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A Review of Stream Assessment Methodologies and Restoration: The Case of Virginia, USA
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ABSTRACT

Rapid population growth and land use changes have severely degraded streams across the United States. In response, there has been a surge in the number of stream restoration projects, including stream restoration for mitigation purposes. Currently, most projects do not include evaluation and monitoring, which are critical in the success of stream restoration projects. The goal of this study is to review the current status of assessment methodologies and restoration approaches for streams in Virginia, with the aim of assisting the restoration community in making sound decisions. As part of the study, stream restoration projects data from a project in Fairfax County,Virginia was assessed. This review revealed that the stream assessment methodologies currently applied to restoration are visuallybased and do not include biological data collection and/or a method to incorporate watershed information. It was found from the case study that out of the twenty nine restoration projects that had occurred between 1995 and 2003 in Fairfax County, nineteen projects reported bank stabilization as a goal or the only goal, indicating an emphasis on a single physical component rather than on the overall ecological integrity of streams. It also turned out that only seven projects conducted any level of monitoring as part of the restoration,confirming the lack of evaluation and monitoring. However, Fairfax County has recently improved its stream restoration practices by developing and incorporating watershed management plans. This now provides one of the better cases that might be looked upon by stakeholders when planning future stream restoration projects.


KEYWORD
Biological integrity , Stream assessment , Stream monitoring , Stream restoration , Success criteria , Watershed management
  • 1. Introduction

    Streams provide economic, social, cultural and environmental values to society [1, 2]. These values however, have been compromised due to rapid population growth and land use changes that have led to a decrease in forests and wetlands and an increase in impervious surfaces such as roads and buildings. Land use changes impact streams’ physical, chemical, and biological processes by altering stream flows and increasing the streams’sediment loads [3-6]. These factors can lead to a decline in the stream quality [7, 8].

    Stream restoration as a discipline has developed primarily as a result of wetland permitting processes requiring in-kind replacement of degraded or “impacted” streams [9]. In 1996, the Army Corps of Engineers (COE) issued Nationwide Permit 26(now expired) which was at the time the only permit that addressed the improvement of impacted streams [10]. In 2002, all Nationwide Permits were reissued, and Nationwide Permit 27 was modified to address not only permits for wetland and riparian restoration but also stream restoration activities [10]. Under Section 404 of the Clean Water Act and Section 10 of the Rivers and Harbors Act of 1899, the COE is authorized to approve activities in the waters of the United States and directed to protect the nation’s aquatic resources. Perhaps due to the link between COE permitting and stream restoration, physical stream restoration practices often focus on meeting the permit requirements and not on the long-term ecological viability of the streams [9].In addition, as part of the permitting process for stream restoration projects, the COE, Norfolk District and the Virginia Department of Environmental Quality (DEQ) have developed stream assessment methodologies to determine the required level of mitigation.

    A stream restoration project which is designed to improve a reach of stream independent from a development project is known as a ‘voluntary restoration.’ A stream restoration project which is designed to offset the impacts to a stream from a development project is known as ‘stream mitigation’ [11]. Successful voluntary restoration projects should result in ecological net gains, whereas stream mitigation projects should result in no net loss of ecological conditions [11]. While stream restoration holds the promise of improving the stream quality, restoring a stream to its pre-disturbed state may not be possible as a result of widespread watershed changes [7, 12]. Moreover, the limited knowledge of the complexity and dynamics of streams has led to a lack of sound benchmarks for measuring the outcomes of stream restoration [13]. The restoration community still lacks a set of agreed success criteria of the kind which are needed for stream evaluation and monitoring. To ensure that the manipulation of streams leads to improved stream conditions in the future,lessons learned from current and future projects should be gathered and shared with the community.

    This paper reviews several important components of stream restoration through a literary review and a case study. The goal of this study is to provide the stream restoration community and the public policy sector with an informational foundation for understanding and making sound decisions about stream restoration.

    2. Materials and Methods

    This paper reviews the available literature on stream restoration assessment methodologies, classification systems, biological integrity, success criteria, monitoring, evaluation and adaptive management. This information is primarily from Virginia,but also from across the United States. Northern Virginia (Fig.1) was selected as the case study area due to the recent efforts of the city of Reston, in Fairfax County and of Fairfax and Arlington Counties in the development and use of watershed management plans to address stream improvements. Data on 25 stream restoration projects in the study area of Fairfax County was collected from the National River Restoration Science Synthesis (NRRSS)database [14]. Data was obtained on a further four stream restoration projects through interviews with project managers. The authors participated in a stream assessment training session to learn to the best way to apply the assessment methodologies discussed in this paper. Personal and phone interviews were held with 24 individuals employed by federal, state and local governments, community associations, environmental consultants,non-governmental organizations and academics.

