Urbanization under a Changing Climate–Impacts on Hydrology

Valeo, Caterina; He, Jianxun; Kasiviswanathan, K. S.

doi:10.3390/w13040393

Cited by 4 publications

(4 citation statements)

References 8 publications

(16 reference statements)

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“…Scale can refer to either the spatial or the temporal scale. Spatial scale is defined as the extent of an area or space where the event or observation takes place and temporal scale is the total time or duration the event/observation occurs (Fischer and Schumann, 2020;Valeo et al, 2021). Flood assessment requires the data and analyses at various spatial and temporal scales, i.e., area (local or local-regional or regional) and duration, respectively.…”

Section: Criteria For Choosing a Flood Assessment Methodsmentioning

confidence: 99%

Flood Impact Assessments on Transportation Networks: A Review of Methods and Associated Temporal and Spatial Scales

Rebally

Valeo

et al. 2021

Front. Sustain. Cities

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A region's transportation sector is vital to its economic and social health. Transportation systems are also influenced by climate change directly and indirectly and on a variety of spatial and temporal scales. Under a changing climate, many regions around the globe and especially in urban areas, have experienced increases in flood intensity and frequency in recent decades. Flooding can strain transportation networks in both the short- and long-term through transportation delays, infrastructure damage, and recovery, and potentially affect economies. The present article is a review of how flooding impacts transportation networks in both short- and long-term timescales and their subsequent impact on resiliency of the network. Firstly, flood effects are classified based on the connections between the type of flooding and the type of impact (either direct or indirect) on the transportation system. An analysis of the assessment methods and the transport models used to formulate flood effects on the transportation system is provided, as well as the drawbacks from the context of timescales, and recommendations for future research. The analysis indicates that the majority of the articles assess the direct and tangible impacts with focus on the resilience of the transportation network in short- and medium-term temporal scales and at smaller spatial scales. There is less emphasis on indirect, intangible flood impacts, and long-term temporal scales.

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Section: Criteria For Choosing a Flood Assessment Methodsmentioning

confidence: 99%

Flood Impact Assessments on Transportation Networks: A Review of Methods and Associated Temporal and Spatial Scales

Rebally

Valeo

et al. 2021

Front. Sustain. Cities

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“…As reported, stormwater is one of the largest sources of pollutants, including suspended solids and metals, which pollute water bodies (Aryal et al 2010). Knowledge and control of urban runoff and interfering factors are essential for management measures (Valeo et al 2021). There are few studies about stormwater ponds, especially in tropical countries.…”

Section: Discussionmentioning

confidence: 99%

Temporal variation and risk assessment of heavy metals and nutrients from water and sediment in a stormwater pond, Brazil

et al. 2022

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Urban watercourses are under pressure owing to the inflow of environmental pollutants from stormwater and effluent. The concentrations of heavy metals, ammoniacal nitrogen, total phosphorus (TP), and physicochemical parameters were monitored in a sediment pond in the Brazilian Midwest. The correlation between the variables and the degree of sediment contamination was verified using the Geoaccumulation Index (Igeo), Contamination Factor (CF), and Pollutant Load Index (PLI). The general concentrations of the metals were in the order Mn > B > Ba > Zn > Cu > Cr > Pb > Ni in the water and Mn > Cr > Ba ≥ B > Zn > Cu > Ni > Pb in the sediment. The concentrations of Ba, Cr, Cu, Mn, Ni, Pb, and TP in the water exceeded the regulatory limits at least one. The mean concentrations of Cr, Cu, and Ni in the sediment samples were 6.32, 1.63, and 2.61 uppers than the background values. The applied geochemical indices indicated a moderate to a very high degree of sediment contamination, suggesting the anthropogenic origin of Cr, Cu, and Ni. Significant Pearson correlations were observed between turbidity and total suspended solids (TSS), Ba, Cr, Mn, Zn, and TP. Ponds and urban lakes require maintenance or may become a source of environmental pollutants.

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“…Recent studies indicate that urban expansion and increase in surface imperviousness influence flood risk management and the design of runoff infrastructures (Chan et al, 2021;Miller et al, 2014). Climate change likely alters rainfall events and attributes impact on surface runoff magnitude at various spatiotemporal scales (Alfieri et al, 2016;Valeo et al, 2021). Thus, a wide range of socioeconomic, environmental, and water-related issues in urban areas are becoming more challenging.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis on stormwater management response to land cover dynamics and urban expansion of developing City in Lake Hawassa watershed, Ethiopia

Kassay,

Tuhar,

Ulsido

2024

J Flood Risk Management

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Hawassa is a rapidly developing city in Lake Hawassa watershed of Ethiopia. Analyzing the effect of land cover dynamics on surface runoff remains imperative to adaptive urban stormwater management. This study quantified spatial variation of land cover and sensitivity of stormwater management response. Historical 30 years of daily annual rainfall, three satellite imageries, DEM, and hydrological soil group data were analyzed. A statistical‐based combined approach of geospatial techniques and Soil Conservation Service‐Curve Number (SCS‐CN) model was employed. CN and surface runoff depth for the delineated urban watersheds were determined. The result revealed that the built‐up area increased by 30.9 km2, where the rate varies spatially. The variation of impervious land cover explains 58.6% of change in CN with coefficient of 0.352. While CN is inversely correlated with agricultural and vegetation land cover variations. The finding suggests CN explains 96.78% of the change in surface runoff with a significant correlation coefficient of 3.91. The proposed integrated model approach justifies the potential to reorganize the relationship between the spatial effect of land cover variation on surface runoff at the urban watersheds. Thus, suitable local‐specific solutions can be devised for effective management of flood risk and optimize the drainage system of urban areas.

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Urbanization under a Changing Climate–Impacts on Hydrology

Abstract: On a global scale, urbanization and climate change are two powerful forces that are reshaping ecosystems and their inhabitants [...]

Cited by 4 publications

References 8 publications

Flood Impact Assessments on Transportation Networks: A Review of Methods and Associated Temporal and Spatial Scales

Flood Impact Assessments on Transportation Networks: A Review of Methods and Associated Temporal and Spatial Scales

Temporal variation and risk assessment of heavy metals and nutrients from water and sediment in a stormwater pond, Brazil

Sensitivity analysis on stormwater management response to land cover dynamics and urban expansion of developing City in Lake Hawassa watershed, Ethiopia

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