Potential implications of climate change and urbanization on watershed hydrology

Pumo, Dario; Arnone, Elisa; Francipane, Antonio; Caracciolo, Domenico; Noto, Leonardo

doi:10.1016/j.jhydrol.2017.09.002

Cited by 104 publications

(43 citation statements)

References 53 publications

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“…Impact of climate change is wide spread, and it has negative impacts in various aspects of rural livelihood [19]. Those impacts can be observed through increased and uncertain impacts on hydrological functioning, depletion of water sources, decrease in soil productivity, ecological degradation, increased disaster risk, resulting in reduction of land productivity and economic performances [20][21][22][23]. Agriculture based communities in the rural areas are supposed to be hardest hit by the climate change impacts.…”

Section: -Scope Of Sdp In Building Climate Resilient Communitiesmentioning

confidence: 99%

Revisiting Agroforestry for Building Climate Resilient Communities: A Case of Package-Based Integrated Agroforestry Practices in Nepal

2019

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Agriculture based livelihoods in the developing countries are bearing significant negative impacts due to climate change. In this scenario, agroforestry is one of the best alternatives to cope with climate change and disaster risks. However, the agroforestry approaches adopted in the past were sectoral and partial, and were insufficient to contribute to socio-economic wellbeing and resilient communities. Nepal has been implementing package-based integrated agroforestry since 2016. It is a project approach to advance agroforestry practices by including disaster mitigation, land and water management, and community development activities. This paper reflects on the process and outcomes of the agroforestry practices, implemented by the government in seven super zones of Nepal. The programs have shown fairly satisfactory output in building adaptive capacity to climate change, awareness and active participation in agroforestry development activities. This paper reveals that the agroforestry alone cannot be sustained, and hence, it has to be integrated with land productivity enhancement, natural resource management, climate change adaptation, and livelihood support in addition to tree plantation in agricultural lands. This paper is crucial in understanding the scope of package-based integrated agroforestry approach to build climate resilient communities.

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Section: -Scope Of Sdp In Building Climate Resilient Communitiesmentioning

confidence: 99%

Revisiting Agroforestry for Building Climate Resilient Communities: A Case of Package-Based Integrated Agroforestry Practices in Nepal

2019

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“…More broadly, previous studies quantifying the impact of climate change and urbanization have been mostly carried out at the city or catchment scale (Jung et al 2011, Kaspersen et al 2015, Aich et al 2016, Pumo et al 2017. For example, Kaspersen et al (2015) input current and future rainfall extreme data in combination with historical and current land use data to a 2D flow model in order to quantify the relative contributions of climate and land use to flood hazard for a city in Denmark.…”

Section: Introductionmentioning

confidence: 99%

Disentangling the impacts of human and environmental change on catchment response during Hurricane Harvey

Sebastian

Gori

Blessing

et al. 2019

Environ. Res. Lett.

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Flooding is a function of hydrologic, climatologic, and land use characteristics. However, the relative contribution of these factors to flood risk over the long-term is uncertain. In response to this knowledge gap, this study quantifies how urbanization and climatological trends influenced flooding in the greater Houston region during Hurricane Harvey. The region-characterized by extreme precipitation events, low topographic relief, and clay-dominated soils-is naturally flood prone, but it is also one of the fastest growing urban areas in the United States. This rapid growth has contributed to increased runoff volumes and rates in areas where anthropogenic climate changes has also been shown to be contributing to extreme precipitation. To disentangle the relative contributions of urban development and climatic changes on flooding during Hurricane Harvey, we simulate catchment response using a spatially-distributed hydrologic model under 1900 and 2017 conditions. This approach provides insight into how timing, volume, and peak discharge in response to Harvey-like events have evolved over more than a century. Results suggest that over the past century, urban development and climate change have had a large impact on peak discharge at stream gauges in the Houston region, where development alone has increased peak discharges by 54% (±28%) and climate change has increased peak discharge by about 20% (±3%). When combined, urban development and climate change nearly doubled peak discharge (84% ±35%) in the Houston area during Harvey compared to a similar event in 1900, suggesting that land use change has magnified the effects of climate change on catchment response. The findings support a precautionary approach to flood risk management that explicitly considers how current land use decisions may impact future conditions under varying climate trends, particularly in low-lying coastal cities.

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“…In the last years, the ever-increasing availability of hydrological models (Chen et al, 2005;Karlsson et al, 2016;Mango, Melesse, McClain, Gann, & Setegn, 2011;Pumo, Lo Conti, Viola, & Noto, 2017;Quilbe et al, 2007;Todd, Goss, Tripathy, & Harbor, 2007;van Roosmalen, Sonnenborg, & Jensen, 2009;Zhang, Nan, Xu, & Li, 2016) and data from observations (Pumo, Arnone, Francipane, Caracciolo, & Noto, 2017) has led to study the combined effect of climate change and urban growth on the hydrological response of a catchment. Most of these studies have demonstrated that the hydrological impacts of land-use change can be compounded or offset by changes in regional climate (Chawla & Mujumdar, 2015;Cuo, Lettenmaier, Alberti, & Richey, 2009;Pan et al, 2017;Pumo, Lo Conti, et al, 2017;Todd et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

The role of urban growth, climate change, and their interplay in altering runoff extremes

Arnone

Pumo

Francipane

et al. 2018

Hydrological Processes

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Changes in climate and urban growth are the most influential factors affecting hydrological characteristics in urban and extra‐urban contexts. The assessment of the impacts of these changes on the extreme rainfall–runoff events may have important implications on urban and extra‐urban management policies against severe events, such as floods, and on the design of hydraulic infrastructures. Understanding the effects of the interaction between climate change and urban growth on the generation of runoff extremes is the main aim of this paper. We carried out a synthetic experiment on a river catchment of 64 km2 to generate hourly runoff time series under different hypothetical scenarios. We imposed a growth of the percentage of urban coverage within the basin (from 1.5% to 25%), a rise in mean temperature of 2.6 °C, and an alternatively increase/decrease in mean annual precipitation of 25%; changes in mean annual precipitation were imposed following different schemes, either changing rainstorm frequency or rainstorm intensity. The modelling framework consists of a physically based distributed hydrological model, which simulates fast and slow mechanisms of runoff generation directly connected with the impervious areas, a land‐use change model, and a weather generator. The results indicate that the peaks over threshold and the hourly annual peaks, used as hydrological indicators, are very sensitive to the rainstorm intensity. Moreover, the effects of climate changes dominate on those of urban growth determining an exacerbation of the fast runoff component in extreme events and a reduction of the slow and deep runoff component, thus limiting changes in the overall runoff.

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Potential implications of climate change and urbanization on watershed hydrology

Cited by 104 publications

References 53 publications

Revisiting Agroforestry for Building Climate Resilient Communities: A Case of Package-Based Integrated Agroforestry Practices in Nepal

Revisiting Agroforestry for Building Climate Resilient Communities: A Case of Package-Based Integrated Agroforestry Practices in Nepal

Disentangling the impacts of human and environmental change on catchment response during Hurricane Harvey

The role of urban growth, climate change, and their interplay in altering runoff extremes

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