    3. Reviews

       3.1. Stream Assessment Methodologies

    Stream assessment methodologies have been developed for use with the current permit system, watershed and land use planning, water quality and stream habitat reporting and stream restoration. A recent study [15] analyzed more than 50 final and draft regulatory and non-regulatory stream assessment and mitigation methodologies applicable at a national or state level. The study included two methodologies developed for Virginia, the Stream Attributes Analysis: Impact and Mitigation Assessment(SAA) and the Fairfax County Stream Physical Assessment Protocols(Table 1). The COE in Norfolk District developed the SAA to rapidly review projects that impact upon perennial or intermittent streams and therefore require permits in accordance with Section 404 of the Clean Water Act. The SAA methodology scores six variables: riparian condition, watershed development, channel incision, bank erosion, channelization and in-stream habitat.Each variable is then assigned a numeric value ranging from 0 (poor) to 1.0 (excellent) [15].

    In Virginia, the interaction between the COE, Norfolk District and the DEQ produced several methodologies for evaluating stream conditions. In late 2003, the COE and Norfolk District,in collaboration with the DEQ, released a revised version of the SAA called the Stream Attributes and Crediting Methodology:Impact and Compensation Reaches (SACM). This document was revised and released as the Stream Attributes Assessment Methodology(SAAM) in 2005 (Table 1). The SACM, which excluded watershed development as a variable, was modeled on the EPA Rapid Bioassessment Protocols [16] and was designed to determine overall stream condition and the necessary mitigation in the Piedmont physiographic region [17]. The DEQ has also developed a methodology, the Stream Impact Compensation Assessment Methodology (SICAM). This is used to determine the overall stream condition and the need for stream restoration

    [Table 1.] History of the development of a stream assessment protocol in Virginia

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    History of the development of a stream assessment protocol in Virginia

    rangprojects across the State [18]. In 2006, the DEQ, the COE and Norfolk District encouraged the use of both methodologies and informed the public of the conditions under which these methodologies should be used. Then, in mid 2006, the DEQ, the COE and Norfolk District reversed their course and entered into discussions to work towards the development of the Unified Stream Methodology (USM). A final draft of the USM was released for public comment on January 18, 2007 (Table 1).

    3.1.1. SAAM and SICAM field application

    In the spring of 2006, the authors participated in a stream assessment training session to learn how best to apply the SAAM and SICAM methodologies in the field. The team assessed a site located in Loudoun County, Virginia, consisting of eight streams and 17 stream reaches totaling 2,183.4 linear meters before any environmental impact had occurred. The stream reaches were classified by stream type, with ten intermittent streams, six perennial streams and one stream for which the upstream section was classified as intermittent and the downstream section as perennial. In addition, the stream reaches were classified by the stream order, with thirteen 1st order and four 2nd order streams[19]. Observations for each variable were logged in the field and later entered into forms. For the SAAM, each variable is evaluated and rated on a numerical scale, ranging from zero to ten for two variables and from zero to eleven for three variables. In both cases the highest value is the most favorable condition for each stream reach [16]. For the SICAM, each variable is evaluated and rated on a qualitative scale from severe to optimal (Table 2).

    The application of the SAAM and SICAM methodologies varies.Firstly, the SAAM field form is an electronic spreadsheet based on Microsoft Excel and includes the calculations necessary to determine the Reach Condition Index (RCI), which is an

    [Table 2.] Comparison of the Stream Attribute Assessment Methodology (SAAM) Stream Impact Compensation Assessment Manual (SICAM)and Unified Stream Methodology (USM) Variables and Scoring

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    Comparison of the Stream Attribute Assessment Methodology (SAAM) Stream Impact Compensation Assessment Manual (SICAM)and Unified Stream Methodology (USM) Variables and Scoring

    overall numeric indicator for the stream [17]. The evaluator only needs to enter the data collected into the spreadsheet, with each stream reach requiring its own form and being scored separately.For example, one stream reach (86.1 linear meters) observed during the field study scored a pre-impact RCI of 5.02. Because this stream will be impacted, a restoration project in the same watershed must be identified as a proposed stream for the mitigation.The mitigation stream must also be assessed to determine its RCI and then the proposed mitigation plan is applied to the SAAM to determine the new RCI for the stream post-restoration.The difference between these two RCI values is known as the mitigation lift RCI. To determine the linear meters of restoration required, the RCI of the impacted stream, in this case 5.02, is divided by the mitigation lift RCI and then multiplied by the linear meters of impact, in this case 86.1 linear meters. The number of linear meters calculated represents the number of linear meters of restoration required for the 86.1 linear meters of impact.

