scholarly journals Hydraulic Efficiency of Green-Blue Flood Control Scenarios for Vegetated Rivers: 1D and 2D Unsteady Simulations

Water ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 2620
Author(s):  
Giuseppe Francesco Cesare Lama ◽  
Matteo Rillo Migliorini Giovannini ◽  
Alessandro Errico ◽  
Sajjad Mirzaei ◽  
Roberta Padulano ◽  
...  
Keyword(s):  
Best Management Practices ◽  
Urban Areas ◽  
Flood Control ◽  
Management Practices ◽  
Flood Hazard ◽  
Control Area ◽  
Flood Hazards ◽  
Hydraulic Efficiency ◽  
Peak Reduction ◽  
The Impact

Flood hazard mitigation in urban areas crossed by vegetated flows can be achieved through two distinct approaches, based on structural and eco-friendly solutions, referred to as grey and green–blue engineering scenarios, respectively; this one is often based on best management practices (BMP) and low-impact developments (LID). In this study, the hydraulic efficiency of two green–blue scenarios in reducing flood hazards of an urban area crossed by a vegetated river located in Central Tuscany (Italy), named Morra Creek, were evaluated for a return period of 200 years, by analyzing the flooding outcomes of 1D and 2D unsteady hydraulic simulations. In the first scenario, the impact of a diffuse effect of flood peak reduction along Morra Creek was assessed by considering an overall real-scale growth of common reed beds. In the second scenario, riverine vegetation along Morra Creek was preserved, while flood hazard was mitigated using a single vegetated flood control area. This study demonstrates well the benefits of employing green–blue solutions for reducing flood hazards in vegetated rivers intersecting agro-forestry and urban areas while preserving their riverine ecosystems. It emerged that the first scenario is a valuable alternative to the more impacting second scenario, given the presence of flood control areas.

scholarly journals Assessing the Potential of Nontraditional Water Sources for Landscape Irrigation

2018 ◽  
Vol 28 (4) ◽  
pp. 436-444 ◽  
Author(s):  
Raul I. Cabrera ◽  
James E. Altland ◽  
Genhua Niu
Keyword(s):  
Best Management Practices ◽  
Urban Areas ◽  
Management Practices ◽  
Urban Landscape ◽  
Biological Properties ◽  
Water Sources ◽  
Long Term Effects ◽  
Natural Ecosystems ◽  
Aesthetic Quality ◽  
The Impact

Scarcity and competition for good quality and potable water resources are limiting their use for urban landscape irrigation, with several nontraditional sources being potentially available for these activities. Some of these alternative sources include rainwater, stormwater, brackish aquifer water, municipal reclaimed water (MRW), air-conditioning (A/C) condensates, and residential graywater. Knowledge on their inherent chemical profile and properties, and associated regional and temporal variability, is needed to assess their irrigation quality and potential short- and long-term effects on landscape plants and soils and to implement best management practices that successfully deal with their quality issues. The primary challenges with the use of these sources are largely associated with high concentrations of total salts and undesirable specific ions [sodium (Na), chloride (Cl), boron (B), and bicarbonate (HCO3−) alkalinity]. Although the impact of these alternative water sources has been largely devoted to human health, plant growth and aesthetic quality, and soil physicochemical properties, there is emergent interest in evaluating their effects on soil biological properties and in natural ecosystems neighboring the urban areas where they are applied.

scholarly journals IMPACT OF REGIONAL DISTRIBUTION AND AIR POLLUTION ON INTERNAL STRUCTURE OF MELIA AZEDARACH L. LEAVES

2021 ◽  
Vol 52 (6) ◽  
pp. 1326-1333
Author(s):  
V. Abozaid ◽  
H. Arif Abdulrahman ◽  
D. Ayoub Ibrahim
Keyword(s):  
Air Pollution ◽  
Leaf Area ◽  
Urban Areas ◽  
Regional Distribution ◽  
Industrial Area ◽  
Control Area ◽  
Melia Azedarach ◽  
Layer Width ◽  
Anatomical Features ◽  
The Impact

This study was performed to investigate the impact of air pollution on leaf area and anatomical features of Melia azedarach L. trees, in urban areas with three demographical classes: location (I) industrial area, location (II) roadside area and free parts (control area) as a location (III) of Duhok city/Kurdistan Region-Iraq, during July 2021. The results demonstrated that the leaf area of selected plants' leaves in location I had reduced with no noticeable change in the average stomata density in the three locations I, II and Ⅲ. Meanwhile, the results of the most anatomical features of the blade (blade, lower cuticle, epidermis (both upper and lower) thickness, palisade layer height and spongy parenchyma width) in addition to midrib parameters (epidermis thickness (upper and lower), collenchyma and parenchyma layer width, phloem and xylem width and pith diameter) were decreased in both locations I, II, and with well-developed anatomical features in location III.

