ABSTRACT An overall hydromorphological assessment of the middle to lower Guadalquivir River (southern Spain) was conducted using the Morphological Quality Index (MQI) and a novel extension, the Hydro-Morphological Quality Index (HMQI), with the following aims: (1) investigate the morphological problems and (2) describe and test the HMQI on a case study characterized by relevant hydrological alterations related to the presence of dams. The assessment was preceded by a delineation phase of spatial units using the REFORM hydromorphological framework. The MQI results show that “moderate” is the dominant quality class, with some cases falling into the poor class and a few cases with good conditions. The results in terms of the HMQI are slightly worse, given the remarkable hydrological alterations related to the dams, with approximately half of the reaches classified as poor and the remaining half classified as moderate. The main conclusions of this case study are that (1) the methodology is effective in diagnosing hydromorphological problems and in allowing a sound understanding of the responses to pressures (i.e., cause-effect relationships), and (2) the overall evaluation based on HMQI appears to be a useful integration with the MQI, particularly in a case study characterized by a large number of dams.

中文翻译：

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瓜达尔基维尔河中下游（西班牙南部）水文形态条件评估

摘要 使用形态质量指数 (MQI) 和一种新的扩展，即水文形态质量指数 (HMQI)，对瓜达尔基维尔河中下游（西班牙南部）进行了整体水形态学评估，其目的如下：（1）调查形态问题和 (2) 在一个案例研究中描述和测试 HMQI，其特征是与大坝存在相关的相关水文变化。评估之前是使用 REFORM 水形态学框架对空间单元进行描绘的阶段。MQI 结果显示，“中等”是主导质量等级，部分情况属于较差等级，少数情况良好。鉴于与大坝相关的显着水文变化，HMQI 的结果略差，大约一半的河段被归类为差，剩下的一半被归类为中等。本案例研究的主要结论是：(1) 该方法可有效诊断水形态学问题，并能有效理解对压力的反应（即因果关系），以及 (2) 基于 HMQI 的总体评估似乎是与 MQI 的有用集成，特别是在以大量水坝为特征的案例研究中。