참고문헌
  • 1. 1998 Stream corridor restoration: principles processes and practices. GPO Item No. 0120-A SuDocs No. A 57.6/2:EN3/PT.653 google
  • 2. 1992 Restoration of aquatic ecosystems:science technology and public policy google
  • 3. Sisk TD 1998 Perspectives on the land-use history of North America:a context for understanding our changing environment.Biological Science Report USGS/BRD/BSR 1998-0003 google
  • 4. 1999 Conservation corridors in the United States: benefits and planning guidelines [J. Soil Water Conservat] Vol.54 P.645-650 google
  • 5. Niezgoda SL, Johnson PA 2005 Improving the urban stream restoration effort: identifying critical form and processes relationships [Environ. Manage] Vol.35 P.579-592 google
  • 6. 2006 Evaluation of single- and multimetric benthic macroinvertebrate indicators of catchment disturbance over time at the Fort Benning Military Installation [Ecol. Indicators] Vol.6 P.469-484 google
  • 7. Kauffman JB, Beschta RL, Otting N, Lytjen D 1997 An ecological perspective of riparian and stream restoration in the Western United States [Fisheries] Vol.22 P.12-24 google
  • 8. 2000 Urban stream restoration practices: an initial assessment google
  • 9. Hassett B, Palmer M, Bernhardt E, Smith S, Carr J, Hart D 2005 Restoring watersheds project by project: trends in Chesapeake Bay tributary restoration [Front. Ecol. Environ] Vol.3 P.259-267 google
  • 10. Schwinn MA, Culpepper GD 2003 Stream assessment in Virginia:an evolving and dynamic process google
  • 11. Hall W 2003 The role of mitigation in a restoration strategy. In:Georgia Basin/Puget Sound Research Conference google
  • 12. Palmer M, Bernhardt E, Chornesky E 2004 Ecology for a crowded planet [Science] Vol.304 P.1251-1252 google
  • 13. Ward JV, Tockner K, Uehlinger U, Malard F 2001 Understanding natural patterns and processes in river corridors as the basis for effective river restoration [River Res. Appl] Vol.17 P.311-323 google
  • 14. Bernhardt ES, Palmer MA, Allan JD 2005 Synthesizing U.S. [river restoration efforts Science] Vol.308 P.636-637 google
  • 15. Somerville DE, Pruitt BA 2004 Physical stream assessment: a review of selected protocols for use in the Clean Water Act Section 404 Program. Prepared for the U.S. Environmental Protection Agency Office of Wetlands Oceans and WatershedsWetlands Division (Order No. 3W-0503-NATX) google
  • 16. Barbour MT, Gerritsen J, Snyder BD, Stribling JB 1999 Rapid bioassessment protocols for use in streams and wadeable rivers:periphyton benthic macroinvertebrates and fish second edition. Report No. EPA 841-B-99-002 google
  • 17. 2005 Stream attributes assessment methodology google
  • 18. 2006 Stream impact and compensation assessment manual google
  • 19. Strahler AN 1952 Dynamic basis of geomorphology. Bull [Geol.Soc. Am] Vol.63 P.923-938 google
  • 20. Roper BB, Scarnecchia DL 1995 Observer variability in classifying habitat types in stream surveys [N. Am. J. Fish. Manage] Vol.15 P.49-53 google
  • 21. Hannaford MJ, Barbour MT, Resh VH 1997 Training reduces observer variability in visual-based assessments of stream habitat [J. N. Am. Benthol. Soc] Vol.16 P.853-860 google
  • 22. 2007 tream attributes assessment methodology google
  • 23. Rosgen DL 1994 A classification of natural rivers [Catena] Vol.22 P.169-199 google
  • 24. Rosgen DL 1996 Applied river morphology google
  • 25. Schueler TR, Holland HK 2000 The importance of imperviousness.The practice of watershed protection google
  • 26. 2003 Impacts of impervious cover on aquatic systems google
  • 27. Vannote RL, Minshall GW, Cummins KW, Sedell JR, Cushing CE 1980 Cushing CE. The river continuum concept [Can. J. Fish. Aquat. Sci] Vol.37 P.130-137 google
  • 28. Ryder DS, Miller W 2005 Setting goals and measuring success:linking patterns and processes in stream restoration [Hydrobiologia] Vol.552 P.147-158 google
  • 29. Cetron A 2006 When is a stream not a stream? County considers more stream protection google
  • 30. Paul JF, Scott KJ, Campbell DE 2001 Developing and applying a benthic index of estuarine condition for the Virginian Biogeographic Province [Ecol. Indicators] Vol.1 P.83-99 google