scholarly journals Real time controlled sustainable urban drainage systems in dense urban areas

2019 ◽  
Vol 69 (3) ◽  
pp. 238-247 ◽  
Author(s):  
Nils Kändler ◽  
Ivar Annus ◽  
Anatoli Vassiljev ◽  
Raido Puust
Keyword(s):  
Urban Development ◽  
Real Time ◽  
Best Management Practices ◽  
Urban Areas ◽  
Management Practices ◽  
Low Impact Development ◽  
Economic Feasibility ◽  
Control Measures ◽  
Real Time Control ◽  
Urban Catchments

Abstract Stormwater runoff from urban catchments is affected by the changing climate and rapid urban development. Intensity of rainstorms is expected to increase in Northern Europe, and sealing off surfaces reduces natural stormwater management. Both trends increase stormwater peak runoff volume that urban stormwater systems (UDS) have to tackle. Pipeline systems have typically limited capacity, therefore measures must be foreseen to reduce runoff from new developed areas to existing UDS in order to avoid surcharge. There are several solutions available to tackle this challenge, e.g. low impact development (LID), best management practices (BMP) or stormwater real time control measures (RTC). In our study, a new concept of a smart in-line storage system is developed and evaluated on the background of traditional in-line and off-line detention solutions. The system is operated by real time controlled actuators with an ability to predict rainfall dynamics. This solution does not need an advanced and expensive centralised control system; it is easy to implement and install. The concept has been successfully tested in a 12.5 ha urban development area in Tallinn, the Estonian capital. Our analysis results show a significant potential and economic feasibility in the reduction of peak flow from dense urban areas with limited free construction space.

scholarly journals Perceived vulnerability and propensity to adopt best management practices for huanglongbing disease of citrus in California

2021 ◽  
Author(s):  
Sara Garcia Figuera ◽  
Holly Deniston-Sheets ◽  
Elizabeth E Grafton-Cardwell ◽  
Bruce Babcock ◽  
Mark Lubell ◽  
...  
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Control Program ◽  
Integrated Approach ◽  
Perceived Vulnerability ◽  
Best Management ◽  
Preventive Practices ◽  
Citrus Groves ◽  
Plant Disease Management ◽  
The Impact

Huanglongbing (HLB) disease of citrus, associated with the bacterium “Candidatus Liberibacter asiaticus”, is confined to residential properties in Southern California eight years after it was first detected in the state. To prevent the spread of HLB to commercial citrus groves, growers have been asked to adopt a portfolio of voluntary best management practices. This study evaluates the citrus industry’s propensity to adopt these practices using surveys and a novel multivariate ordinal regression model. We estimate the impact on adoption of perceived vulnerability to HLB, intentions to stay informed and communicate about the disease and various socio-economic factors, and reveal what practices are most likely to be jointly adopted as an integrated approach to HLB. Survey participants were in favor of scouting and surveying for HLB symptoms, but they were reluctant to test trees, use early detection technologies (EDTs) or install barriers around citrus groves. Most practices were perceived as complementary, particularly visual inspections and some combinations of preventive practices with tests and EDTs. Participants who felt more vulnerable to HLB had a higher propensity to adopt several practices, as well as those who intended to stay informed and communicate with the coordinators of the HLB control program, although this effect was modulated by the perceived vulnerability to HLB. Communication with neighbors and the size of citrus operations also influenced practice adoption. Based on these results, we provide recommendations for outreach about HLB management in California and suggest future directions for research about the adoption of plant disease management practices.

scholarly journals Present challenges for future water sustainable cities: a case study from Italy

2013 ◽  
Vol 6 (1) ◽  
pp. 151-166
Author(s):  
L. Bonzanigo ◽  
G. Sinnona
Keyword(s):  
Water Management ◽  
Urban Areas ◽  
Management Practices ◽  
Sustainable Use ◽  
Severe Drought ◽  
Sustainable Cities ◽  
Adaptation Measures ◽  
The Future ◽  
Italian Context ◽  
The Impact

