Open Access
Ordinary High Flows and the Stage-Discharge Relationship in the Arid West Region
TLDR
In this paper, the authors provide an analysis of how gage data may be utilized in determining the Ordinary High Water Mark (OHWM) on ephemeral and intermittent streams in the Arid West using the physical features of the channel.Abstract:
: The Ordinary High Water Mark (OHWM) defines the lateral extent of non-wetland waters and is regulated as Waters of the United States under Sec. 404 of the Clean Water Act. Previous research has developed a reliable and repeatable methodology for identifying the OHWM on ephemeral and intermittent streams in the Arid West using the physical features of the channel (Lichvar and McColley 2008, Curtis and Lichvar 2010). This study expands upon the previous reports by providing an analysis of how gage data may be utilized in OHW determinations. We clarify the methodology for using gage data, review the potential errors encountered in developing a stage discharge relationship, compare the position of the gage-predicted OHWM to the field OHW signature, and determine the recurrence interval and flow duration of OHW events. The field OHW signature often is not associated with a 2-year flood event like many assume, but ranges from 1- to 15.5-year flood event. This large variation in recurrence intervals for the field OHWMs makes it impossible to define the frequency of the ordinary high flow from gage data because the OHW event is unique to each channel.read more
Citations
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Journal ArticleDOI
An ecohydrological stream type classification of intermittent and ephemeral streams in the southwestern United States
Lainie R. Levick,Samantha Hammer,Russell Lyon,Joel Murray,Amy N. Birtwistle,Phillip Guertin,David C. Goodrich,Brian P. Bledsoe,Melinda Laituri +8 more
TL;DR: In this article, an ecohydrological stream type classification was developed to improve decision making for ephemeral and intermittent streams at four military reservations in the southwestern U.S: Fort Irwin, Yuma Proving Ground (YPG), Fort Huachuca and Fort Bliss.
ReportDOI
Use of LiDAR to assist in delineating waters of the United States, including wetlands
TL;DR: In this paper, LiDAR data or products are used to view the Ordinary High Water Mark (OHWM) signature across a project area and to estimate the height and location of two primary OHWM indicators: changes in vegetation and breaks in slope.
ReportDOI
Channel classification across arid west landscapes in support of OHW delineation
TL;DR: In this paper, a simple, artificial channel classification to evaluate OHW indicators was devised to better understand watershed and intermittent and ephemeral channels across the landscape in the Arid West region.
ReportDOI
Occurrence and Distribution of Ordinary High Water Mark (OHWM) Indicators in Non-Perennial Streams in the Western Mountains, Valleys, and Coast Region of the United States
TL;DR: In this article, the authors explored the occurrence and distribution of ordinary high water mark (OHWM) indicators in non-perennial streams in the Western Mountains, Valleys, and Coast (WMVC) Region of the United States.
Survey of OHWM indicator distribution patterns across Arid West landscapes
TL;DR: In this paper, the authors evaluated the frequency and occurrence of OHWM indicators to understand their distribution patterns across the Arid West region in 14 mountain, 18 foothill, and 17 basin ephemeral and intermittent channels within multiple watersheds.
References
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