982)。计算水质自净需水量时，鉴于河流的水污染特征存在明显的空间差异，提出通过聚类分析和判别分析识别导致水污染空间变化的显著水质指标。为验证环境流量推荐值的合理性，采用变动范围法（RVA）计算独立的环境流量值与环境流量推荐值进行比较。最后，将环境流量的推荐值与自然水流(1963-1982)的多年平均流量进行比较从而分析环境流量的盈缺状况，并以月为单位评估了环境流量保证率。【结果】结果表明，干流自上而下7个水文站的生态需水量存在较大差异。在污水达标排放情景下，修武站和合河卫站的水质自净需水量分别为0.74 m3/s和5.98 m3/s。各站输沙需水量大致在8月达到最高值，沿程输沙需水量存在较大差异。环境流量的盈缺分析表明，7个水文站中合河卫站、汲县站、刘庄站出现明显缺水。环境流量保证率表现为：7个水文站汛期的保证率均明显低于非汛期。淇门站的保证率最高，合河卫站的保证率最低。【结论】本文研究了卫河水系新乡段的环境流量最小值，可为河流的环境流量管理提供参考，有助于河流生态系统的保护和水资源高效利用。 |
| 关键词: 环境流量；卫河；新乡；Tennant法；一维水质模型 |
| DOI： |
| 分类号:TV214 |
| 基金项目: |
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| The minimum environmental flow of the Xinxiang Section of the Wei River |
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mengchunfang1, SONG Xiaoyu2, TIAN Kening3, LIU Xueyong4, Wang Yu4, GUO Shuxian4, Ye Bingxiao4
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1.henanshengxinxiangshuiwenshuiziyuankanceju;2.State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, Xi’an University of Technology;3.Henan Vocational College ofWater Conservancy and Environment;4.Xinxiang Hydrology and Water Resources Survey Bureau
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| Abstract: |
| Abstract: 【Objective】The objective is study the minimum environmental flow (e-flow) of the Xinxiang Section of the Wei River (XSWR), which is beneficial to the planning and protection of river ecosystem.【Method】The minimum e-flow of the XSWR included three parts: water demand for ecological system, water self-purification and sediment transport. Firstly, the Tennant method was used to calculate the ecological water demand, and a one-dimensional water quality model was used to calculate the water self-purification demand. The sediment transport water demand was calculated according to the amount of water required by transporting unit sediment in the flood season. With computing, the Tennant method was based on natural flow regimes (1963-1982) before runoff mutation. The cluster analysis (CA) and discriminant analysis (DA) were used to identify water quality indicators responsible for spatial variation in water pollution due to the obvious spatial variation of water pollution characteristics. To verify the rationality of the recommended e-flow values, the independent values calculated by the range of variability approach (RVA) were then compared with the recommended e-flow values. Finally, the recommended e-flow values were compared with the average annual flows natural flow (1963-1982) to analyze the surplus and deficiency of the recommended e-flow, and the e-flow guarantee rate was evaluated in monthly units.【Result】 The results showed that there was great difference in the ecological water demand of 7 hydrometric stations along the river. Under the standard situation of sewage discharge, the water self-purification demands of Xiuwu and Hehewei Stations were 0.74 m3/s and 5.98 m3/s, respectively. The sediment transport water demand of each station basically reached the maximum value in August, and there was great difference in the sediment transport water demand of 7 hydrometric stations along the river. The analysis of the surplus and deficit of e-flow showed that Hehewei, and Jixian, and Liuzhuang Stations were markedly short of water. The guarantee rate of environmental flow is as follows: the guarantee rates of 7 hydrometric stations in flood season were obviously lower than that in non-flood season. Qimen station had the highest guarantee rate, and Hehewei station had the lowest guarantee rate.【Conclusion】 This paper studies the minimum e-flow of the XSWR, which can provide a reference for the management of e-flow, and contribute to the ecological protection of the river and the efficient utilization of water resources. |
| Key words: environmental flow; Wei River; Xinxiang; Tennant method; one-dimensional water quality model |
