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The Effectiveness of Global Constructed Shallow Waterbody Design Guidelines to Limit Harmful Algal Blooms
Water Resources Research ( IF 5.4 ) Pub Date : 2021-07-27 , DOI: 10.1029/2020wr028918
S. Liu 1 , F. Johnson 1 , B. Tamburic 1 , N. D. Crosbie 2, 3 , W. Glamore 4
Affiliation  

Constructed shallow waterbodies are often designed and built to limit harmful algal blooms in urban regions. Efforts to reduce algal bloom occurrence in these waterbodies have largely focused on waterbody design, catchment criteria and onsite engineering options. However, many constructed shallow waterbodies that comply with design guidelines still experience harmful algal blooms. Identifying the knowledge gaps in current guidelines and examining their recommended design criteria can improve their effectiveness to reduce algal outbreaks. Here, we reviewed 66 global guidelines and identified common design criteria. The use of a ‘one size fits all' empirical approach and dated literature are common issues associated with the design criteria recommended. Further, only approximately one third of the guidelines that were analyzed directly mentioned harmful algal bloom-related design criteria. To test the validity of these design values in a real-world setting, the suitability of design factors in limiting harmful algal blooms was assessed by analyzing 222 shallow waterbodies monitored over a 9 year period in southeastern Australia. The site analysis indicated that macrophyte area to surface area ratio, shoreline development index, and fetch are the three most influential single design factors associated with harmful algal bloom reduction. The analyses highlighted the ineffectiveness of the existing design criteria globally, with blooms occurring even though some waterbodies were designed in accordance with recommended parameters. The analysis suggested that understanding interactions between multiple design factors may be a useful approach, for example, when considering the macrophyte area to surface area ratio in combination with the shoreline development index.

中文翻译:

全球人工浅水体设计指南对限制有害藻华的有效性

建造的浅水体的设计和建造通常是为了限制城市地区的有害藻华。减少这些水体中藻华发生的努力主要集中在水体设计、集水标准和现场工程选择上。然而,许多符合设计准则的建造浅水体仍然会出现有害的藻华。确定当前指南中的知识差距并检查其推荐的设计标准可以提高其减少藻类爆发的有效性。在这里,我们回顾了 66 条全球指南并确定了通用设计标准。使用“一刀切”的经验方法和过时的文献是与推荐的设计标准相关的常见问题。更远,在直接分析的指南中,只有大约三分之一提到了与有害藻华相关的设计标准。为了测试这些设计值在现实环境中的有效性,通过分析澳大利亚东南部 9 年期间监测的 222 个浅水体,评估了设计因素在限制有害藻华方面的适用性。场地分析表明,大型植物面积与表面积之比、海岸线开发指数和取水量是与减少有害藻华相关的三个最有影响的单一设计因素。分析强调了现有设计标准在全球范围内的无效性,即使一些水体是根据推荐参数设计的,也会发生水华。
更新日期:2021-08-10
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