Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Marziali, Laura; Tartari, Gianni; Salerno, Franco; Valsecchi, Lucia; Bravi, Clara; Lorenzi, Erika; Genoni, Pietro; Guzzella, Licia

doi:10.3390/w9090680

Cited by 5 publications

(2 citation statements)

References 98 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many climate adaptation and mitigation strategies with respect to water management in agricultural sector are being practiced at various levels (e.g., farm, irrigation scheme, watershed/aquifer, river basin, and national levels). Apart from social and policy level measures, the water sector particularly considers promoting efficient on-farm water management (water-saving devices, improving efficiency of water distribution and use, reusing waste water) 11 , managed aquifer recharge 12 , management of artificial and natural reservoirs 13 , 14 and geographical shifting of cultivation areas of some crops 15 as potential alternatives for adapting and mitigating the impacts of climate change on water resources. Crop management practices like early planting and use of cultivars most suitable for warmer climates have also been practiced in some regions of the world 16 , 17 .…”

Section: Introductionmentioning

confidence: 99%

A high-resolution assessment of climate change impact on water footprints of cereal production in India

Mali

Shirsath

2021

Sci Rep

View full text Add to dashboard Cite

Water footprint (WF), a comprehensive indicator of water resources appropriation, has evolved as an efficient tool to improve the management and sustainability of water resources. This study quantifies the blue and green WF of major cereals crops in India using high resolution soil and climatic datasets. A comprehensive modelling framework, consisting of Evapotranspiration based Irrigation Requirement (ETIR) tool, was developed for WF assessment. For assessing climate change impact on WF, multi-model ensemble climate change scenarios were generated using the hybrid-delta ensemble method for RCP4.5 and RCP6.0 and future period of 2030s and 2050s. The total WF of the cereal crops are projected to change in the range of − 3.2 to 6.3% under different RCPs in future periods. Although, the national level green and blue WF is projected to change marginally, distinct trends were observed for Kharif (rainy season—June to September) and rabi (winter season—October to February) crops. The blue WF of paddy is likely to decrease by 9.6%, while for wheat it may increase by 4.4% under RCP4.5 during 2050s. The green WF of rabi crops viz. wheat and maize is likely to increase in the range of 20.0 to 24.1% and 9.9 to 16.2%, respectively. This study provides insights into the influences of climate change on future water footprints of crop production and puts forth regional strategies for future water resource management. In view of future variability in the WFs, a water footprint-based optimization for relocation of crop cultivation areas with the aim of minimising the blue water use would be possible management alternative.

show abstract

Section: Introductionmentioning

confidence: 99%

A high-resolution assessment of climate change impact on water footprints of cereal production in India

Mali

Shirsath

2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…In the current changing environment, both the probability of the occurrence of a strong typhoon and the rainfall intensity during a typhoon event will increase [27][28][29]. Many studies have explored the potential effects of different climate change scenarios on runoff and sediment yield in catchments [30][31][32][33][34]. In addition, there are also several studies focused on the impact of a changing climate on fluvial hydro-morphodynamics, as well as on the uncertainties related to future scenarios [35][36][37][38][39][40][41].…”

mentioning

confidence: 99%

Riverbed Migrations in Western Taiwan under Climate Change

Chao

Chen

et al. 2018

Water

View full text Add to dashboard Cite

In recent years, extreme weather phenomena have occurred worldwide, resulting in many catastrophic disasters. Under the impact of climate change, the frequency of extreme rainfall events in Taiwan will increase, according to a report on climate change in Taiwan. This study analyzed riverbed migrations, such as degradation and aggradation, caused by extreme rainfall events under climate change for the Choshui River, Taiwan. We used the CCHE1D model to simulate changes in flow discharge and riverbed caused by typhoon events for the base period and the end of the 21st century (2075-2099) according to the climate change scenario of representative concentration pathways 8.5 (RCP8.5) and dynamical downscaling of rainfall data in Taiwan. According to the results on flow discharge, at the end of the 21st century, the average peak flow during extreme rainfall events will increase by 20% relative to the base period, but the time required to reach the peak will be 8 h shorter than that in the base period. In terms of the results of degradation and aggradation of the riverbed, at the end of the 21st century, the amount of aggradation will increase by 33% over that of the base period. In the future, upstream sediment will be blocked by the Chichi weir, increasing the severity of scouring downstream. In addition, due to the increased peak flow discharge in the future, the scouring of the pier may be more serious than it is currently. More detailed 2D or 3D hydrological models are necessary in future works, which could adequately address the erosive phenomena created by bridge piers. Our results indicate that not only will flood disasters occur within a shorter time duration, but the catchment will also face more severe degradation and aggradation in the future.but with the recent climate change, stream flow and sediment load have decreased enormously. Foster et al. [8] analyzed changes in sediment transport for the Karoo uplands, South Africa, and found that the sediment yield has generally increased over the past decades, which is related to factors such as the increase in the frequency of high magnitude rainfall events.Numerical models have been employed in engineering studies to predict the flow discharge and riverbed migrations along rivers. Several 1-D models have been proposed, and each model has its advantages and limitations [9]. The use of these models requires the proper simulation of hydraulic conditions [10]. The development of 1-D models is mainly focused on numerical aspects of the advection-dispersion equation [11][12][13] and exchange with dead zones [14][15][16]. Some 1-D models, such as the SIMCAT [17], QUAL2KW [18], and Multiphysics software COMSOL [19], are limited to steady flow conditions, while other models, such as the OTIS [20], CCHE1D [21], MIKE 11 [22], SD model [23], HEC-RAS [24], and ADISTS [25], can simulate unsteady flows and solute transport.In general, the validation testing focuses on theoretical situations or simplified river geometries in limited spatial and temporal scales [26].Climate cha...

show abstract

Spatio-temporal dynamics of rainfall erosivity due to climate change in Cameron Highlands, Malaysia

Nasidi

Wayayok

Abdullah

et al. 2020

Model. Earth Syst. Environ.

View full text Add to dashboard Cite

Climate Change Impacts on Sediment Quality of Subalpine Reservoirs: Implications on Management

Cited by 5 publications

References 98 publications

A high-resolution assessment of climate change impact on water footprints of cereal production in India

A high-resolution assessment of climate change impact on water footprints of cereal production in India

Riverbed Migrations in Western Taiwan under Climate Change

Spatio-temporal dynamics of rainfall erosivity due to climate change in Cameron Highlands, Malaysia

Contact Info

Product

Resources

About