Development of a general river regime index (RRI) for intra-annual flow variation based on the unit river concept and flow variation end-points
Development of a general river regime index (RRI) for intra-annual flow variation based on the unit river concept and flow variation end-points
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DOI：
10.1016/j.jhydrol.2013.08.041
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发表时间：
2013-10-30
影响因子：
6.4
通讯作者：
Klove, Bjorn
中科院分区：
文献类型：
--
作者：
Haghighi, Ali Torabi;Klove, Bjorn
人们已经制定了不同的指数来对河流进行分类并评估土地利用和气候变化对河流的影响。这些方法并不通用，但往往取决于气候等当地条件。本文提出了一个通用的无量纲指数，用于研究河流水情变化的影响。首先提出了单位河流和月河势点（MRRP）的概念，然后将河势指数（RRI）定义为MRRP的总和。 RRI 是河流年内水流状况的衡量标准，范围从完全均匀（RRI = 0）到短暂或干涸（RRI = 1200）。尼罗河及其支流的数据被用来说明 RRI 的好处和用途。选择尼罗河是因为它是一条长河，其支流流经不同的气候带。事实证明，RRI 对气候和过量降雨的年度分布很敏感，在自然条件下，尼罗河的降雨量从上游到下游逐渐减少。湖泊、湿地和水坝的影响得到了清晰的展示。 RRI 可用于对河流进行分类并研究气候、基流和河流调节变化的影响。它也可用作环境流量分配的工具。 (C) 2013 Elsevier B.V. 保留所有权利。
Different indices have been developed to classify rivers and assess land use and climate change impacts on rivers. These methods are not universal, but tend to depend on local conditions such as climate. This paper presents a general, dimensionless index for studying the impacts of hydrological changes in river regimes. The concept of the unit river and monthly river regime point (MRRP) is developed first and then the river regime index (RRI) is defined as the sum of MRRPs. RRI is a measure of the intra-annual flow regime of rivers ranging from completely uniform (RRI = 0) to ephemeral or dry (RRI = 1200). Data on the river Nile and its tributaries were used to illustrate the benefit and use of the RRI. The Nile was chosen as it is a long river with tributaries flowing though different climate zones. The RRI proved to be sensitive to climate and the annual distribution of excess rainfall, which decreases from upstream to downstream for the Nile in natural conditions. The impacts of lakes, wetlands and dams were clearly demonstrated. The RRI can be used to classify rivers and to study the impacts of changes in climate, base flow and river regulation. It is also useful as a tool for environmental flow allocation. (C) 2013 Elsevier B.V. All rights reserved.