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How Specific Is Site‐Specific? A Review and Guidance for Selecting and Evaluating Approaches for Deriving Local Water Quality Benchmarks
Integrated environmental assessment and management, 2019-09, Vol.15 (5), p.683-702
van Dam, Rick A
Hogan, Alicia C
Harford, Andrew J
Humphrey, Chris L
2019
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
van Dam, Rick A
Hogan, Alicia C
Harford, Andrew J
Humphrey, Chris L
Titel
How Specific Is Site‐Specific? A Review and Guidance for Selecting and Evaluating Approaches for Deriving Local Water Quality Benchmarks
Ist Teil von
Integrated environmental assessment and management, 2019-09, Vol.15 (5), p.683-702
Ort / Verlag
United States: Blackwell Publishing Ltd
Erscheinungsjahr
2019
Quelle
Wiley Online Library - AutoHoldings Journals
Beschreibungen/Notizen
ABSTRACT Existing prescriptive guidance on the derivation of local water quality benchmarks (WQBs; e.g., guideline values, criteria, standards) for protecting aquatic ecosystems is limited to only 3 to 4 specific approaches. These approaches do not represent the full suite available for deriving local WQBs for multiple types of water quality–related issues. The general lack of guidance is inconsistent with the need for, and benefits of, local WQBs, and can constrain the appropriate selection and subsequent evaluation of derivation approaches. Consequently, the defensibility of local WQBs may not be commensurate with the nature of the issues for which they are derived. Moreover, where local WQBs are incorporated into regulatory requirements, the lack of guidance presents a potential risk to the derivation of appropriate WQBs and the achievement of desired environmental outcomes. This review addresses the deficiency in guidance by 1) defining local WQBs and outlining initial considerations for deciding if one is required; 2) summarizing the existing regulatory context; 3) summarizing existing guidance and identifying gaps; 4) describing strengths, weaknesses, and potential applications of a range of derivation approaches based on laboratory and/or field data; and 5) presenting a conceptual framework for appropriately selecting and evaluating a derivation approach to best suit the need. The guidance incorporates an existing set of guiding principles for deriving local WQBs and reinforces an existing categorization of site‐adapted and site‐specific WQBs. The conceptual framework recognizes the need to strike an appropriate balance between effort and ecological risk and, thus, embeds the concept of fit‐for‐purpose by considering both the significance of the issue being assessed and the extent to which the approach provides confidence that the ecosystem will be appropriately protected. The guidance can be used by industry, regulators, and others for both the a priori selection and the post hoc evaluation of appropriate approaches for deriving local WQBs. Integr Environ Assess Manag 2019;15:683–702. © 2019 The Authors. Key Points Local water quality benchmarks (WQBs; i.e., guideline values, criteria, standards) are often used for regulatory purposes in numerous countries, yet the limited guidance for their derivation covers only 3 to 4 derivation methods. This review sets the global context for local WQB derivation, describes the strengths, weaknesses, and applications of a range of laboratory‐ and field‐based derivation approaches and, finally, presents a conceptual framework for selecting and evaluating a derivation approach to suit the need. Site‐adapted benchmarks are those in which a generic benchmark is modified to make it more representative of the site of interest, whereas site‐specific benchmarks are those in which a new benchmark is derived to specifically account for local conditions and communities. The conceptual framework embeds the concept of fit‐for‐purpose WQB derivation by considering 1) the significance of the issue being assessed and 2) the extent to which the derivation approach provides confidence that the aquatic ecosystem will be protected.
Sprache
Englisch
Identifikatoren
ISSN: 1551-3777
eISSN: 1551-3793
DOI: 10.1002/ieam.4181
Titel-ID: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_6851750
Format
–
Schlagworte
Aquatic ecosystem
,
Aquatic ecosystems
,
Benchmark
,
Benchmarking - methods
,
Benchmarking - standards
,
Benchmarks
,
Critical Review
,
Derivation
,
Ecosystems
,
Environmental management
,
Environmental risk
,
Evaluation
,
Guideline value
,
Regulators
,
Site‐specific
,
Water Pollutants, Chemical - analysis
,
Water quality
,
Water Quality - standards
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