Abstract：
With the accelerated development of urbanization, rivers in urban areas have become the most closely synergized water ecosystem between human activities and natural processes. To achieve the restoration goal of using hydrological regime change-ecological response relationship to advance the sustainable development of regulated river ecosystems, this study collected ecohydrological data at four tributaries of the Wei River system (Ba, Chan, Feng, and Hei Rivers) at a total of 24 stations in October 2020 and June 2021. Taking ecological flow as hydrological parameter and zooplankton as indicator organism, combined with habitat data scored on-site, the indicator system of zooplankton index of biological integrity and comprehensive habitat quality index was established to explore the hydrological-ecological response relationship in a multi-dimensional way. The results showed that during the ebb stage, the ecological health of the Feng River was better overall, with an average ecological flow value of 267.09 ± 348.62. The ecological health of the Hei River was the worst, with an average ecological flow value of 37.80 ± 38.80. During the abundant water period, the ecological health of the Chan River was optimal with an average ecological flow value of 189.25 ± 190.10, while the ecological health of the Hei River remained unimproved, but the average ecological flow value increased by 283.12 ± 197.76. There was a clear negative correlation relationship between the comprehensive habitat quality index and ecological flow. The correlation between zooplankton index of biological integrity and ecological flows is extremely strong and threshold values exist, but there is strong heterogeneity in the interaction of disturbance factors across water systems, which may not provide a predictable response to flow changes. This study aims to provide a case reference for flow management in watersheds that also lack long-time series hydrological data and to contribute new thinking to the wide application of the hydrological-ecological response relationship.
摘要：
随着城市化进程的加快,城市地区的河流已成为人类活动与自然过程之间最紧密协同的水生态系统。为实现利用水文变化-生态响应关系推进受调节河流生态系统可持续发展的恢复目标,本研究收集了渭河系统四个支流的生态水文数据(Ba，Chan,冯,和黑河）在2020年10月和2021年6月共24个车站。以生态流量为水文参数，浮游动物为指示生物，结合现场评分的栖息地数据，建立浮游动物生物完整性指数和综合生境质量指数指标体系，以多维方式探索水文生态响应关系。结果表明，在退潮阶段，丰河生态健康总体较好，平均生态流量值为267.09±348.62。黑河的生态健康状况最差,平均生态流量值为37.80±38.80。在丰水期,禅河的生态健康状况最佳，平均生态流量值为189.25±190.10，而黑河的生态健康状况仍未得到改善，但平均生态流量值增加了283.12±197.76。综合生境质量指数与生态流量之间存在明显的负相关关系。浮游动物生物完整性指数与生态流量的相关性极强,存在阈值,但是水系统中干扰因素的相互作用存在很强的异质性，这可能无法对流量变化提供可预测的响应。本研究旨在为同时缺乏长期序列水文数据的流域流量管理提供案例参考，为水文-生态响应关系的广泛应用贡献新思路。