Abstract. The global population is increasingly concentrated in cities. Cities and urban areas face many challenges – economic, social, health and environmental – which are often exacerbated by an increase in the frequency of natural disasters. Together, these challenges call for a shift towards sustainable cities which reduce their impact on the surrounding environment, whilst at the same time succeeding to make resources available to their increasing number of inhabitants. This article explores the state of the art of water management practices of the highly urbanised Northern Italian region and plans and scope for the future development of water management. Although the region is at present not under severe water stress, recently some cities faced water scarcity problems and were forced to implement water rationing. We assessed the vulnerability of Parma and Ferrara to a water crisis, together with the regular and emergency adaptation measures already in place, and the forecast for the near future. In two workshops, the authors adapted the Australian concept of Water Sensitive Urban Design for the Italian context. Although the population remains generally unaware of the impact of the two latest severe drought events (2003 and 2006/7), many adaptation measures towards a more sustainable use of the water resource are already in place – technically, institutionally, and individually. Water managers consider however that the drastic and definite changes needed to integrate the urban water management cycle, and which minimise the ecological footprint of urban spaces, lay far in the future.

scholarly journals An Assessment of Municipal Capacity for Human-Wildlife Conflict Management in Selected Urban Areas of Southern Ontario

2021 ◽  
Author(s):  
Stephanie Anee Kalt
Keyword(s):  
Conflict Management ◽  
Best Management Practices ◽  
Urban Areas ◽  
Management Practices ◽  
Urban Environments ◽  
Media Analysis ◽  
Southern Ontario ◽  
Wildlife Conflict ◽  
Human Conflict ◽  
Human Wildlife Conflict

Recently many Canadian municipalities have begun to experiment with urban naturalization programs. Consequently, many urban environments are now inhabited by a much larger wildlife population than they were several decades ago. The more species present in the city, the greater the potential for human-wildlife interaction and/or conflict. Current municipal capacity for human-wildlife conflict management is generally insufficient to deal with growing problems. New solutions for human-wildlife conflict are needed. Using selected municipalities in southern Ontario as an example, this thesis research explores the development and application of principles for wildlife-human conflict management in urban areas. A literature review, media analysis and interviews with key municipal stakeholders were used to identify best management practices. Recommendations for the development of integrated nuisance management (INM) systems are proposed based on study findings.

scholarly journals The Role of Electric Power Sector in China’s Global Economic Expansion

2019 ◽  
Vol 12 (6) ◽  
pp. 188-202
Author(s):  
R. A. Epikhina
Keyword(s):  
Developing Countries ◽  
Best Management Practices ◽  
Nuclear Power ◽  
Management Practices ◽  
Power Transmission ◽  
Developed Countries ◽  
Electricity Sector ◽  
Power Sector ◽  
Economic Expansion ◽  
The Impact

The article discusses some of the major characteristics and trends of China’s economic expansion in the global power industry. It argues that by investing in electricity infrastructure China creates prerequisites for long-term dominance in one of the key sectors in a number of countries and regions. Deals in the power sector are mainly implemented by state-owned companies and facilitated by state-owned financial institutions. In terms of structure and geography, foreign investment in the electricity sector is dominated by traditional types of generation in developing countries. However, China has been diversifying into renewables, nuclear power and grids and entering markets of the developed countries. The creation of a special international organization (GEIDCO) should facilitate its expansion in the electricity sector abroad. It is worth noting that foreign economic expansion plays an important role in supporting China’s slowing economy amid the transformation of its growth model. It allows China to adopt advanced technologies and best management practices in developed countries while forming alternative value chains, as well as promoting its own equipment and standards (especially in ultra-high voltage power transmission) in the developing countries. However, given the impact of the trade war, increasing securitization of the Chinese foreign investments, Chinese authorities’ control over capital outflows and the rising environmental concerns in developing countries, further expansion of the Chinese capital in the global electricity industry is likely to be held back, while competition from non-Chinese electricity companies is likely to grow.

scholarly journals Soil Temperatures of the Transylvanian Plain, Romania

1970 ◽  
Vol 66 (1) ◽  
Author(s):  
David WEINDORF ◽  
Beatrix HAGGARD ◽  
Teodor RUSU ◽  
Horea CACOVEAN ◽  
Stephanie JOHNSON
Keyword(s):  
Soil Moisture ◽  
Best Management Practices ◽  
Annual Variation ◽  
Management Practices ◽  
Physicochemical Analysis ◽  
Slope Aspect ◽  
Best Management ◽  
Important Region ◽  
Soil Temperatures ◽  
The Impact

