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中文摘要：
受气候变化与人类活动的影响,水文序列的一致性发生变异,原有生态径流过程的水文学推求方法等受到严重挑战。针对水文变异条件下生态径流过程推求所遇到的一致性缺失和流量0值处理问题,提出变异点识别与水文频率法、生态水深流速法相结合的处理思路,解决水文序列不一致和流量0值过多情况下的生态流量过程推估问题。研究以提取变异点位置为基础,依据干扰强度划定不同水文变异阶段,并应用水文频率法与生态水深流速法相结合分阶段对文峪河水库坝址处生态径流过程进行计算,再以天然序列推估的生态流量过程为衡量依据,对天然径流序列、人类弱扰动序列以及强扰动序列的生态保证率进行统计,揭示河流生态水文的演变规律与过程。
英文摘要：
Under the impact of climate change and human activities, hydrological sequence has undergone some changes and its consistency broken. Many existing hydrologic methods for environmental flow analysis are facing a great challenge by this. This paper presents a combined approach of mutation point identification, hydrologic frequency method, and hydraulic method of ecological water depth and velocity, focusing on solution of the problems of broken consistency and zero flow in hydrological sequence. In this approach, first the locations of extracted mutation points were obtained and different stages of hydrological variation were delimited according to these locations and the interference degree of human activities. Then, the hydrologic data in the stages that were taken separatedly as a natural sequence, near natural sequence, and human-disturbance hydrological sequence, were used to determine their minimum flows and suitable flow ranges for river ecological health. Finally, the environmental flows at the dam-site of the Wenyu river reservoir under natural conditions were obtained with the hydrology frequency method and hydraulic method. And based on these runoffs, ecological guarantee rates were calculated for different stages. The results provide a developing trend of the eco-hydrological system of the Wenyu river. Key words： hydrology and water resources; environmental flow process; hydrological variations; hydrological frequency method; human activities interference
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