North Carolina Division of Water Quality Methodology for Identification of Intermittent and Perennial Streams and Their Origins

Dorney, John R.; Russell, Periann

doi:10.1016/b978-0-12-805091-0.00014-1

Cited by 5 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ordinal degrees to which indicators are observable are weighted numerically (e.g., 3, 2, 1, 0 or 1.5, 1, 0.5, 0) to reflect the potential utility of the indicator for discriminating among flow permanence classes. The numerical values are summed across the indicators, and this total index score is used to assign a flow permanence class based on thresholds between classes [185]. A multimetric index was developed based on the plant, mollusk, and carabid beetle indicator species to predict classes for the inundation duration per year and mean depth of groundwater during the growing season of a German grassed floodplain [119].…”

Section: Assemble Interim Sdammentioning

confidence: 99%

Classifying Streamflow Duration: The Scientific Basis and an Operational Framework for Method Development

Fritz

Nadeau

Kelso

et al. 2020

Water

View full text Add to dashboard Cite

Streamflow duration is used to differentiate reaches into discrete classes (e.g., perennial, intermittent, and ephemeral) for water resource management. Because the depiction of the extent and flow duration of streams via existing maps, remote sensing, and gauging is constrained, field-based tools are needed for use by practitioners and to validate hydrography and modeling advances. Streamflow Duration Assessment Methods (SDAMs) are rapid, reach-scale indices or models that use physical and biological indicators to predict flow duration class. We review the scientific basis for indicators and present conceptual and operational frameworks for SDAM development. Indicators can be responses to or controls of flow duration. Aquatic and terrestrial responses can be integrated into SDAMs, reflecting concurrent increases and decreases along the flow duration gradient. The conceptual framework for data-driven SDAM development shows interrelationships among the key components: study reaches, hydrologic data, and indicators. We present a generalized operational framework for SDAM development that integrates the data-driven components through five process steps: preparation, data collection, data analysis, evaluation, and implementation. We highlight priorities for the advancement of SDAMs, including expansion of gauging of nonperennial reaches, use of citizen science data, adjusting for stressor gradients, and statistical and monitoring advances to improve indicator effectiveness.

show abstract

Section: Assemble Interim Sdammentioning

confidence: 99%

Classifying Streamflow Duration: The Scientific Basis and an Operational Framework for Method Development

Fritz

Nadeau

Kelso

et al. 2020

Water

View full text Add to dashboard Cite

show abstract

“…We identified eight flow duration methods for temperate regions, two of which cover portions of the AW: the SDAM for the Pacific Northwest (the PNW method [ 27 ]), and the New Mexico method (the NM method [ 34 ]). Other methods that were identified covered arid regions in other parts of the world (e.g., Mediterranean Europe [ 53 , 54 ]), or non-arid portions of the United States (e.g., North Carolina [ 52 ], Ohio [ 55 ], Kentucky [ 56 ], Oregon [ 51 ], and temperate portions of the United States [ 57 ]; the Oregon method was a predecessor to the PNW method). From these methods, as well as the scientific literature, 12 geomorphological, 14 hydrological, and 15 biological candidate indicators were identified.…”

Section: Resultsmentioning

confidence: 99%

“…Single indicators can supersede model classifications of Ephemeral or Need more information to At least intermittent . Single indicators provide technical benefits (i.e., improved accuracy), as well as non-technical benefits (such as greater acceptance of the SDAM, given public understanding of the role of streamflow duration in supporting wildlife), which is why they are used in most other SDAMs (e.g., [ 27 , 34 , 51 , 52 ]). We evaluated the following potential single indicators, based on recommendations from the RSC:…”

Section: Methodsmentioning

confidence: 99%

Implementing an Operational Framework to Develop a Streamflow Duration Assessment Method: A Case Study from the Arid West United States

Mazor

Topping

Nadeau

et al. 2021

Water

View full text Add to dashboard Cite

Streamflow duration information underpins many management decisions. However, hydrologic data are rarely available where needed. Rapid streamflow duration assessment methods (SDAMs) classify reaches based on indicators that are measured in a single brief visit. We evaluated a proposed framework for developing SDAMs to develop an SDAM for the Arid West United States that can classify reaches as perennial, intermittent, or ephemeral. We identified 41 candidate biological, geomorphological, and hydrological indicators of streamflow duration in a literature review, evaluated them for a number of desirable criteria (e.g., defensibility and consistency), and measured 21 of them at 89 reaches with known flow durations. We selected metrics for the SDAM based on their ability to discriminate among flow duration classes in analyses of variance, as well as their importance in a random forest model to predict streamflow duration. This approach resulted in a “beta” SDAM that uses five biological indicators. It could discriminate between ephemeral and non-ephemeral reaches with 81% accuracy, but only 56% accuracy when distinguishing 3 classes. A final method will be developed following expanded data collection. This Arid West study demonstrates the effectiveness of our approach and paves the way for more efficient development of scientifically informed SDAMs.

show abstract

Assessing discharge periodicity in mountain catchments using classified environmental conditions (Tatra Mountains, Poland)

Borowska-Pakuła

Mięsiak-Wójcik

2021

J. Mt. Sci.

View full text Add to dashboard Cite

The periodicity of a river expressed in cycles of various lengths (monthly, seasonal, multiannual) is a result of climatic factors and overlapping environmental conditions within its catchment. In uncontrolled or poorly surveyed catchments, it is very difficult to determine the duration of a stream’s hydrological activity. This is especially relevant for catchments with complicated water circulation in karstic rocks. The present study concerns the small catchment of the Strązyski Potok river located in the area of the Tatra National Park, in the Western Tatras. The observation period covered the 2015 hydrological year, which differed hydrologically from average conditions. This study aims to develop a simple method to explain the processes shaping the mountain stream discharge periodicity. The research employed periodic field observations linked with climatic and non-climatic factors. Environmental conditions were assessed as four classes reflecting their influence on appearance or disappearance of mountain stream water. Class boundaries were the values of quartiles. The degree of correspondence between environmental factors and stream field observations was described via the Index DC (Degree Correspondence Index) approach. Complete correspondence (Index DC =0) was found in 23% catchments, a weak relationship between conditions favouring discharge and actual condition (Index DC= -1, +1) was noted within 11 catchments, while in 9 catchments, no such relationship was found (Index DC = -2, +2). The obtained results indicate a correspondence or lack thereof between the environmental potential of the catchment and its discharge periodicity. The discrepancies between the assessment of the influence of climatic and non-climatic factors and the data collected during field observations provide a basis for more detailed studies. Continuation of these studies based on the proposed classifications will allow for a more complete explanation of water disappearance in river channels and the determination of their short- and long-term discharge periodicity.

show abstract

North Carolina Division of Water Quality Methodology for Identification of Intermittent and Perennial Streams and Their Origins

Cited by 5 publications

References 4 publications

Classifying Streamflow Duration: The Scientific Basis and an Operational Framework for Method Development

Classifying Streamflow Duration: The Scientific Basis and an Operational Framework for Method Development

Implementing an Operational Framework to Develop a Streamflow Duration Assessment Method: A Case Study from the Arid West United States

Assessing discharge periodicity in mountain catchments using classified environmental conditions (Tatra Mountains, Poland)

Contact Info

Product

Resources

About