The Transylvanian Plain, Romania is an important region for agronomic productivity. However, limited soils data and adoption of best management practices can hinder land productivity. Soil temperatures of the Transylvanian Plain were evaluated using a set of twenty datalogging stations positioned throughout the plain. Soil temperatures were monitored at the surface, 10 cm, 30 cm, and 50 cm, and soil moisture was monitored at 10 cm. Pedons were excavated, described, and sampled for physicochemical analysis. Preliminary results indicate that most soils of the Transylvanian Plain will have a mesic temperature regime. However, differences in seasonal warming and cooling trends across the plain were noted. These have important implications for planting recommendations. Some soils of the plain were noted to freeze at 50 cm, while others did not. Longer term study of temperatures of the Transylvanian Plain will average out annual variation in soil temperature and evaluate the impact of slope aspect, slope inclination, soil moisture, and physicochemical properties on soil temperatures.

scholarly journals Analysis and Projection of Flood Hazards over China

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 1022 ◽  
Author(s):  
Yulian Liang ◽  
Yongli Wang ◽  
Yinjun Zhao ◽  
Yuan Lu ◽  
Xiaoying Liu
Keyword(s):  
21St Century ◽  
Flood Control ◽  
Climate Model ◽  
Southern China ◽  
Flood Hazard ◽  
Global Climate ◽  
Global Climate Model ◽  
Flood Hazards ◽  
Rcp Scenarios ◽  
Meteorological Observations

Floods have been experienced with greater frequency and more severity under global climate change. To understand the flood hazard and its variation in the future, the current and future flood hazards in the 21st century in China are discussed. Floods and their trends are assessed using the accumulation precipitation during heavy rainfall process (AP_HRP), which are calculated based on historical meteorological observations and the outputs of a global climate model (GCM) under three Representative Concentration Pathway (RCP) scenarios. The flood-causing HRPs counted by the flood-causing critical precipitation (the 60% fractile of AP_HRP) capture more than 70% of historical flood events. The projection results indicate that the flood hazards could increase under RCP4.5 and RCP8.5 and increase slightly under RCP2.6 during the 21st century (2011–2099). The spatial characteristics of flood hazards and their increasing trends under the three RCPs are similar in most areas of China. More floods could occur in southern China, including Guangdong, Hainan, Guangxi and Fujian provinces, which could become more serious in southeastern China and the northern Yunnan province. Construction of water conservancy projects, reservoir dredging, improvement of drainage and irrigation equipment and enhancement of flood control and storage capacity can mitigate the impacts of floods and waterlogging on agriculture.

scholarly journals Evaluating the impact of model complexity on flood wave propagation and inundation extent with a hydrologic–hydrodynamic model coupling framework

2019 ◽  
Vol 19 (8) ◽  
pp. 1723-1735 ◽  
Author(s):  
Jannis M. Hoch ◽  
Dirk Eilander ◽  
Hiroaki Ikeuchi ◽  
Fedor Baart ◽  
Hessel C. Winsemius
Keyword(s):  
Flood Risk ◽  
Management Practices ◽  
Flood Hazard ◽  
Hydrologic Model ◽  
Model Complexity ◽  
Model Coupling ◽  
Coupled Models ◽  
Flood Simulations ◽  
Inundation Extent ◽  
The Impact

Abstract. Fluvial flood events are a major threat to people and infrastructure. Typically, flood hazard is driven by hydrologic or river routing and floodplain flow processes. Since they are often simulated by different models, coupling these models may be a viable way to increase the integration of different physical drivers of simulated inundation estimates. To facilitate coupling different models and integrating across flood hazard processes, we here present GLOFRIM 2.0, a globally applicable framework for integrated hydrologic–hydrodynamic modelling. We then tested the hypothesis that smart model coupling can advance inundation modelling in the Amazon and Ganges basins. By means of GLOFRIM, we coupled the global hydrologic model PCR-GLOBWB with the hydrodynamic models CaMa-Flood and LISFLOOD-FP. Results show that replacing the kinematic wave approximation of the hydrologic model with the local inertia equation of CaMa-Flood greatly enhances accuracy of peak discharge simulations as expressed by an increase in the Nash–Sutcliffe efficiency (NSE) from 0.48 to 0.71. Flood maps obtained with LISFLOOD-FP improved representation of observed flood extent (critical success index C=0.46), compared to downscaled products of PCR-GLOBWB and CaMa-Flood (C=0.30 and C=0.25, respectively). Results confirm that model coupling can indeed be a viable way forward towards more integrated flood simulations. However, results also suggest that the accuracy of coupled models still largely depends on the model forcing. Hence, further efforts must be undertaken to improve the magnitude and timing of simulated runoff. In addition, flood risk is, particularly in delta areas, driven by coastal processes. A more holistic representation of flood processes in delta areas, for example by incorporating a tide and surge model, must therefore be a next development step of GLOFRIM, making even more physically robust estimates possible for adequate flood risk management practices.

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