Expanding the applications of the standardized streamflow index through regionalization

IF 2.6 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Elliot S. Anderson, Keith E. Schilling
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引用次数: 0

Abstract

The Standardized Streamflow Index (SSI) has frequently been used to quantify drought by comparing periods of streamflow against a river's historical values. This study expands upon previous SSI methodologies by creating a more flexible, regionalized version of the metric for Iowa, a Midwestern state located in the central United States. Five drought regions were developed for Iowa that largely correspond to the state's Major Land Resource Areas. Several United States Geological Survey gauges were identified within each drought region and streamflow data were used to calculate daily water yields from 1960 to the present. SSI values calculated for both individual river sites and the entire drought region provide insights into the relative dryness of Iowa watersheds over the past several decades. The SSI methodology can be used to evaluate river dryness with limited data records and water yields of specific streams can be compared to each other and across the overall region. This study demonstrates the potential for developing versions of the SSI that enable real-time calculations at a daily scale at locations with limited historical streamflow data. The new SSI metric may be a valuable tool for decision-makers as state and federal agencies continue to identify and manage drought.

Abstract Image

通过区域化扩大标准化溪流指数的应用范围
标准化河川流量指数(SSI)经常被用于通过比较不同时期的河川流量与河流的历史值来量化干旱。本研究在以往 SSI 方法的基础上进行了扩展,为位于美国中部的中西部爱荷华州创建了一个更加灵活、区域化的指标版本。为爱荷华州开发了五个干旱区域,与该州的主要土地资源区基本对应。在每个干旱区域内都确定了几个美国地质调查局的测量点,并使用溪流数据计算了从 1960 年至今的日产水量。通过计算单个河流地点和整个干旱地区的 SSI 值,可以深入了解爱荷华流域在过去几十年中的相对干旱程度。SSI 方法可用于在数据记录有限的情况下评估河流的干旱程度,并可将特定河流的产水量与整个地区的产水量进行比较。这项研究证明了开发 SSI 版本的潜力,可以在历史溪流数据有限的地点按日进行实时计算。随着各州和联邦机构继续识别和管理干旱,新的 SSI 指标可能会成为决策者的宝贵工具。
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来源期刊
Journal of The American Water Resources Association
Journal of The American Water Resources Association 环境科学-地球科学综合
CiteScore
4.10
自引率
12.50%
发文量
100
审稿时长
3 months
期刊介绍: JAWRA seeks to be the preeminent scholarly publication on multidisciplinary water resources issues. JAWRA papers present ideas derived from multiple disciplines woven together to give insight into a critical water issue, or are based primarily upon a single discipline with important applications to other disciplines. Papers often cover the topics of recent AWRA conferences such as riparian ecology, geographic information systems, adaptive management, and water policy. JAWRA authors present work within their disciplinary fields to a broader audience. Our Associate Editors and reviewers reflect this diversity to ensure a knowledgeable and fair review of a broad range of topics. We particularly encourage submissions of papers which impart a ''take home message'' our readers can use.
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