article · Natural Hazards
Flash floods and changing rainfall patterns under climate change pose significant threats to vulnerable communities such as Nagaa Mobarak village in Souhag, Egypt. An assessment evaluated both traditional engineering works, such as dams, storage ponds, and routing channels, and nature-based ecohydrological interventions, including vegetated foreshores, natural levees, and constructed wetlands. The findings demonstrate that a hybrid approach combining conventional and ecohydrological measures delivers the most effective flood management. Integrating a constructed wetland along a diversion channel linked to the Nagaa Hammade Canal reduces runoff volumes and extends peak arrival times, preventing the canal from exceeding its capacity. Furthermore, this intervention cleanses incoming stormwater, enhancing water quality and supporting downstream aquatic ecosystems while contributing directly to ten United Nations Sustainable Development Goals.
Flash floods can devastate rural settlements and overwhelm regional water networks. By coupling traditional civil engineering with nature-based wetlands, communities can prevent flood damage, buffer against severe climate events, and clean runoff water before it reaches canals. This dual approach protects human lives, preserves local infrastructure, and improves freshwater ecosystems simultaneously.
This research provides design insights for municipal engineers, environmental consultants, and water resource authorities designing climate-resilient flood mitigation infrastructure. The work is at an applied case-study stage, showing how constructed wetlands can be integrated into stormwater channels. Real-world adoption would require site-specific civil engineering design, regulatory environmental permits, and capital investment from infrastructure developers or regional development agencies.
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Abstract This article aims to provide a thorough assessment of water quality and quantity incorporating the estimation of future patterns as a result of climate change from economic, environmental and social perspectives. Its scope extends from studying the physical parameters and rainfall patterns to maintaining an environmental flow with a better water quality using ecohydrological techniques. The village of Nagaa Mobarak in Souhag, Egypt, is taken as a case study being in a critical location that is vulnerable to flash floods. This paper managed to quantify change in water quantity and quality due to the impacts of flash floods and climate change. Several traditional engineering alternatives are proposed for flood management such as constructing a dam, a storage pond and a routing channel to the nearest water body; as well as non-traditional ecohydrological alternatives such as constructing a dam with vegetated foreshore, natural levees and constructed wetlands. The results of applying these methods for our case study showed that a hybrid solution that employs both traditional and non-traditional solutions for flood management is optimal. A constructed wetland along a section of the constructed channel for diverting flow into the Nagaa Hammade Canal would decrease the runoff volume and peak time so that the capacity of the Canal is not exceeded in a flood event and purifies the incoming stormwater improving its quality and the health of the ecosystem within the canal. Moreover, our proposed approach was investigated and found to target 10 out of the 17 UN SDGs.
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DOI: 10.1007/s11069-022-05220-2
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