估算全州水质信贷需求的地理信息系统方法:应用于弗吉尼亚州规划的交通项目

IF 2.6 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Jacob D. Nelson, Benjamin D. Bowes, Linnea Saby, Majid Shafiee-Jood, Jonathan L. Goodall
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引用次数: 0

摘要

水质交易(WQT)市场的不确定性经常被认为是阻碍参与的因素,但很少有研究关注未来水质信用需求的不确定性。为了减少这种不确定性,我们提出了一种基于地理信息系统 (GIS) 的方法,用于估算一个大地理区域内一组空间参照规划建设项目的水质信用需求上限。我们将该方法应用于估算弗吉尼亚州交通部(VDOT)6 年改进计划的未来信用需求,并对其进行了演示。结果表明,该州 25% 的 6 位水文单元代码(HUC)流域目前缺乏足够的信贷供应,仅凭弗吉尼亚州交通部计划项目的信贷需求就无法满足未来的信贷需求。此外,在包含计划项目的 8 位数水文单元代码流域中,有 70% 的流域目前有足够的信贷供应来满足 VDOT 的信贷需求,但在 10 位数水文单元代码流域中,只有 20% 的流域有足够的信贷供应。最后,近 25% 的规划交通项目(按当前市场费率计算,可能需要购买 900 万美元的信用额度)将建在水体受损的集水区。国家法规最初将限制这些项目与位于 12 位数 HUC 级别的信贷银行进行交易。该应用展示了如何应用基于 GIS 的方法来减少未来 WQT 信用需求的不确定性,以及如何将需求与当前的信用供应相协调。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A geographic information system approach for estimating state-wide water quality credit need: Application for planned transportation projects in Virginia

A geographic information system approach for estimating state-wide water quality credit need: Application for planned transportation projects in Virginia

Uncertainty in water quality trading (WQT) markets is frequently cited as a deterrent for participation, with few studies focusing on uncertainty in future water quality credit needs. To reduce this uncertainty, we present a geographic information system (GIS)-based methodology for estimating an upper bound of water quality credit needs for a set of spatially referenced planned construction projects over a large geographic region. We demonstrate the methodology by applying it to estimate future credit needs for the Virginia Department of Transportation's (VDOT) 6-year improvement program. The results show that 25% of the state's 6-digit hydrologic unit code (HUC) basins lack sufficient current credit supply to meet the estimated future credit need from VDOT's planned projects alone. Furthermore, while 70% of the 8-digit HUCs containing planned projects have a sufficient current credit supply to meet VDOT credit needs, this is true for only 20% of the 10-digit HUCs. Finally, nearly 25% of the planned transportation projects, representing potentially $9 million in credit purchases at current market rates, will be constructed in catchments with impaired water bodies. State regulations will initially limit these projects to trade with credit banks collocated at the 12-digit HUC level. This application demonstrates how the GIS-based methodology can be applied to reduce uncertainty about future WQT credit needs and how needs are aligned with current credit supply.

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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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