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Risk, Drinking Water and Harmful Algal Blooms: A Contingent Valuation of Water Bans
Water Resources Management ( IF 4.3 ) Pub Date : 2020-08-22 , DOI: 10.1007/s11269-020-02653-x
Marie-Pier Schinck , Chloé L’Ecuyer-Sauvageau , Justin Leroux , Charlène Kermagoret , Jérôme Dupras

Facilities using surface water to provide drinking water to communities must contend with the risk of cyanobacteria and cyanotoxin infiltration. Although risk management protocols can be put in place to anticipate the presence of cyanotoxins in concentrations exceeding guidelines, based on cyanobacterial cell count for example, this indicator is not infallible. The Canadian province of Quebec, among other jurisdictions, issues water bans when high concentrations of cyanotoxins are detected. While necessary, these bans are costly to communities. We perform a contingent valuation survey in areas at risk of being impacted by a water ban in the future to assess the preferences of residents and the economic value of detection and treatment tools that could eliminate cyanotoxins. The survey was completed by 240 people. Each respondent was asked a double-bounded dichotomous choice question. The scenario implied changes to the current situation regarding the possibility of predicting the presence of cyanotoxins in the facility, the average duration of water bans, the possibility of providing advance notice, all relative to the cost of these measures. The analysis of the survey responses allowed us to determine the willingness to pay (WTP) of households for diagnostic and treatment tools in drinking water facilities. Our analysis indicates that the mean WTP was $135 per household per year. Given that the experts developing the tools estimate the cost of implementation at $110 per household per year, our results suggest that implementation is economically viable.



中文翻译:

风险,饮用水和有害藻华:水禁令的临时评估

使用地表水向社区提供饮用水的设施必须应对蓝细菌和氰毒素渗透的风险。尽管可以制定风险管理协议来预测是否存在浓度超过标准的蓝藻毒素,例如基于蓝藻细胞计数,但该指标并非绝对可靠。在其他管辖区中,加拿大魁北克省在发现高浓度的氰毒素时发布禁水令。在必要时,这些禁令对社区而言代价高昂。我们在将来可能会受到禁水影响的地区进行评估评估,以评估居民的偏好以及可以消除蓝藻毒素的检测和处理工具的经济价值。这项调查由240人完成。每个受访者都被问到一个双重的二分法选择问题。该场景暗示了与当前状况有关的变化,这些变化涉及预测设施中是否存在氰毒素的可能性,平均禁水时间,提前发出通知的可能性,这些都与这些措施的成本有关。通过对调查答复的分析,我们可以确定家庭对饮用水设施中的诊断和治疗工具的支付意愿(WTP)。我们的分析表明,平均每户每年WTP为$ 135。假设开发工具的专家估计实施成本为每户每年$ 110,我们的结果表明实施在经济上是可行的。该场景暗示了与当前状况有关的变化,这些变化涉及预测设施中是否存在氰毒素的可能性,平均禁水时间,提前发出通知的可能性,这些都与这些措施的成本有关。通过对调查答复的分析,我们可以确定家庭对饮用水设施中的诊断和治疗工具的支付意愿(WTP)。我们的分析表明,平均每户每年WTP为$ 135。鉴于开发工具的专家估计实施成本为每户每年$ 110,我们的结果表明实施在经济上是可行的。该场景暗示了与当前状况有关的变化,这些变化涉及预测设施中是否存在氰毒素的可能性,平均禁水时间,提前发出通知的可能性,这些都与这些措施的成本有关。通过对调查答复的分析,我们可以确定家庭对饮用水设施中的诊断和治疗工具的支付意愿(WTP)。我们的分析表明,平均每户每年WTP为$ 135。假设开发工具的专家估计实施成本为每户每年$ 110,我们的结果表明实施在经济上是可行的。所有这些都与这些措施的成本有关。通过对调查答复的分析,我们可以确定家庭对饮用水设施中的诊断和治疗工具的支付意愿(WTP)。我们的分析表明,平均每户每年WTP为$ 135。假设开发工具的专家估计实施成本为每户每年$ 110,我们的结果表明实施在经济上是可行的。所有这些都与这些措施的成本有关。通过对调查答复的分析,我们可以确定家庭对饮用水设施中的诊断和治疗工具的支付意愿(WTP)。我们的分析表明,平均每户每年WTP为$ 135。假设开发工具的专家估计实施成本为每户每年$ 110,我们的结果表明实施在经济上是可行的。

更新日期:2020-08-22
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