oitav - verdugo河流域(西班牙西北部)基于自然的洪水风险管理解决方案评价

IF 1.6 Q3 WATER RESOURCES Water Practice and Technology Pub Date : 2023-03-28 DOI:10.2166/wpt.2023.043
Carolina Acuña Alonso, Lucia Martínez Portabales, Enrique Valero, X. Álvarez
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引用次数: 0

摘要

洪水是经常发生的现象,具有重大的环境和社会经济影响。当土地利用发生变化时,洪水的风险会增加。本研究的目的是在HEC-HMS模型开发的基础上获得一种综合方法,该方法从2018年至2022年的事件中进行校准和验证,并使用基于自然的解决方案(NbS)工具进行模拟。该模型已在verdugo - oitavsamin河流域(西班牙西北部)应用。三种不同的情景建议:(1)整个流域30%的废弃农业用地的再造林,(2)上游(s -上游)的再造林,(3)两个子流域(s -下游)的再造林。上游造林对流域造林的峰值流量和水文量都有类似的减少。S-Upstream模拟达到峰值减少8%,但当降水事件持续时间较长时,这一百分比下降,5天或更长时间的事件减少3.3%。另一方面,下游再造林对减少最大排放事件的影响最小(1%)。使用基于国家统计局的战略将改善流域综合管理,降低洪水风险,改善环境治理。
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Evaluation of nature-based solutions for flood risk management in the Oitavén-Verdugo River Basin (NW Spain)
Floods are recurrent phenomena with significant environmental and socio-economic impacts. The risk of flooding can increase when land use changes. The objective of this research has been to obtain an integrative methodology based on the development of a model in HEC-HMS, calibrated and validated from events between 2018 and 2022, and to apply simulations employing the use of Nature-Based Solutions (NbS) tools. This model has been applied in Verdugo-Oitavén River Basin (NW Spain). Three different scenarios propose (1) the reforestation of 30% of abandoned agricultural land across the basin, (2) reforestation upstream (S-Upstream), and (3) reforestation in two sub-basins (S-Downstream). Upstream afforestation provided a similar reduction to catchment-wide afforestation for both peak discharge and hydrograph volumes. The S-Upstream simulation reaches peak reductions of 8%, but this percentage decreases when precipitation events are long lasting, reaching a reduction of 3.3% for events of 5 days or more. On the other hand, downstream reforestation has minimal effect (1%) in reducing maximum discharge of events. The use of NbS-based strategies would improve integrated watershed management, reduce flood risk, and improve environmental governance.
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来源期刊
CiteScore
2.30
自引率
6.20%
发文量
136
审稿时长
14 weeks
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