  • 31. Hill BH, Herlihy AT, Kaufmann PR, DeCelles SJ, Vander Borgh MA 2003 Assessment of streams of the eastern United States using a periphyton index of biotic integrity [Ecol. Indicators] Vol.2 P.325-338 google
  • 32. Batema BO, Walbeck ES 2004 The public policy aspects of biological monitoring: budget and land-use planning implications at the county level [Environ. Monit. Assess] Vol.94 P.193-204 google
  • 33. Karr JR, Dudley DR 1981 Ecological perspective on water quality goals [Environ. Manage] Vol.5 P.55-68 google
  • 34. Weisberg SB, Ranasinghe JA, Dauer DM, Schaffner LC, Diaz RJ, Frithsen JB 1997 An estuarine benthic index of biotic integrity(B-IBI) for Chesapeake Bay [Estuaries] Vol.20 P.149-158 google
  • 35. Karr JR, Chu EW 2000 Sustaining living rivers [Hydrobiologia] Vol.422 P.1-14 google
  • 36. Wilcox D, Meeker J, Hudson P, Armitage B, Black M, Uzarski D 2002 Hydrologic variability and the application of index of biotic Integrity metrics to wetlands: a great lakes evaluation [Wetlands] Vol.22 P.588-615 google
  • 37. Southerland MT, Rogers GM, Kline MJ 2007 Improving biological indicators to better assess the condition of streams [Ecol. Indicat] Vol.7 P.751-767 google
  • 38. 2001 Stream protection strategy baseline study google
  • 39. Karr JR 1991 Biological integrity: a long-neglected aspect of water resource management [Ecol. Appl] Vol.1 P.66-84 google
  • 40. Ehrenfeld JG 2000 Defining the limits of restoration: the need for realistic goals [Restor. Ecol] Vol.8 P.2-9 google
  • 41. Roni P, Beechie TJ, Bilby RE, Leonetti FE, Pollock MM, Pess GR 2002 A review of stream restoration techniques and a hierarchical strategy for prioritizing restoration in Pacific Northwest watersheds [N. Am. J. Fish. Manage] Vol.22 P.1-20 google
  • 42. Palmer MA, Bernhardt ES, Allan JD 2005 Standards for ecologically successful river restoration [J. Appl. Ecol] Vol.42 P.208-217 google
  • 43. 1992 Restoration of aquatic ecosystems:science technology and public policy google
  • 44. Kondolf GM 1994 Learning from stream restoration projects. In:Proceedings of the Fifth Biennial Watershed Management Conference google
  • 45. Kondolf GM, Micheli ER 1995 Evaluating stream restoration projects [Environ. Manage] Vol.19 P.1-15 google
  • 46. Bash JS, Ryan CM 2002 Stream restoration and enhancement projects: is anyone monitoring [Environ. Manage] Vol.29 P.877-885 google
  • 47. Clarke SJ, Bruce-Burgess L, Wharton G 2003 Linking form and function: towards an eco-hydromorphic approach to sustainable river restoration. Aquat [Conserv. Mar. Freshwat. Ecosyst] Vol.13 P.439-450 google
  • 48. Poole GC, Frissell CA, Ralph SC 1997 In-stream habitat unit classification: inadequacies for monitoring and some consequences for management [J. Am. Water Resour. Assoc] Vol.33 P.879-896 google
  • 49. Laskowski SL, Kutz FW 1998 Environmental data in decision making in EPA regional offices [Environ. Monit. Assess] Vol.51 P.15-21 google
  • 50. Scholz JG, Booth DB 2001 Monitoring urban streams: strategies and protocols for humid-region lowland systems [Environ.Monit. Assess] Vol.71 P.143-164 google
  • 51. Volstad JH, Neerchal NK, Roth NE, Southerland MT 2003 Combining biological indicators of watershed condition from multiple sampling programs-a case study from MarylandUSA [Ecol. Indicators] Vol.3 P.13-25 google
  • 52. Astin LE 2006 Data synthesis and bioindicator development for nontidal streams in the interstate Potomac River basin USA [Ecol. Indicators] Vol.6 P.664-685 google
  • 53. Grumbine RE 1997 Reflections on “What is ecosystem management?” [Conserv. Biol] Vol.11 P.41-47 google
  • 54. Kondolf GM 1995 Five elements for effective evaluation of stream restoration [Restor. Ecol] Vol.3 P.133-136 google
  • 55. Caughlan L, Oakley KL 2001 Cost considerations for long-term ecological monitoring [Ecol. Indicators] Vol.1 P.123-134 google
  • 56. Executive Order 90: improving stream health and water quality by restoring streams throughout the Commonwealth google
  • 57. Poff NL, Allan JD, Bain MB 1997 The natural flow regime: a paradigm for river conservation and restoration P.769-784 google
