从河流中取水是农业的关键资源,工业,和发电。然而,为了维持河流生态系统,退出不应超过一定的门槛,通常要求在河里留下一定量的水,通过环境流量评估(EFA)程序进行评估。尽管这项任务至关重要,很少或没有国际标准来评估EF的最小值。相反,提供了一般准则,带有很大的主观性。这里,专注于昆比河的案例研究,在苏门答腊,印度尼西亚,我们将多标准方法应用于全民教育程序,在先前的研究中测试用水文方法评估的EF值,专注于相关的目标物种,即鱼TorSoro.基于二维水力模型,我们探索了6个指标,涵盖了一些最重要的标准,以确保鱼类动物的福利。指标二,称重可用体积,稍微修改了众所周知的方法PHABSIM。指标三.IIIII确保目标物种福利所需的目标水深,而标准IIV-VI目标流速,和沉淀物去除。使用此处显示的多个指标,尽管仍然是主观的,可以提供更一致的EF值,甚至从几个标准给出的流量要求的差异来看。在这里我们发现IV(流速)下的最大估计EF,是II的流量估计值的两倍多。但总的来说,根据水文标准进行的初始EF估算似乎与拟议的标准相反。我们的研究是涵盖印度尼西亚EF的少数研究之一,也是唯一一个关于昆比河的,我们的结果令人感兴趣,也作为该地区其他全民教育研究的基准。
Water withdrawal from rivers is a key resource for agriculture, industry, and power generation. However, in order to maintain riverine ecosystem, withdrawal should not exceed certain thresholds, and normally a requirement is made that a certain amount of water be left in the river, to be assessed via Environmental Flow Assessment (EFA) procedure. In spite of the crucial importance of this task, little or no international standard exists to assess minimum values of the EF. Rather, general guidelines are provided, with large subjectivity entailed. Here, focusing on the
case study Kumbih river, in Sumatra, Indonesia, we apply a multiple criteria approach to EFA procedure, testing the values of EF assessed with hydrological methods in a previous study, with a focus on a relevant target species, i.e. the fish Tor Soro. Based upon a two-dimensional hydraulic model, we explore 6 indicators, covering some most important criteria to ensure the welfare of the fish fauna. Indicator II, weighed usable volume, slightly modifies the well-known method PHABSIM. Indicators IIi.IIIII target water depth needed to ensure welfare of target species, whereas criteria IIV-VI target flow velocity, and sediment removal. Use of multiple indicators as shown here, albeit still subjective, may provide more consistent values of EF, and even an outlook of the disparity in terms of flow requirements given by the several criteria. Here we found that the maximum estimated EF under IV (flow velocity), is over twice as large as the flow estimate from II. Overall however, initial EF estimates from the hydrological criterion seem adequate against the criteria proposed. Our study is among the few covering EF for Indonesia, and the only one regarding Kumbih river, and our results are of interest, also as a benchmark for other EFA studies in the region.