Phosphorus in the river corridor
Phosphorus in the river corridor
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DOI：
10.1016/j.earscirev.2016.04.010
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发表时间：
2016-07
影响因子：
12.1
通讯作者：
R. Records;E. Wohl;M. Arabi
中科院分区：
文献类型：
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作者：
R. Records;E. Wohl;M. Arabi
政府机构和非政府组织已采取河流走廊保护措施，试图控制河流的非点源营养负荷。然而，在国家基础上开发的河流走廊保护和建模策略可能无法完全解释已被证明是河流走廊中磷的重要控制因素的动态。这些来源的不确定性可能有经济和环境成本，但我们知道没有以前的作品，提出了一个广泛的概念模型，磷在河流走廊的动态。本文在现有研究的基础上，通过以下几个方面建立了自然条件下河流廊道中磷的概念模型：（1）评价不同景观特征和河流网络中不同段（例如，在狭窄的渠道与宽谷）;和（ii）确定是否有一些过程和控制一般更占主导地位的一些景观类型和河流河段。最后，我们提供了一个概念模型的应用实例，并确定了未来研究的关键领域。审查表明，磷动态在河流走廊，及其控制，可能会有很大的不同，在不同的景观类型和河流河段。然而，这里概述的概念模型说明了景观类型的某些特征，以及磷和活性化合物的丰度，运输和转化，可能有助于预测重要的河流走廊磷动态。使用这个概念模型可以更好地为磷动态和河流廊道管理的数值模拟提供信息。
River corridor protection has been adopted by government agencies and non-governmental organizations to try to control nonpoint nutrient loading to rivers. Yet, river corridor protection and modeling strategies developed on a national basis may not fully account for dynamics that have proven to be important controls on phosphorus in river corridors. These sources of uncertainty may have economic and environmental costs, yet we know of no previous works that have proposed a broad conceptual model of phosphorus dynamics in river corridors. In this review, we develop a conceptual model of phosphorus in the river corridor under natural conditions based on existing research by: (i) evaluating how processes and controls vary among distinct landscape characteristics and among distinct segments within river networks (e.g., in confined channels versus wide valleys); and (ii) determining whether some processes and controls are generally more dominant for some landscape types and river reaches. Finally, we provide an example application of the conceptual model, and identify key areas for future research. The review suggests that phosphorus dynamics in the river corridor, and their controls, may vary substantially across different landscape types and river reaches. However, the conceptual model outlined here illustrates how certain characteristics of landscape type, and abundance, transport, and transformation of phosphorus and reactive compounds, may help to predict important river corridor phosphorus dynamics. Use of this conceptual model can better inform numerical modeling of phosphorus dynamics and management of river corridors.