  • 58. Angermeier PL, Karr JR 1994 Biological integrity versus biological diversity as policy directives [Protecting biotic resources.Bioscience] Vol.44 P.690-697 google
  • 59. Pedroli B, De Blust G, Van Looy K, Van Rooij S 2002 Setting targets in strategies for river restoration [Landscape Ecol] Vol.17 P.5-18 google
  • 60. Palmer MA, Allan JD 2006 Restoring rivers: policy recommendations to enhance effectiveness of river restoration [Sci. Technol] Vol.22 P.40-48 google
  • 61. Booth DB, Karr JR, Schauman S 2004 Reviving urban streams: land use hydrology biology and human behavior [J. Am. Water Resour. Assoc] Vol.40 P.1351-1364 google
  • 62. Lamy F, Bolte J, Santelmann M, Smith C 2002 Development and evaluation of multiple-objective decision-making methods for watershed management planning [J. Am. Water Resour.Assoc] Vol.38 P.517-529 google
  • 63. Community watershed assessment handbook google
  • 64. Gregory R, Ohlson D, Arvai J 2006 Deconstructing adaptive management:criteria for applications to environmental management [Ecol. Appl] Vol.16 P.2411-2425 google
  • 65. Gregory R, Failing L, Higgins P 2006 Adaptive management and environmental decision making: a case study application to water use planning [Ecol. Econ] Vol.58 P.434-447 google
  • 66. Holling CS 1978 United Nations Environment Programme [Adaptive environmental assessment and management. International series on applied systems analysis] Vol.3 google
  • 67. Walters CJ 1986 Adaptive management of renewable resources google
  • 68. Gunderson L 1999 Resilience flexibility and adaptive management--antidotes for spurious certitude? [Conserv] Vol.3 google
  • 69. Johnson BL 1999 The role of adaptive management as an operational approach for resource management agencies [Conserv.Ecol] Vol.3 google
  • 70. Berkes F, Colding J, Folke C 2000 Rediscovery of traditional ecological knowledge as adaptive management [Ecol. Appl] Vol.10 P.1251-1262 google
  • 71. Walters C 1997 Challenges in adaptive management of riparian and coastal ecosystems [Conserv. Ecol] Vol.1 google
  • 72. Walters CJ, Holling CS 1990 Large-scale management experiments and learning by doing. [Ecology] Vol.71 P.2060-2068 google
  • 73. 2005 Fairfax County streams mapping project:quality control/quality assurance methodology and results google
  • 74. 2003 Forest change in Northern Virginia 1937-1998 google
  • 75. 2002 Low Impact Development Center. Reston Virginia watershed plan google
  • 76. Galli J 1996 Final technical memorandum: rapid stream assessment technique (RSAT) field methods google
  • 77. 1999 Provision of a stream inventory report on watershed restoration opportunitiesand training services for county staff in stream surveying techniques google
  • 78. 2001 Watershed management plan google
  • 79. 2006 Public facilities manual google
  • 80. 1998 NWCC Technical Note 99-1. Stream visual assessment protocol google
  • 81. Doll BA, Grabow GL, Hall KR Stream restoration: a natural channel design handbook google
  • 82. 2005 Understanding the Chesapeake Bay preservation ordinance amendments: important information for Fairfax County homeowners google
  • 83. Schueler T An integrated framework to restore small urban watersheds version 2.0. Manual 1 google
  • 84. Jungwirth M, Muhar S, Schmutz S 2002 Re-establishing and assessing ecological integrity in riverine landscapes [Freshwat.Biol] Vol.47 P.867-887 google
이미지 / 테이블
  • [ Fig. 1. ]  Map of Northern Virginia that shows several counties where active stream restoration and mitigation occur.
    Map of Northern Virginia that shows several counties where active stream restoration and mitigation occur.
  • [ Table 1. ]  History of the development of a stream assessment protocol in Virginia
    History of the development of a stream assessment protocol in Virginia
  • [ Table 2. ]  Comparison of the Stream Attribute Assessment Methodology (SAAM) Stream Impact Compensation Assessment Manual (SICAM)and Unified Stream Methodology (USM) Variables and Scoring
    Comparison of the Stream Attribute Assessment Methodology (SAAM) Stream Impact Compensation Assessment Manual (SICAM)and Unified Stream Methodology (USM) Variables and Scoring
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